ISO 19604:2018
Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of ceramic composites at high temperature — Determination of stress-rupture time diagram under constant tensile loading
ISO 19604:2018 specifies the conditions for determination of the stress-rupture time diagram of continuous fibre-reinforced ceramic matrix composites (including carbon fibre-reinforced carbon matrix composite) at high temperature in air, vacuum and inert gas atmospheres under constant tensile loading.
ISO 19604:2018 applies to all ceramic matrix composites with continuous fibre reinforcement: unidirectional (1D), bidirectional (2D) and tridirectional (xD, with 2 < x ≤ 3), loaded along one principal axis of reinforcement.
NOTE 1 In most cases, ceramic matrix composites to be used at high temperature in air are coated with an antioxidation coating.
NOTE 2 Since the main purpose of the test is to obtain the stress-rupture time data, the deformation measurement is not mandatory.
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Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principle
5 Significance and use
6 Apparatus
6.1 Test machine
6.2 Gripping devices
6.2.1 General
6.2.2 Active gripping devices
6.2.3 Passive gripping devices
6.3 Test chamber
6.4 Load indicator
6.5 Extensometer
6.5.1 General
6.5.2 Mechanical extensometer
6.5.3 Electronic optical extensometer
6.6 Heating apparatus
6.7 Temperature measurement devices
6.8 Data recording system
6.9 Micrometers
7 Test specimens
7.1 Test specimen geometry
7.2 End tabs of specimen
7.3 Test specimen preparation
7.4 Number of test specimens
8 Test preparation
8.1 Alignment adjustment in tensile axis direction
8.2 Adjustment of heating apparatus and temperature measuring device
8.3 Measurement of test specimen dimension
9 Test procedures
9.1 Testing technique
9.1.1 Test specimen mounting
9.1.2 Setting of extensometers
9.1.3 Setting of inert atmosphere
9.1.4 Heating the test specimen
9.1.5 Monitoring of temperature and elongation
9.1.6 Applying load
9.2 Post-testing treatment
9.3 Test validity
9.4 Stress levels in tests
9.5 Accidental interruption of the test
10 Calculation of results
10.1 Tensile applied stress
10.2 Tensile strain
10.3 Drawing of tensile strain curve
10.4 Drawing of stress-rupture diagram
11 Test report
Annex A (informative) Measurement procedure of bending ratio in the adjustment of a tensile axis
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Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principle
5 Significance and use
6 Apparatus
6.1 Test machine
6.2 Gripping devices
6.2.1 General
6.2.2 Active gripping devices
6.2.3 Passive gripping devices
6.3 Test chamber
6.4 Load indicator
6.5 Extensometer
6.5.1 General
6.5.2 Mechanical extensometer
6.5.3 Electronic optical extensometer
6.6 Heating apparatus
6.7 Temperature measurement devices
6.8 Data recording system
6.9 Micrometers
7 Test specimens
7.1 Test specimen geometry
7.2 End tabs of specimen
7.3 Test specimen preparation
7.4 Number of test specimens
8 Test preparation
8.1 Alignment adjustment in tensile axis direction
8.2 Adjustment of heating apparatus and temperature measuring device
8.3 Measurement of test specimen dimension
9 Test procedures
9.1 Testing technique
9.1.1 Test specimen mounting
9.1.2 Setting of extensometers
9.1.3 Setting of inert atmosphere
9.1.4 Heating the test specimen
9.1.5 Monitoring of temperature and elongation
9.1.6 Applying load
9.2 Post-testing treatment
9.3 Test validity
9.4 Stress levels in tests
9.5 Accidental interruption of the test
10 Calculation of results
10.1 Tensile applied stress
10.2 Tensile strain
10.3 Drawing of tensile strain curve
10.4 Drawing of stress-rupture diagram
11 Test report
Annex A (informative) Measurement procedure of bending ratio in the adjustment of a tensile axis