EN ISO 19629:2022
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical properties of ceramic composites - Determination of unidimensional thermal diffusivity by flash method (ISO 19629:2018)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical properties of ceramic composites - Determination of unidimensional thermal diffusivity by flash method (ISO 19629:2018)
This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement.
In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite.
The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10−4 m2∙s−1 to 10−7 m2∙s−1.
Hochleistungskeramik - Thermophysikalische Eigenschaften keramischer Verbundwerkstoffe - Bestimmung der eindimensionalen Temperaturleitfähigkeit mittels Flashverfahren (ISO 19629:2018))
Dieses Dokument legt das Flash-Verfahren zur Bestimmung der Temperaturleitfähigkeit von endlos-faserverstärkten Verbundwerkstoffen mit keramischer Matrix fest.
Um der Hypothese der eindimensionalen Wärmeübertragung zu entsprechen, werden die Versuchsbedingun¬gen so festgelegt, dass sich der Werkstoff homogen verhält. Dabei werden Prüfungen in einer Symmetrieachse des Verbundwerkstoffs durchgeführt.
Dieses Dokument ist anzuwenden für Werkstoffe, die sich während der Messung physikalisch und chemisch nicht verändern, und berücksichtigt den Temperaturbereich von 100 K bis 2 800 K. Es ist für die Messung von Temperaturleit¬fähigkeitswerten im Bereich von 10−4 m2⋅s−1 bis 10−7 m2⋅s−1 geeignet.
Céramiques techniques - Propriétés thermophysiques des composites céramiques - Détermination de la diffusivité thermique unidimensionnelle par la méthode flash (ISO 19629:2018)
Le présent document décrit la méthode flash utilisée pour déterminer la diffusivité thermique de composites à matrice céramique renforcés de fibres continues.
Pour se conformer à l'hypothèse de transfert de chaleur unidimensionnel, les conditions expérimentales sont définies de sorte que le matériau se comporte de manière homogène. Cela implique de réaliser les mesures dans un axe de symétrie du composite.
La méthode s'applique aux matériaux qui sont physiquement et chimiquement stables lors de la mesure et couvre la plage de température allant de 100 K à 2 800 K. Elle est adaptée à la mesure des valeurs de diffusivité thermique situées dans la plage de 10−4 m2∙s−1 à 10−7 m2∙s−1.
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Termofizikalne lastnosti keramičnih kompozitov - Ugotavljanje enodimenzionalne toplotne difuzivnosti z bliskovno metodo (ISO 19629:2018)
Ta dokument opisuje bliskovno metodo za določanje toplotne difuzivnosti keramičnih matričnih kompozitov z neprekinjeno ojačitvijo z vlakni.
Za zagotavljanje skladnosti s hipotezo enodimenzionalnega prenosa toplote so opredeljeni eksperimentalni pogoji, pri katerih se material obnaša na homogen način. To vključuje izvajanje preskusov na eni simetrični osi kompozita.
Metoda je uporabna za materiale, ki so med meritvijo fizično in kemično stabilni; obsega temperaturno območje od 100 K do 2800 K. Primerna je za merjenje vrednosti toplotne difuzivnosti v območju od 10−4 m2 s−1 do 10−7 m2 s−1.
General Information
- Status
- Published
- Publication Date
- 19-Apr-2022
- Withdrawal Date
- 30-Oct-2022
- Technical Committee
- CEN/TC 184 - Advanced technical ceramics
- Drafting Committee
- CEN/TC 184/SC 1 - Ceramic composites
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 20-Apr-2022
- Completion Date
- 20-Apr-2022
Relations
- Effective Date
- 27-Apr-2022
Overview
EN ISO 19629:2022 (identical to ISO 19629:2018) specifies the flash method for determination of unidimensional thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement. Published by CEN, the standard defines experimental conditions that ensure a unidimensional heat-transfer regime so the composite behaves effectively homogeneous along one symmetry axis. The method applies to materials stable during measurement over a wide temperature range (100 K to 2 800 K) and for thermal diffusivity values from 10−4 m²·s−1 to 10−7 m²·s−1.
