SIST EN ISO 19634:2021
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites - Notations and symbols (ISO 19634:2017)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites - Notations and symbols (ISO 19634:2017)
This document defines the symbols to be used to represent physical, mechanical and thermal characteristics, as determined by methods described in relevant ISO publications, for ceramic matrix composites. It is aimed at avoiding confusion in reporting measurements and characteristics of products.
Where possible, the definitions are in accordance with the relevant parts of ISO 80000. In addition, the symbols used in undertaking measurements of these characteristics are also defined.
Hochleistungskeramik - Keramische Verbundwerkstoffe - Bezeichnungen und Formelzeichen (ISO 19634:2017)
Céramiques techniques - Céramiques composites - Notations et symboles (ISO 19634:2017)
L'ISO 19634 :2017 définit les symboles à utiliser pour représenter les caractéristiques physiques, mécaniques et thermiques, telles que déterminées par les méthodes décrites dans les publications ISO concernées, pour les composites à matrice céramique. Il vise à éviter toute confusion dans les rapports de mesures et de caractéristiques des produits.
Dans toute la mesure du possible, les définitions sont conformes aux parties pertinentes de l'ISO 80000. En outre, les symboles utilisés pour la mesure de ces caractéristiques sont également définis.
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Keramični kompoziti - Oznake in simboli (ISO 19634:2017)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 19634:2021
01-september-2021
Nadomešča:
SIST-TP CEN/TR 13233:2007
SIST-TP CEN/TR 13233:2007/AC:2008
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Keramični
kompoziti - Oznake in simboli (ISO 19634:2017)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites
- Notations and symbols (ISO 19634:2017)
Hochleistungskeramik - Keramische Verbundwerkstoffe - Bezeichnungen und
Formelzeichen (ISO 19634:2017)
Céramiques techniques - Céramiques composites - Notations et symboles (ISO
19634:2017)
Ta slovenski standard je istoveten z: EN ISO 19634:2021
ICS:
01.075 Simboli za znake Character symbols
81.060.30 Sodobna keramika Advanced ceramics
SIST EN ISO 19634:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 19634:2021
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SIST EN ISO 19634:2021
EN ISO 19634
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes CEN/TR 13233:2007
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Ceramic composites - Notations and symbols
(ISO 19634:2017)
Céramiques techniques - Céramiques composites - Hochleistungskeramik - Keramische
Notations et symboles (ISO 19634:2017) Verbundwerkstoffe - Benennungen und Formelzeichen
(ISO 19634:2017)
This European Standard was approved by CEN on 11 July 2021.
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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19634:2021 E
worldwide for CEN national Members.
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SIST EN ISO 19634:2021
EN ISO 19634:2021 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 19634:2021
EN ISO 19634:2021 (E)
European foreword
The text of ISO 19634:2017 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 19634:2021
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 January 2022, and conflicting national standards shall
be withdrawn at the latest by January 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 CEN/TR 13233:2007.
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 19634:2017 has been approved by CEN as EN ISO 19634:2021 without any modification.
3
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SIST EN ISO 19634:2021
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SIST EN ISO 19634:2021
INTERNATIONAL ISO
STANDARD 19634
First edition
2017-10
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Ceramic composites — Notations and
symbols
Céramiques techniques — Céramiques composites — Notations et
symboles
Reference number
ISO 19634:2017(E)
©
ISO 2017
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SIST EN ISO 19634:2021
ISO 19634:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 19634:2021
ISO 19634:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 4
5 Significance and use .12
5.1 Significance .12
5.2 Use .12
Bibliography .13
© ISO 2017 – All rights reserved iii
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SIST EN ISO 19634:2021
ISO 19634:2017(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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2017 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 19634:2021
INTERNATIONAL STANDARD ISO 19634:2017(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Ceramic composites — Notations and symbols
1 Scope
This document defines the symbols to be used to represent physical, mechanical and thermal
characteristics, as determined by methods described in relevant ISO publications, for ceramic matrix
composites. It is aimed at avoiding confusion in reporting measurements and characteristics of
products.
Where possible, the definitions are in accordance with the relevant parts of ISO 80000. In addition, the
symbols used in undertaking measurements of these characteristics are also defined.
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 80000-4, Quantities and units — Part 4: Mechanics
ISO 80000-5, Quantities and units — Part 5: Thermodynamics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 80000-4 and ISO 80000-5 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
ceramic matrix composite
ceramic, carbon or glass matrix containing reinforcement distributed in one or more spatial directions
Note 1 to entry: Composites with continuous reinforcements constitute a specific class of these materials. Several
subclasses of ceramic matrix composites with continuous reinforcements can be distinguished.
3.2
nomenclature
The symbol F/I/M applies usually to ceramic matrix composites:
— F indicates the chemical nature of fibrous reinforcement: C stands for carbon, SiC for silicon carbide,
Al O for alumina, etc.
