SIST EN 820-2:2004

SLOVENSKI STANDARD
SIST EN 820-2:2004
01-januar-2004
1DGRPHãþD
SIST ENV 820-1:2000
SIST ENV 820-2:2000
Advanced technical ceramics - Methods of test for monolithic ceramics - Thermo-
mechanical properties - Part 2: Determination of self-loaded deformation
Advanced technical ceramics - Methods of testing monolithic ceramics - Thermo-
mechanical properties - Part 2: Determination of self-loaded deformation
Hochleistungskeramik - Prüfverfahren für monolithische Keramik - Thermomechanische
Eigenschaften - Teil 2: Bestimmung der Verformung unter Eigengewicht
Céramiques techniques avancées - Méthodes d'essai pour céramiques monolithiques -
Propriétés thermo-mécaniques - Partie 2: Détermination de la déformation sous son
propre poids
Ta slovenski standard je istoveten z: EN 820-2:2003
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST EN 820-2:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 820-2:2004

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SIST EN 820-2:2004
EUROPEAN STANDARD
EN 820-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2003
ICS 81.060.30 Supersedes ENV 820-2:1992
English version
Advanced technical ceramics - Methods of testing monolithic
ceramics - Thermo-mechanical properties - Part 2:
Determination of self-loaded deformation
Céramiques techniques avancées - Méthodes d'essai pour Hochleistungskeramik - Prüfverfahren für monolithische
céramiques monolithiques - Propriétés thermo-mécaniques Keramik - Thermomechanische Eigenschaften - Teil 2:
- Partie 2: Détermination de la déformation sous son propre Bestimmung der Verformung unter Eigengewicht
poids
This European Standard was approved by CEN on 2 January 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, 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
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 820-2:2003 E
worldwide for CEN national Members.

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SIST EN 820-2:2004
EN 820-2:2003 (E)
Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Term and definition.4
4 Principle.4
5 Apparatus .4
6 Test pieces.5
7 Procedure .5
7.1 Setting up of measurement gauge.5
7.2 Marking of the test pieces.5
7.3 Measurement of test pieces before heat treatment.5
7.4 Heat treatment of test pieces.5
7.5 Measurement of the test pieces after heat treatment .6
7.6 Calculation of deformation .6
8 Determination of the temperature of commencement of self-loaded deformation.6
8.1 Determination.6
8.2 Limits.6
9 Interferences.7
10 Test report .7
2

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SIST EN 820-2:2004
EN 820-2:2003 (E)
Foreword
This document (EN 820-2:2003) has been prepared by Technical Committee CEN/TC 184 "Advanced technical
ceramics", the secretariat of which is held by BSI.
This document shall be given the status of a national standard, either by publication of an identical text or by
endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latest by
October 2003.
This document supersedes ENV 820-2:1992.
EN 820 Advanced technical ceramics – Methods of testing monolithic ceramics – Thermo-mechanical properties
consists of four parts:
 Part 1: Determination of flexural strength at elevated temperatures
 Part 2: Determination of self-loaded deformation
 Part 3: Determination resistance to thermal shock by water quenching
 Part 4: Determination of flexural creep deformation at elevated temperatures
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
3

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SIST EN 820-2:2004
EN 820-2:2003 (E)
1 Scope
This European Standard specifies a method for the determination of the temperature at which the self-loaded
deformation of a ceramic test piece commences and the extent of this deformation.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 60584-1, Thermocouples - Part 1: Reference tables (IEC 60584-1:1995).
EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC
17025:1999).
ENV 1006, Advanced technical ceramics - Methods of testing monolithic ceramics - Guidance on the sampling and
selection of test pieces.
3 Term and definition
For the purposes of this European Standard the following term and definition applies.
3.1
self-loaded deformation
the property induced by heat, which results in a ceramic body being readily deformed under its own weight
4 Principle
The method involves determining whether or not test bars supported only at their ends deform at a series of
temperatures, recording any self-loaded deformation observed, and recording the results graphically. The
temperature of commencement of self-loaded deformation, taken from the graph, is reported.
This test is intended as a simple method of determining the upper use temperature of ceramic components in a
self-loaded condition. The criterion is an upper limit of fl
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