Key topics and technical requirements
- Principle: A short, spatially uniform energy pulse (flash tube or pulse laser) is applied to the front face; the transient temperature rise on the back face is recorded and compared with a unidimensional analytical thermal model to obtain thermal diffusivity.
- Test specimens: Plane-parallel samples with thickness (h) defined in direction of heat transfer; testing is performed along one symmetry axis.
- Apparatus:
- Heat pulse source: flash lamp or pulse laser with uniform energy distribution.
- Test chamber: furnace, cryostat or draught-proof enclosure; furnace design requirements limit spatial gradients and drift.
- Detectors: thermocouples or optical pyrometers for absolute temperature; transient detectors (photodetectors or thermocouples) must detect changes ≥ 0.05 K and be linear for ΔT ≤ 5 K.
- Data acquisition and calibration: procedures to ensure timing accuracy and detector response are required.
- Environmental control: Tests can be run under vacuum (to reduce convection and oxidation) or gas; horizontal specimen orientation reduces convective effects.
- Measurement modelling: Use of the standard’s unidimensional analytical model (Annex A); other models must be documented in the test report.
- Reporting: Results, uncertainties, calibration, specimen preparation and any deviations from the standard model must be included.
Applications and users
EN ISO 19629 is essential for:
- Materials engineers characterizing thermophysical properties of advanced ceramics and ceramic composites.
- R&D teams developing high-performance ceramic-matrix composites for aerospace, power generation, thermal barrier coatings, and nuclear applications.
- Quality and test laboratories performing comparative thermal property measurements across temperatures.
- Designers and simulation engineers who require validated thermal diffusivity inputs for heat-transfer models.
Practical benefits include standardized, reproducible thermal diffusivity data used in thermal design, life prediction, and material selection for high-temperature components.
Related standards
- ISO 20507 - Fine ceramics vocabulary (terms and definitions).
- ISO 3611 - Dimensional measuring equipment (relevant for specimen dimensions).
- EN 60584-1 (IEC 60584‑1) - Thermocouples - reference tables (for temperature measurement).
Frequently Asked Questions
EN ISO 19629:2022 is a standard published by the European Committee for Standardization (CEN). Its full title is "Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical properties of ceramic composites - Determination of unidimensional thermal diffusivity by flash method (ISO 19629:2018)". This standard covers: This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement. In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite. The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10−4 m2∙s−1 to 10−7 m2∙s−1.
This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement. In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite. The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10−4 m2∙s−1 to 10−7 m2∙s−1.
EN ISO 19629:2022 is classified under the following ICS (International Classification for Standards) categories: 81.060.30 - Advanced ceramics. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 19629:2022 has the following relationships with other standards: It is inter standard links to EN 1159-2:2003. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 19629:2022 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2022
Nadomešča:
SIST EN 1159-2:2004
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Termofizikalne
lastnosti keramičnih kompozitov - Ugotavljanje enodimenzionalne toplotne
difuzivnosti z bliskovno metodo (ISO 19629:2018)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical
properties of ceramic composites - Determination of unidimensional thermal diffusivity by
flash method (ISO 19629:2018)
Hochleistungskeramik - Thermophysikalische Eigenschaften keramischer
Verbundwerkstoffe - Bestimmung der Temperaturleitfähigkeit (ISO 19629:2018)
Céramiques techniques - Propriétés thermophysiques des composites céramiques -
Détermination de la diffusivité thermique unidimensionnelle par la méthode flash (ISO
19629:2018)
Ta slovenski standard je istoveten z: EN ISO 19629:2022
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 19629
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 1159-2:2003
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Thermophysical properties of ceramic
composites - Determination of unidimensional thermal
diffusivity by flash method (ISO 19629:2018)
Céramiques techniques - Propriétés thermophysiques Hochleistungskeramik - Thermophysikalische
des composites céramiques - Détermination de la Eigenschaften keramischer Verbundwerkstoffe -
diffusivité thermique unidimensionnelle par la Bestimmung der Temperaturleitfähigkeit (ISO
méthode flash (ISO 19629:2018) 19629:2018)
This European Standard was approved by CEN on 27 March 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19629:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 19629:2018 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 19629:2022
by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2022, and conflicting national standards shall
be withdrawn at the latest by October 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1159-2:2003.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 19629:2018 has been approved by CEN as EN ISO 19629:2022 without any modification.