2 3
— I indicates the chemical nature of fibre/matrix interphase: C stands for carbon, BN for boron nitride,
LaPO for monazite, etc.
4
— M indicates the chemical nature of matrix: C for carbon, SiC for silicon carbide, Al O for alumina.
2 3
EXAMPLE 1 A ceramic matrix composite composed of a silicon carbide fibre, a carbon interphase and a silicon
carbide matrix is denoted by SiC/C/SiC.
© ISO 2017 – All rights reserved 1
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SIST EN ISO 19634:2021
ISO 19634:2017(E)
Note 1 to entry: More complex symbols can be used to describe the constituents with a greater degree of
precision.
EXAMPLE 2 For a composite composed of a carbon fibre, a multi-layered interphase of four alternate layers of
carbon and silicon carbide, and a silicon carbide matrix, the symbol is: C /[C/SiC] /SiC .
f 4 m
3.3
unidirectional ceramic matrix composite
1D material
ceramic matrix composite (3.1), the reinforcement of which is distributed in one single direction
Note 1 to entry: See Figure 1.
Key
1 direction of reinforcement
2 direction of the greater transverse dimension (width), perpendicular to direction 1
3 direction of the smaller transverse dimension (thickness), perpendicular to direction 1
NOTE When the width and the thickness are equal, then directions 2 and 3 are equivalent and can be chosen freely.
Figure 1 — Schematic diagram of a 1D material
3.4
in-plane reinforced ceramic matrix composite
2D material
ceramic matrix composite (3.1), where the reinforcements are placed along at least two directions in a
single plane
Note 1 to entry: See Figure 2.
2 © ISO 2017 – All rights reserved
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SIST EN ISO 19634:2021
ISO 19634:2017(E)
Key
1 direction of the greater fraction of reinforcement
2 direction perpendicular to direction 1 in the plane of reinforcement (not necessarily a direction of
reinforcement)
3 direction perpendicular to the plane of reinforcement
NOTE Strictly more than one direction of fibrous reinforcement, all contained within one plane [in the present
case, three directions of reinforcement in plane (1,2)].
When several directions have an equal fraction of reinforcement, it shall be stated which direction is chosen
as direction 1 in relation to the reinforcement structure (for example, orthogonal reinforced fabric: warp in
direction 1, weft in direction 2).
Figure 2 — Schematic diagram of a 2D material
3.5
multidirectional ceramic matrix composite
xD (2 < × ≤3) material
ceramic matrix composite (3.1), where the reinforcement is spatially distributed in at least three
directions not in a single plane
Note 1 to entry: See Figures 3
...
SLOVENSKI STANDARD
oSIST prEN ISO 19634:2021
01-maj-2021
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Keramični
kompoziti - Oznake in simboli (ISO 19634:2017)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites
- Notations and symbols (ISO 19634:2017)
Hochleistungskeramik - Keramische Verbundwerkstoffe - Bezeichnungen und
Formelzeichen (ISO 19634:2017)
Céramiques techniques - Céramiques composites - Notations et symboles (ISO
19634:2017)
Ta slovenski standard je istoveten z: prEN ISO 19634
ICS:
01.075 Simboli za znake Character symbols
81.060.30 Sodobna keramika Advanced ceramics
oSIST prEN ISO 19634:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 19634:2021
---------------------- Page: 2 ----------------------
oSIST prEN ISO 19634:2021
INTERNATIONAL ISO
STANDARD 19634
First edition
2017-10
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Ceramic composites — Notations and
symbols
Céramiques techniques — Céramiques composites — Notations et
symboles
Reference number
ISO 19634:2017(E)
©
ISO 2017
---------------------- Page: 3 ----------------------
oSIST prEN ISO 19634:2021
ISO 19634:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 19634:2021
ISO 19634:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 4
5 Significance and use .12
5.1 Significance .12
5.2 Use .12
Bibliography .13
© ISO 2017 – All rights reserved iii
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oSIST prEN ISO 19634:2021
ISO 19634:2017(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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2017 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 19634:2021
INTERNATIONAL STANDARD ISO 19634:2017(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Ceramic composites — Notations and symbols
1 Scope
This document defines the symbols to be used to represent physical, mechanical and thermal
characteristics, as determined by methods described in relevant ISO publications, for ceramic matrix
composites. It is aimed at avoiding confusion in reporting measurements and characteristics of
products.
Where possible, the definitions are in accordance with the relevant parts of ISO 80000. In addition, the
symbols used in undertaking measurements of these characteristics are also defined.
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 80000-4, Quantities and units — Part 4: Mechanics
ISO 80000-5, Quantities and units — Part 5: Thermodynamics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 80000-4 and ISO 80000-5 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
ceramic matrix composite
ceramic, carbon or glass matrix containing reinforcement distributed in one or more spatial directions
Note 1 to entry: Composites with continuous reinforcements constitute a specific class of these materials. Several
subclasses of ceramic matrix composites with continuous reinforcements can be distinguished.
