Advanced technical ceramics - Monolithic ceramics - Part 2: Oxidation test

This Part of ENV 12923 describes a simple oxidation test for advanced technical ceramics. The test is designed to give an assessment of the mass and dimensional changes of test pieces following oxidation at high temperature in an oxidizing atmosphere, and to assess whether oxidation has a significant effect on the subsequent strength, either at room temperature or at elevated temperatures.
NOTE 1 This test method does not allow definition of other mechanical performance changes resulting from high-temperature exposure, such as changes in susceptibility to subcritical crack growth, creep behaviour, migration of secondary constituents, etc.
NOTE 2 This test method does not cover the additional effects of other corrodents in the ambient atmosphere, such as salt vapours, reducing or corrosive gases, and other contaminants. This method also does not cover tests at pressures other than ambient atmospheric pressure.
NOTE 3 An interlaboratory evaluation of the procedure given in this standard is summarised in annex A.

Hochleistungskeramik - Monolithische Keramik - Teil 2: Oxidationsprüfung

Dieser Teil von ENV 12923 beschreibt eine einfache Oxidationsprüfung für Hochleistungskeramik. Die Prüfung ist so angelegt, dass sie die Beurteilung der Massen- und Maßänderung von Probekörpern nach der Oxidation bei erhöhten Temperaturen in einer oxidierenden Atmosphäre ermöglicht und dass sie erlaubt zu beurteilen, ob die Oxidation einen signifikanten Einfluss auf die spätere Festigkeit sowohl bei Raumtemperatur als auch bei erhöhten Temperaturen hat.
ANMERKUNG 1   Dieses Prüfverfahren ist nicht zur Bestimmung der Änderung anderer mechanischer Eigenschaften geeignet, wie z. B. die Änderungen der Empfindlichkeit gegen unterkritisches Risswachstum, Zeitstandverhalten, Migration von Sekundärbestandteilen usw.
ANMERKUNG 2   Dieses Prüfverfahren gilt nicht für die zusätzlichen Auswirkungen sonstiger in der Umgebungsluft vorhandener Korrosionsmittel, wie z. B. Salzsprühnebel, reduktive oder korrodierende Gase und sonstige Verunreinigungen. Dieses Prüfverfahren gilt auch nicht für Prüfungen bei vom Atmosphärendruck abweichenden Drücken.
ANMERKUNG 3   Ein Ringversuch, der zu der in dieser Norm beschriebenen Prüfung durchgeführt wurde, ist im Anhang A zusammengefasst.

Céramiques techniques avancées - Céramiques monolithiques - Partie 2: Essai d'oxydation

La présente partie de l'ENV 12923 décrit un essai d'oxydation simple pour les céramiques techniques avancées. Cet essai est conçu pour donner une évaluation des variations de masse et de dimensions des éprouvettes à la suite d'une oxydation à température élevée dans une atmosphère oxydante, ainsi que pour évaluer l'effet de l'oxydation sur la résistance mécanique ultérieure, soit à la température ambiante, soit à températures plus élevées.
NOTE 1   La présente méthode d'essai ne permet pas la définition d'autres variations de la performance mécanique résultant d'une exposition à des températures élevées, telles qu'une sensibilité à la propagation des fissures sous-critiques, un comportement de fluage, une migration des constituants secondaires, etc.
NOTE 2   La présente méthode d'essai ne couvre pas les effets additionnels d'autres agents corrosifs dans l'atmosphère ambiante, tels que les vapeurs de sel, les gaz réducteurs ou corrosifs et d'autres contaminants. Elle ne couvre pas non plus les essais à des pressions autres que la pression atmosphérique ambiante.
NOTE 3   Une évaluation interlaboratoire de la procédure préscrite dans la présente Norme est résumée à l'annexe A.

Advanced technical ceramics - Monolithic ceramics - Part 2: Oxidation test

General Information

Status
Withdrawn
Publication Date
17-Jul-2001
Withdrawal Date
17-Mar-2020
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
18-Mar-2020

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SLOVENSKI STANDARD
SIST ENV 12923-2:2002
01-januar-2002
Advanced technical ceramics - Monolithic ceramics - Part 2: Oxidation test
Advanced technical ceramics - Monolithic ceramics - Part 2: Oxidation test
Hochleistungskeramik - Monolithische Keramik - Teil 2: Oxidationsprüfung
Céramiques techniques avancées - Céramiques monolithiques - Partie 2: Essai
d'oxydation
Ta slovenski standard je istoveten z: ENV 12923-2:2001
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST ENV 12923-2:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ENV 12923-2:2002

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SIST ENV 12923-2:2002
EUROPEAN PRESTANDARD
ENV 12923-2
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
July 2001
ICS 81.060.30
English version
Advanced technical ceramics - Monolithic ceramics - Part 2:
Oxidation test
Céramiques techniques avancées - Céramiques Hochleistungskeramik - Monolithische Keramik - Teil 2:
monolithiques - Partie 2: Détermination de l'oxidation Oxidationsprüfung
This European Prestandard (ENV) was approved by CEN on 4 June 2001 as a prospective standard for provisional application.
The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the ENV can be converted into a European Standard.
CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final
decision about the possible conversion of the ENV into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, 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
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 12923-2:2001 E
worldwide for CEN national Members.

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SIST ENV 12923-2:2002
ENV 12923-2:2001 (E)
Contents
page
Foreword 3
.....................................................................................................................................
1SCOPE 4
............................................................................................................................
2 NORMATIVE REFERENCES 4
......................................................................................
3 TERMS AND DEFINITIONS 5
........................................................................................
4 BACKGROUND 5
............................................................................................................
5 INTERFERENCES 6
........................................................................................................
6 APPARATUS 8
.................................................................................................................
7 TEST PIECES 10
..............................................................................................................
8 TEST PROCEDURE 11
....................................................................................................
9 EXPRESSION OF RESULTS 13
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10 REPORT 14
.......................................................................................................................
Annex A (informative) Interlaboratory evaluation of the test procedure 16
................................
Bibliography 18
.............................................................................................................................
2

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SIST ENV 12923-2:2002
ENV 12923-2:2001 (E)
Foreword
This European Prestandard has been prepared by Technical Committee CEN/TC 184
"Advanced technical ceramics", the secretariat of which is held by BSI.
EN 12923 consists of two parts:
Part 1: General practice for undertaking corrosion tests (ENV)
Part 2: Oxidation test (ENV)
Annex A is informative.
This Prestandard includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations
of the following countries are bound to announce this European Prestandard: Austria,
Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
United Kingdom.
3

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