INTERNATIONAL ISO
STANDARD 19629
First edition
2018-08
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Thermophysical properties of ceramic
composites — Determination of
unidimensional thermal diffusivity by
flash method
Céramiques techniques — Propriétés thermophysiques des
composites céramiques — Détermination de la diffusivité thermique
unidimensionnelle par la méthode flash
Reference number
ISO 19629:2018(E)
©
ISO 2018
ISO 19629:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
ISO 19629:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Heat pulse source. 2
5.2 Test chamber . 2
5.3 Detectors . 2
5.3.1 Measurement of absolute temperature . 2
5.3.2 Transient detectors . . 3
5.4 Data acquisition . 3
6 Test specimens. 4
7 Test specimen preparation . 4
7.1 Machining and preparation . 4
7.2 Number of test specimens . 4
8 Procedure. 4
8.1 Calibration of apparatus . 4
8.2 Procedure . 4
9 Results . 5
9.1 Determination of the thermal diffusivity . 5
9.2 Sources of uncertainties. 5
10 Test report . 5
Annex A (informative) Unidimensional thermal model . 9
Annex B (informative) Experimental characteristics for optimal measurements .11
Bibliography .12
ISO 19629:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved
INTERNATIONAL STANDARD ISO 19629:2018(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Thermophysical properties of ceramic
composites — Determination of unidimensional thermal
diffusivity by flash method
1 Scope
This document describes the flash method for the determination of thermal diffusivity of ceramic
matrix composites with continuous fibre reinforcement.
In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are
defined such that the material behaves in a homogeneous manner. This involves performing tests in one
symmetry axis of the composite.
The method is applicable to materials which are physically and chemically stable during the
measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the
−4 2 −1 −7 2 −1
measurement of thermal diffusivity values in the range 10 m ∙s to 10 m ∙s .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3611, Geometrical product specifications (GPS) — Dimensional measuring equipment: Micrometers for
external measurements — Design and metrological characteristics
ISO 20507, Fine ceramics (advanced ceramics, advanced technical ceramics) — Vocabulary
EN 60584-1, Thermocouples — Part 1: Reference tables (IEC 60584‑1:1995)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20507 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
thermal diffusivity
a
ratio of the thermal conductivity to the product of the bulk density and the specific heat capacity
3.2
transient half time
t
1/2
time from the initiation of the pulse until the increase of the temperature on the back face of the test
specimen reaches one half of the maximum temperature increase
ISO 19629:2018(E)
3.3
thickness
h
dimension of the test specimen in the direction of heat transfer measurement
4 Principle
One side of a plane- and parallel-face test piece is exposed to a uniformly distributed energy pulse that
is of very short duration compared with the transient half time.
The transient temperature rise (ΔT) on the opposite face (back face) or a quantity directly proportional
to ΔT is recorded as a function of time (t) (see Figure 1).
The thermal diffusivity is obtained by comparing the experimental thermogram with a theoretical
model, which is a unidimensional analytical thermal model, with two parameters, as described in
Annex A. If other models are used, they are to be specified in the test report.
5 Apparatus
5.1 Heat pulse source
The heat pulse source may be a flash tube or a pulse laser.
The pulse energy shall be as uniform as possible over the front face of the test piece.
5.2 Test chamber
The test chamber shall be either a furnace or a cryostat, capable of operation within the temperature
...