3.2
nomenclature
The symbol F/I/M applies usually to ceramic matrix composites:
— F indicates the chemical nature of fibrous reinforcement: C stands for carbon, SiC for silicon carbide,
Al O for alumina, etc.
2 3
— I indicates the chemical nature of fibre/matrix interphase: C stands for carbon, BN for boron nitride,
LaPO for monazite, etc.
4
— M indicates the chemical nature of matrix: C for carbon, SiC for silicon carbide, Al O for alumina.
2 3
EXAMPLE 1 A ceramic matrix composite composed of a silicon carbide fibre, a carbon interphase and a silicon
carbide matrix is denoted by SiC/C/SiC.
© ISO 2017 – All rights reserved 1
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oSIST prEN ISO 19634:2021
ISO 19634:2017(E)
Note 1 to entry: More complex symbols can be used to describe the constituents with a greater degree of
precision.
EXAMPLE 2 For a composite composed of a carbon fibre, a multi-layered interphase of four alternate layers of
carbon and silicon carbide, and a silicon carbide matrix, the symbol is: C /[C/SiC] /SiC .
f 4 m
3.3
unidirectional ceramic matrix composite
1D material
ceramic matrix composite (3.1), the reinforcement of which is distributed in one single direction
Note 1 to entry: See Figure 1.
Key
1 direction of reinforcement
2 direction of the greater transverse dimension (width), perpendicular to direction 1
3 direction of the smaller transverse dimension (thickness), perpendicular to direction 1
NOTE When the width and the thickness are equal, then directions 2 and 3 are equivalent and can be chosen freely.
Figure 1 — Schematic diagram of a 1D material
3.4
in-plane reinforced ceramic matrix composite
2D material
ceramic matrix composite (3.1), where the reinforcements are placed along at least two directions in a
single plane
Note 1 to entry: See Figure 2.
2 © ISO 2017 – All rights reserved
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oSIST prEN ISO 19634:2021
ISO 19634:2017(E)
Key
1 direction of the greater fraction of reinforcement
2 direction perpendicular to direction 1 in the plane of reinforcement (not necessarily a direction of
reinforcement)
3 direction perpendicular to the plane of reinforcement
NOTE Strictly more than one direction of fibrous reinforcement, all contained within one plane [in the present
case, three directions of reinforcement in plane (1,2)].
When several directions have an equal fraction of reinforcement, it shall be stated which direction is chosen
as direction 1 in relation to the reinforcement structure (for example, orthogonal reinforced fabric: warp in
direction 1, weft in direction 2).
Figure 2 — Schematic diagram of a 2D material
3.5
multidirectional ceramic matrix composite
xD (2 < × ≤3) material
ceramic matrix composite (3.1), where the reinforcement is spatially distributed in at least three
directions not in a single plane
Note 1 to entry: See Figures 3 and 4.
© ISO 2017 – All rights reserved 3
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oSIST prEN ISO 19634:2021
ISO 19634:2017(E)
Figure 3 — Schematic diagram of a xD (2 < × ≤ 3) material
Key
1 direction of the greater fraction of reinforcement
2 direction perpendicular to direction 1
3 direction perpendicular to the plane containing directions 1 and 2
When several directions have equal fraction of reinforcement, it shall be stated which direction is chosen as direction
1, in relation to the reinforcement structure. When it is possible to define a plane of reinforcement, direction 2 will
be chosen in this plane perpendicular to direction 1 (direction 2 is not necessarily a direction of reinforcement), and
direction 3 will be perpendicular to the plane containing directions 1 and 2. When it is not possible to define a plane
of reinforcement, direction 2 is chosen arbitrarily, but perpendicular to direction 1 and shall be clearly identified.
Figure 4 — Schematic diagram of a 3D material
4 Symbols
The symbols used for the various mechanical and thermal quantities are given in Tables 1 to 4.
4 © ISO 2017 – All rights reserved
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oSIST prEN ISO 19634:2021
ISO 19634:2017(E)
© ISO 2017 – All rights reserved 5
Table 1 — Symbols related to physical quantities
Quantity Symbol Definition Unit Remark
3
Density ρ Ratio of the mass of a body to its volume kg/m
3
Apparent density ρ Ratio of the mass of the body to its total volume kg/m
a
3
Bulk density ρ Ratio of the mass of the dry material of a po- kg/m Bulk volume = sum of volumes of solid ma-
b
rous body to its volume terial, open pores and closed pores
Ratio of the mass of a multifilament tow to
Linear density t tex Tex is the mass in grams per 1 000 m
its length
Porosity P Ratio of the total volume of pores in a porous —
body to its total volume
Apparent porosity P Ratio of the volume of open pores to total —
a
volume
Mass m Quantity of matter in a body g
Phase volume fraction V Fractional volume of phase of type j de- —
f,j
termined from micrographs of poli
...
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