ASTM C1525-18
(Test Method)Standard Test Method for Determination of Thermal Shock Resistance for Advanced Ceramics by Water Quenching
Standard Test Method for Determination of Thermal Shock Resistance for Advanced Ceramics by Water Quenching
SIGNIFICANCE AND USE
5.1 The high temperature capabilities of advanced ceramics are a key performance benefit for many demanding engineering applications. In many of those applications, advanced ceramics will have to perform across a broad temperature range with exposure to sudden changes in temperature and heat flux. Thermal shock resistance of the ceramic material is a critical factor in determining the durability of the component under transient thermal conditions.
5.2 This test method is useful for material development, quality assurance, characterization, and assessment of durability. It has limited value for design data generation, because of the limitations of the flexural test geometry in determining fundamental tensile properties.
5.3 Appendix X1 (following EN 820-3) provides an introduction to thermal stresses, thermal shock, and critical material/geometry factors. The appendix also contains a mathematical analysis of the stresses developed by thermal expansion under steady-state and transient conditions, as determined by mechanical properties, thermal characteristics, and heat transfer effects.
SCOPE
1.1 This test method describes the determination of the resistance of advanced ceramics to thermal shock by water quenching. The method builds on the experimental principle of rapid quenching of a test specimen at an elevated temperature in a water bath at room temperature. The effect of the thermal shock is assessed by measuring the reduction in flexural strength produced by rapid quenching of test specimens heated across a range of temperatures. For a quantitative measurement of thermal shock resistance, a critical temperature interval is determined by a reduction in the mean flexural strength of at least 30 %. The test method does not determine thermal stresses developed as a result of a steady-state temperature difference within a ceramic body or of thermal expansion mismatch between joined bodies. The test method is not intended to determine the resistance of a ceramic material to repeated shocks. Since the determination of the thermal shock resistance is performed by evaluating retained strength, the method is not suitable for ceramic components; however, test specimens cut from components may be used.
1.2 The test method is intended primarily for dense monolithic ceramics, but may also be applicable to certain composites such as whisker- or particulate-reinforced ceramic matrix composites that are macroscopically homogeneous.
1.3 Values expressed in this standard test method are in accordance with the International System of Units (SI) and IEEE/ASTM SI 10.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1525 − 18
Standard Test Method for
Determination of Thermal Shock Resistance for Advanced
1
Ceramics by Water Quenching
This standard is issued under the fixed designation C1525; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This test method describes the determination of the
Barriers to Trade (TBT) Committee.
resistance of advanced ceramics to thermal shock by water
quenching.Themethodbuildsontheexperimentalprincipleof
2. Referenced Documents
rapid quenching of a test specimen at an elevated temperature
2
in a water bath at room temperature. The effect of the thermal
2.1 ASTM Standards:
shock is assessed by measuring the reduction in flexural C373Test Methods for Determination of Water Absorption
strengthproducedbyrapidquenchingoftestspecimensheated
andAssociated Properties byVacuum Method for Pressed
acrossarangeoftemperatures.Foraquantitativemeasurement Ceramic Tiles and Glass Tiles and Boil Method for
of thermal shock resistance, a critical temperature interval is
Extruded Ceramic Tiles and Non-tile Fired Ceramic
determined by a reduction in the mean flexural strength of at Whiteware Products
least 30%. The test method does not determine thermal
C1145Terminology of Advanced Ceramics
stresses developed as a result of a steady-state temperature C1161Test Method for Flexural Strength of Advanced
difference within a ceramic body or of thermal expansion Ceramics at Ambient Temperature
mismatch between joined bodies. The test method is not C1239Practice for Reporting Uniaxial Strength Data and
intended to determine the resistance of a ceramic material to Estimating Weibull Distribution Parameters forAdvanced
repeated shocks. Since the determination of the thermal shock Ceramics
resistance is performed by evaluating retained strength, the C1322Practice for Fractography and Characterization of
method is not suitable for ceramic components; however, test Fracture Origins in Advanced Ceramics
specimens cut from components may be used. E4Practices for Force Verification of Testing Machines
E6Terminology Relating to Methods of MechanicalTesting
1.2 The test method is intended primarily for dense mono-
E616Terminology Relating to Fracture Testing (Discontin-
lithic ceramics, but may also be applicable to certain compos-
3
ued 1996) (Withdrawn 1996)
ites such as whisker- or particulate-reinforced ceramic matrix
IEEE/ASTM SI 10American National Standard for Metric
composites that are macroscopically homogeneous.
