SIST ENV 1007-6:2007

SLOVENSKI STANDARD
01-januar-2007
6RGREQDWHKQLþQDNHUDPLND.HUDPLþQLNRPSR]LWL3UHVNXVQHPHWRGH]DRMDþLWYH
GHO'RORþDQMHQDWH]QLKODVWQRVWLYODNHQSULYLVRNLWHPSHUDWXUL
Advanced technical ceramics - Ceramic composites - Methods of test for reinforcements
- Part 6: Determination of tensile properties of filament at high temperature
Hochleistungskeramik - Keramische Verbundwerkstoffe - Verfahren zur Prüfung der
Faserverstärkungen - Teil 6: Bestimmung der Zugeigenschaften von Fasern bei hoher
Temperatur
Céramiques techniques avancées - Céramiques composites - Méthodes d'essai pour
renforts - Partie 6: Détermination des propriétés en traction du filament a haute
température
Ta slovenski standard je istoveten z: ENV 1007-6:2002
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN PRESTANDARD
ENV 1007-6
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
August 2002
ICS 81.060.30
English version
Advanced technical ceramics - Ceramic composites - Methods
of test for reinforcements - Part 6: Determination of tensile
properties of filament at high temperature
This European Prestandard (ENV) was approved by CEN on 13 July 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, Malta, 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
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 1007-6:2002 E
worldwide for CEN national Members.

Contents
Foreword.4
1 Scope .4
2 Normative references .4
3 Principle.5
4 Definitions and symbols .5
5 Apparatus .7
5.1 Test machine .7
5.2 Load train.7
5.3 Adhesive .7
5.4 Test chamber.7
5.4.1 Gas atmosphere.7
5.4.2 Vacuum chamber .7
5.5 Set-up for heating .7
5.6 Temperature measurement.7
5.7 Data recording system .7
5.8 Travelling microscope, or other suitable measuring device.8
6 Hot end method.8
6.1 Test specimens .8
6.2 Test specimen preparation .8
6.3 Number of test specimens.8
6.4 Test Procedure.9
6.4.1 Test set-up : determination of the temperature profile.9
6.4.2 Test set-up : other considerations.9
6.4.3 Testing technique .9
6.5 Calculation of results .12
6.5.1 Calculation of the load train compliance, C .12
l
6.5.2 Tensile strength .13
6.5.3 Elastic modulus.13
6.5.4 Tensile strain at failure.13
6.5.5 Test report .14
7 Cold end method.14
7.1 Method A.14
7.1.1 Principle of the method.14
7.1.2 Test specimens .14
7.1.3 Test specimen preparation .14
7.1.4 Number of test specimens.15
7.1.5 Test Procedure.15
7.1.6 Testing technique .15
7.1.7 Calculation of results .16
7.1.8 Test report .17
7.2 Method B.18
7.2.1 Principle of the method.18
7.2.2 Test specimens .18
7.2.3 Test specimen preparation .18
7.2.4 Number of test specimens.18
7.2.5 Test Procedure.18
7.2.6 Testing technique .19
7.2.7 Calculation of results .20
7.2.8 Test report .22
Annex A (Informative) Principle of method A (from R. Paar, P. Bonnel, M. Steen; Advanced Composite
Letters, 1998, Vol. 7, N° 3, pp. 69-73) .23
Annex B (Informative) Principle of method B.25
Bibliography .27
Foreword
This European Prestandard (ENV 1007-6:2002) has been prepared by Technical Committee CEN/TC 184
"Advanced technical ceramics", the secretariat of which is held by BSI.
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, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This European Prestandard specifies the conditions for measurement of tensile properties of single filament of
ceramic fibres at high temperature in air or inert atmosphere (vacuum or controlled atmosphere). The method
applies to continuous ceramic filaments taken from tows, yarns, staple fibre, braids and knitting, which have strain
to fracture less or equal to 5 % and show linear elastic behaviour to fracture.
The method does not apply to testing for homogeneity of strength properties of fibres, nor to assess the effects of
volume under stress. Statistical aspects of fibre failure are not included.
Two methods are proposed depending on the temperature of the filament end :
 Hot end method.
NOTE Current experience with this technique is limited to 1300 °C, because of the application temperature of ceramic
glue.
This method allows determination of tensile strength, of Young's modulus and of the stress strain curve.
 Cold end method.
NOTE This method is limited to 1700 °C in air and 2000 °C in inert atmosphere because of the limits of furnaces.
2 Normative references
This European Prestandard 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
Prestandard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies.
ENV 843-5, Advanced technical ceramics – Monolithic ceramics – Mechanical tests at room temperature –
Part 5 : Statistical analysis.
ENV 1007-3, Advanced technical ceramics - Ceramic composites - Methods of test for reinforcements
Part 3 : Determination of filament diameter.
EN 1007-4, Advanced technical ceramics - Ceramic composites - Methods of test for reinforcements
Part 4 : Determination of tensile properties of filament at ambient temperature.
EN 10002-2, Metallic materials – Tensile testing – Part 2 : Verification of the force measuring system of the tensile
testing machine.
EN 60584-1, Thermocouples – Part 1 : Reference tables.
EN 60584-2, Thermocouples - Part 2 : Tolerances.
3 Principle
A ceramic filament is heated to the test temperature and loaded in tension. The test is performed at constant
force/displacement rate up to failure. Force and cross-head displacement are measured and recorded
simultaneously. When required, the elongation is derived from the cross-head displacement using a compliance
correction. The test duration is limited to reduce time dependent effects.
Subjecting the whole length of a fibre to temperatures well above 1000 °C makes it difficult to fix the ends of the
specimen into appropriate temperature proof extensions. In high temperature cold-end tests this problem is
avoided by keeping the junction at the ends of the test specimen at room temperature, allowing organic resins to be
used like in the room temperature tests (EN 1007-4).
Two methods can thus be used :
 one consist
...