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GB/T 37246-2018: Test method for thermal-shock resistance of fine ceramics
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 37246-2018 | English | 119 |
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Test method for thermal-shock resistance of fine ceramics
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GB/T 37246-2018
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Basic data | Standard ID | GB/T 37246-2018 (GB/T37246-2018) | | Description (Translated English) | Test method for thermal-shock resistance of fine ceramics | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q32 | | Classification of International Standard | 81.060.30 | | Word Count Estimation | 6,681 | | Date of Issue | 2018-12-28 | | Date of Implementation | 2019-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37246-2018: Test method for thermal-shock resistance of fine ceramics---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method for thermal--shock resistance of fine ceramics
ICS 81.060.30
Q32
National Standards of People's Republic of China
Test method for thermal shock resistance of fine ceramics
Published on.2018-12-28
2019-09-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Building Materials Federation.
This standard is under the jurisdiction of the National Industrial Ceramics Standardization Technical Committee (SAC/TC194).
This standard was drafted. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shandong Industrial Ceramics Research and Design Institute Co., Ltd., Shanghai Huaxunxin
Material Technology Co., Ltd., China Building Materials Inspection and Certification Group Co., Ltd.
The main drafters of this standard. Wang Xingang, Lu Jiashen, Gao Jianhua, Li Lei, Wu Ping, Chen Changzhu, Wan Detian, Jiang Danyu.
Test method for thermal shock resistance of fine ceramics
1 Scope
This standard specifies the terms and definitions, principles, instruments, and tests for characterizing the thermal shock resistance of fine ceramics by bending strength attenuation.
Samples, test procedures, thermal shock resistance calculations and test reports.
This standard applies to the performance evaluation and design of fine ceramic materials.
Note 1. There are 3 commonly used thermal shock test methods, namely rapid cooling method, rapid heating method and rapid heating and cooling method. Ceramics are sensitive to tensile stress and surface defects are
A source of crack propagation will result in a decrease in strength. The rapid cooling method produces the maximum tensile stress on the ceramic surface, which is the most demanding test condition for ceramics. because
Therefore, this standard uses the rapid cooling method.
Note 2. In many thermal shock test methods, liquid or gas is required as the cooling medium, and the liquid has better cooling effect than the gas. Therefore, this standard uses water.
For cooling media.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1216 outer diameter micrometer
GB/T 6569 Fine ceramic bending strength test method
GB/T 17991 fine ceramic terminology
GB/T 21389 cursor, table and digital caliper
3 Terms and definitions
The following terms and definitions as defined in GB/T 17991 apply to this document.
3.1
Thermal shock thermalshock
The phenomenon of thermal stress generated by the material during rapid temperature change.
3.2
Thermal shock temperature difference thermal-shocktemperaturedifference
The temperature difference between the test temperature and the cooling medium during the thermal shock test.
3.3
Residual bending strength residualbendingstrength
The bending strength of the material after the thermal shock test.
3.4
Bending strength decay rate decayratioofbendingstrength
The ratio of the attenuation of the bending strength after the thermal shock test to the bending strength before the test.
The bending strength decay rate σ* is calculated by the formula (1).
σ* =
Σmo-σmth
Σmo
(1)
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