Practice
1.3 Values expressed in this standard test method are in
4
2.2 European Standard:
accordance with the International System of Units (SI) and
EN 820-3 Advanced Technical Ceramics—Monolithic
IEEE/ASTM SI 10.
Ceramics—Thermomechanical Properties—Part 3: Deter-
1.4 This standard does not purport to address all of the
mination of Resistance to Thermal Shock by Water
safety concerns, if any, associated with its use. It is the
Quenching
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
3. Terminology
mine the applicability of regulatory limitations prior to use.
3.1 Definitions:
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This test method is under the jurisdiction of ASTM Committee C28 on Standards volume information, refer to the standard’s Document Summary page on
Advanced Ceramics and is the direct responsibility of Subcommittee C28.01 on the ASTM website.
3
Mechanical Properties and Performance. The last approved version of this historical standard is referenced on
CurrenteditionapprovedJuly1,2018.PublishedJuly2018.Originallyapproved www.astm.org.
4
in 2002. Last previous edition approved in 2013 as C1525–04 (2013). DOI: Available from European Committee for Standardization (CEN), 36 rue de
10.1520/C1525-18. Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C1525 − 18
3.
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1525 − 04 (Reapproved 2013) C1525 − 18
Standard Test Method for
Determination of Thermal Shock Resistance for Advanced
1
Ceramics by Water Quenching
This standard is issued under the fixed designation C1525; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method describes the determination of the resistance of advanced ceramics to thermal shock by water quenching.
The method builds on the experimental principle of rapid quenching of a test specimen at an elevated temperature in a water bath
at room temperature. The effect of the thermal shock is assessed by measuring the reduction in flexural strength produced by rapid
quenching of test specimens heated across a range of temperatures. For a quantitative measurement of thermal shock resistance,
a critical temperature interval is determined by a reduction in the mean flexural strength of at least 30 %. The test method does
not determine thermal stresses developed as a result of a steady state steady-state temperature differencesdifference within a
ceramic body or of thermal expansion mismatch between joined bodies. The test method is not intended to determine the resistance
of a ceramic material to repeated shocks. Since the determination of the thermal shock resistance is performed by evaluating
retained strength, the method is not suitable for ceramic components; however, test specimens cut from components may be used.
1.2 The test method is intended primarily for dense monolithic ceramics, but may also be applicable to certain composites such
as whisker- or particulate-reinforced ceramic matrix composites that are macroscopically homogeneous.
1.3 Values expressed in this standard test method are in accordance with the International System of Units (SI) and Standard
IEEE/ASTM SI 10.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C373 Test Methods for Determination of Water Absorption and Associated Properties by Vacuum Method for Pressed Ceramic
Tiles and Glass Tiles and Boil Method for Extruded Ceramic Tiles and Non-tile Fired Ceramic Whiteware Products
C1145 Terminology of Advanced Ceramics
C1161 Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature
C1239 Practice for Reporting Uniaxial Strength Data and Estimating Weibull Distribution Parameters for Advanced Ceramics
C1322 Practice for Fractography and Characterization of Fracture Origins in Advanced Ceramics
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
3
E616 Terminology Relating to Fracture Testing (Discontinued 1996) (Withdrawn 1996)
IEEE/ASTM SI 10 Standard for Use of the International System of Units (SI): The Modern Metric SystemAmerican National
Standard for Metric Practice
1
This test method is under the jurisdiction of ASTM Committee C28 on Advanced Ceramics and is the direct responsibility of Subcommittee C28.01 on Mechanical
Properties and Performance.
Current edition approved Aug. 1, 2013July 1, 2018. Published September 2013July 2018. Originally approved in 2002. Last previous edition approved in 20092013 as
C1525 – 04 (2009).(2013). DOI: 10.1520/C1525-04R13.10.1520/C1525-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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...
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