SIST EN ISO 19629:2022 표준 문서는 고급 세라믹 및 세라믹 복합재의 열물리적 특성을 측정하는 데 필수적인 규정을 제공합니다. 이 표준의 주요 목적은 연속 섬유 보강을 가진 세라믹 매트릭스 복합재의 일차원 열 확산도를 측정하기 위해 플래시 방법을 규명하는 것입니다. 이 표준의 범위는 단순히 열 확산도를 측정하는 것에 그치지 않고, 실험 조건을 정의하여 재료가 균일한 방식으로 동작하도록 하여 일차원 열 전달 가설에 부합하는 것을 목표로 합니다. 이러한 접근 방식은 복합재의 대칭축을 따라 테스트를 수행함으로써 재료의 물리적 및 화학적 안정성을 보장합니다. SIST EN ISO 19629:2022 표준은 100 K에서 2,800 K의 온도 범위를 커버하며, 10−4 m²∙s⁻¹에서 10−7 m²∙s⁻¹의 열 확산도 값을 측정하는 데 적합한 방법론을 제시하고 있습니다. 이는 다양한 고급 세라믹 제품의 열적 특성을 안전하고 효과적으로 검증할 수 있는 강력한 도구로 작용합니다. 이 표준은 고급 세라믹 분야에서 연구 및 산업적 적용이 늘어나는 현재, 매우 중요한 의미를 지니며, 재료 과학 및 공학 분야에서의 품질 관리 및 혁신 촉진에 기여할 것입니다.
SIST EN ISO 19629:2022は、先進的なセラミックや技術的セラミックにおける熱物性の特性を安全かつ効果的に評価するための重要な基準を提供しています。この標準の主な焦点は、連続繊維強化されたセラミックマトリックス複合材料の一方向性熱拡散率の決定を目的としたフラッシュ法の詳細な解説にあります。 この標準の強みとしては、異なる温度範囲（100 Kから2 800 Kまで）にわたる精密な測定が可能であることが挙げられます。また、熱拡散率の値を10−4 m2・s−1から10−7 m2・s−1の範囲で評価することができるため、多様な材料特性に対応しています。さらに、実験条件が一方向性の熱伝達仮説に従って定義されているため、広範囲な応用が可能であり、材料が均一に振る舞うことを保証します。この均質性により、計測結果の信頼性が高まります。 加えて、実験中に物理的および化学的に安定であることが求められるため、測定対象の複合材料が一貫した性能を発揮できる点も、この標準の重要な特徴です。これにより、研究者や技術者は、さまざまな応用分野において、正確かつ信頼性の高いデータを得ることができます。 このように、SIST EN ISO 19629:2022は、セラミック複合材料の特性評価に不可欠なフレームワークを提供しており、学術研究や産業界での応用においても高い relevance を持っています。
The EN ISO 19629:2022 standard provides a comprehensive framework for the measurement of thermal diffusivity in ceramic matrix composites utilizing the flash method. This standard specifically targets advanced ceramics and advanced technical ceramics, underscoring its relevance in industries where accurate thermal property measurement is critical. The scope of the standard is well-defined, focusing on materials with continuous fiber reinforcement. By adhering to the unidimensional heat transfer hypothesis, the guidelines ensure that the experimental conditions yield homogeneous behavior of the materials. This rigorous approach enhances the reliability of the results, providing confidence to researchers and manufacturers in the characterization of thermal properties. One of the strengths of this standard lies in its broad temperature range, spanning from 100 K to 2 800 K, which allows for the examination of thermal diffusivity across a wide array of conditions. The specified measurement range of thermal diffusivity values, from 10−4 m²∙s⁻¹ to 10−7 m²∙s⁻¹, further highlights its adaptability to various ceramic composites, reinforcing its importance in both academic research and industrial applications. Moreover, the emphasis on stable physical and chemical conditions during measurements ensures that the data collected are robust and reflective of true material performance. This focus on experimental integrity facilitates advancements in material design and application, particularly in demanding environments where thermal management is crucial. Overall, the EN ISO 19629:2022 standard plays a vital role in standardizing the assessment of the thermophysical properties of ceramic composites, promoting consistency and accuracy in the evaluation of thermal diffusivity. Its tailored approach significantly contributes to the field of advanced ceramics, making it an essential reference for professionals engaged in material science and engineering.
