EN 12291:2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
   5.1 Test machine
   5.2 Load train
   5.3 Set-up for heating
   5.4 Extensometer
       5.4.1 General
       5.4.2 Mechanical extensometer
       5.4.3 Electro-optical extensometer
   5.5 Temperature measurement
   5.6 Data recording system
   5.7 Micrometers
6 Test specimens
   6.1 General
   6.2 Compression between platens
   6.3 Test specimen used with grips
7 Test specimen preparation
   7.1 Machining and preparation
   7.2 Number of test specimens
8 Test procedures
   8.1 Test set-up: temperature considerations
       8.1.1 General
       8.1.2 Controlled temperature zone
       8.1.3 Temperature calibration
   8.2 Test set-up: other considerations
       8.2.1 Displacement rate
       8.2.2 Measurement of test specimens dimensions
       8.2.3 Buckling
   8.3 Testing technique
       8.3.1 Specimen mounting
       8.3.2 Setting of extensometer
       8.3.3 Heating of test specimen
       8.3.4 Measurements
   8.4 Test validity
9 Calculation of results
   9.1 Test specimen origin
   9.2 Compression strength
   9.3 Strain at maximum compression force
   9.4 Proportionality ratio or pseudo-elastic modulus,
       elastic modulus
10 Test report
Annex A (normative) Buckling: How to proceed when
        buckling is suspected
Bibliography

This European Standard EN 12291 specifies the conditions for determination of compression properties of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 1 700 °C in air at atmospheric pressure.

This European Standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2 < x < 3), loaded along one principal axis of reinforcement.

NOTE 1In most cases, ceramic matrix composites to be used at high temperature in air are coated with an anti oxidation coating.

NOTE 2The purpose of this European standard is to determine the compression properties of a material when it is placed under an oxidizing environment but not to measure material oxidation.

Two cases are distinguished:

a) compression between platens;

b) compression using grips.