EN ISO 18756:2005

Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of fracture toughness of monolithic ceramics at room temperature by the surface crack in flexure (SCF) method (ISO 18756:2003)

ISO 18756:2003 describes a test method that covers the determination of fracture toughness of monolithic ceramic materials at room temperature by the surface crack in flexure (SCF) method.
This International Standard is intended for use with monolithic ceramics and whisker- or particulate-reinforced ceramics that are regarded as macroscopically homogeneous. It does not include continuous-fiber reinforced ceramic composites.
The test method is applicable to materials with either flat or rising crack growth resistance curves.

Hochleistungskeramik - Bestimmung der Bruchzähigkeit monolithischer Keramik bei Raumtemperatur für Biegeproben mit Oberflächenriss (Knoop-Riss) (SCF-Verfahren) (ISO 18756:2003)

Diese Internationale Norm legt ein Prüfverfahren zur Bestimmung der Bruchzähigkeit monolithischer keramischer Werkstoffe fest, das bei Raumtemperatur an Biegeproben mit Oberflächenriss (Knoop Riss) (SCF Verfahren) durchgeführt wird.
Diese Internationale Norm ist für die Anwendung auf monolithische Keramiken und durch Whisker oder Teilchen verstärkte Keramiken vorgesehen, die makroskopisch als homogen angesehen werden. Keramische Verbundstoffe mit Endlosfaserverstärkung werden nicht erfasst.
Das Prüfverfahren ist auf keramische Werkstoffe mit flachen oder ansteigenden Risswiderstandskurven (R Kurven) anwendbar. Es ist mit dem in ISO 15732 festgelegten Verfahren vergleichbar, allerdings sind die Anrisse kleiner und werden auf andere Weise erzeugt. Beide Verfahren sollten für Werkstoffe mit flacher Risswiderstandskurve ähnliche oder identische Ergebnisse liefern.
ANMERKUNG   Das in dieser Norm festgelegte Prüfverfahren ist im Allgemeinen auf keramische Werkstoffe anwendbar, die eine Bruchzähigkeit von weniger als " 10 MPa×m1/2 haben. In Werkstoffen mit größerer Bruchzähigkeit oder in besonders weichen keramischen Werkstoffen (mit geringer Härte), z. B. einige Zirconiumoxide, oder auch in porösen keramischen Werkstoffen kann es schwierig sein, Anrisse mit einem Knoop Eindringkörper zu erzeugen.

Céramiques techniques - Détermination de la ténacité à la rupture des céramiques monolithiques à température ambiante par fissuration superficielle en flexion (ISO 18756:2003)

L'ISO 18756:2003 décrit une méthode d'essai qui couvre la détermination de la ténacité à la rupture de matériaux céramiques monolithiques, à température ambiante, par la méthode de fissuration superficielle en flexion (SCF).
L'ISO 18756:2003 est destinée à être utilisée avec des céramiques monolithiques et des céramiques à renfort de trichite ou de particules qui sont considérées comme homogènes d'un point de vue macroscopique. Elle ne couvre pas les composites céramiques à renfort de fibres continues.
La méthode d'essai est applicable aux matériaux ayant des courbes plates ou montantes de résistance à la propagation de la fissure.

Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of fracture toughness of monolithic ceramics at room temperature by the surface crack in flexure (SCF) method (ISO 18756:2003)

General Information

• Status: Published
• Publication Date: 05-Jul-2005
• Withdrawal Date: 30-Jan-2006
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: CEN/TC 184 - Advanced technical ceramics
• Drafting Committee: CEN/TC 184/WG 3 - Monolithic ceramics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Jul-2005
• Completion Date: 06-Jul-2005
• Ref Project: SIST EN ISO 18756:2005 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of fracture toughness of monolithic ceramics at room temperature by the surface crack in flexure (SCF) method (ISO 18756:2003)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 18756:2005
01-november-2005
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination
of fracture toughness of monolithic ceramics at room temperature by the surface
crack in flexure (SCF) method (ISO 18756:2003)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of
fracture toughness of monolithic ceramics at room temperature by the surface crack in
flexure (SCF) method (ISO 18756:2003)
Hochleistungskeramik - Bestimmung der Bruchzähigkeit monolithischer Keramik bei
Raumtemperatur für Biegeproben mit Oberflächenriss (Knoop-Riss) (SCF-Verfahren)
(ISO 18756:2003)
Céramiques techniques - Détermination de la ténacité a la rupture des céramiques
monolithiques a température ambiante par fissuration superficielle en flexion (ISO
18756:2003)
Ta slovenski standard je istoveten z: EN ISO 18756:2005
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST EN ISO 18756:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 18756:2005

---------------------- Page: 2 ----------------------

SIST EN ISO 18756:2005
EUROPEAN STANDARD
EN ISO 18756
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2005
ICS 81.060.30

English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Determination of fracture toughness of monolithic
ceramics at room temperature by the surface crack in flexure
(SCF) method (ISO 18756:2003)
Céramiques techniques - Détermination de la ténacité à la Hochleistungskeramik - Bestimmung der Bruchzähigkeit
rupture des céramiques monolithiques à température monolithischer Keramik bei Raumtemperatur für
ambiante par fissuration superficielle en flexion (ISO Biegeproben mit Oberflächenriss (Knoop-Riss) (SCF-
18756:2003) Verfahren) (ISO 18756:2003)
This European Standard was approved by CEN on 2 June 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18756:2005: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO 18756:2005
EN ISO 18756:2005 (E)


Foreword

The text of ISO 18756:2003 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 18756:2005 by Technical Committee CEN/TC 184 "Advanced technical ceramics", the
secretariat of which is held by BSI.

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 2006, and conflicting national
standards shall be withdrawn at the latest by January 2006.

This document is part of a series:

CEN/TS 14425-1 Advanced technical ceramics — Test methods for determination of fracture
toughness of monolithic ceramics — Part 1: Guide to test method selection

CEN/TS 14425-3 Advanced technical ceramics — Test methods for determination of fracture
toughness of monolithic ceramics — Part 3: Chevron notched beam (CNB) method

CEN/TS 14425-5 Advanced technical ceramics — Test methods for determination of fracture
toughness of monolithic ceramics — Part 5: Single-edge V-notch beam (SEVNB) method

EN ISO 15732 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method
for fracture toughness of monolithic ceramics at room temperature by single edge precracked
beam (SEPB) method

EN ISO 18756 Fine ceramics (advanced ceramics, advanced technical ceramics) —
Determination of fracture toughness of monolithic ceramics at room temperature by the surface
crack in flexure (SCF) method

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countrie
...