La norme EN ISO 19629:2022 se distingue par son approche rigoureuse pour la détermination des propriétés thermophysiques des composites céramiques, en particulier à travers la méthode flash. Cette norme est essentielle pour les professionnels travaillant avec des céramiques avancées, car elle détaille un protocole standardisé pour mesurer la diffusivité thermique unidimensionnelle des composites à matrice céramique renforcés par des fibres continues. L'un des points forts de cette norme est son adhérence à l'hypothèse de transfert de chaleur unidimensionnel, ce qui nécessite des conditions expérimentales spécifiques pour garantir que le matériau se comporte de manière homogène. Cela renforce la fiabilité des résultats obtenus, rendant cette norme particulièrement pertinente dans les applications industrielles où les propriétés thermiques sont critiques. La norme EN ISO 19629:2022 couvre une large gamme de températures, de 100 K à 2 800 K, offrant ainsi une flexibilité pour l'analyse de divers matériaux céramiques. Cela permet aux utilisateurs de mesurer la diffusivité thermique dans une plage de valeurs allant de 10−4 m2∙s−1 à 10−7 m2∙s−1, ce qui englobe une variété d'échantillons et de conditions de test. De plus, l'exigence que les matériaux soient physiquement et chimiquement stables durant les mesures garantit la précision et la répétabilité des données recueillies, ce qui est une préoccupation majeure dans le domaine des céramiques avancées. En somme, la norme EN ISO 19629:2022 se révèle être un outil incontournable pour toute entreprise ou chercheur impliqué dans l'évaluation des propriétés thermophysiques des composites céramiques, consolidant ainsi son rôle dans le développement et l'innovation dans le secteur des matériaux avancés.
Die Norm EN ISO 19629:2022 behandelt die Bestimmung der unidimensionalen thermischen Diffusivität von keramischen Verbundwerkstoffen mittels der Flash-Methode. Der Anwendungsbereich dieser Norm ist klar definiert und stellt sicher, dass die experimentellen Bedingungen so gestaltet sind, dass das Material in Bezug auf die Wärmeübertragung homogene Eigenschaften aufweist. Dies ist besonders wichtig, da die Messungen entlang einer Symmetrieachse des Verbundmaterials durchgeführt werden. Ein besonderes Augenmerk gilt den thermophysikalischen Eigenschaften von keramischen Matrixverbundstoffen mit kontinuierlicher Faserverstärkung. Die Norm ist von hoher Relevanz für die Entwicklung und Anwendung von fortschrittlichen Keramiken, da sie einen standardisierten Ansatz zur Bewertung der thermischen Diffusivität bietet. Die Fähigkeit, Messungen im Temperaturbereich von 100 K bis 2 800 K durchzuführen, ermöglicht eine umfassende Analyse der Materialeigenschaften unter verschiedenen Bedingungen. Die Stärken dieser Norm liegen in ihrer Fähigkeit, präzise und verlässliche Daten für die thermophysikalischen Eigenschaften zu liefern, was für Forschungs- und Entwicklungsprojekte im Bereich der hochentwickelten keramischen Materialien von entscheidender Bedeutung ist. Die Norm behandelt Materialien, die während der Messung physikalisch und chemisch stabil sind, und deckt einen breiten Bereich von thermischen Diffusivitätswerten von 10−4 m²∙s⁻¹ bis 10−7 m²∙s⁻¹ ab, was ihre Anwendbarkeit in verschiedenen industriellen und technologischen Bereichen unterstreicht. Insgesamt bietet die EN ISO 19629:2022 eine fundierte und detaillierte Grundlage für die Bestimmung der thermischen Diffusivität von keramischen Verbundwerkstoffen und leistet einen bedeutenden Beitrag zur Standardisierung in der Branche für fortschrittliche Keramiken.
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