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GB/T 39686-2020: Test method for determining elastic modulus and strength of thick ceramic coatings
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39686-2020 | English | 149 |
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Test method for determining elastic modulus and strength of thick ceramic coatings
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GB/T 39686-2020
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Basic data | Standard ID | GB/T 39686-2020 (GB/T39686-2020) | | Description (Translated English) | Test method for determining elastic modulus and strength of thick ceramic coatings | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q32 | | Classification of International Standard | 81.060.30 | | Word Count Estimation | 8,892 | | Date of Issue | 2020-12-14 | | Date of Implementation | 2021-07-01 | | Quoted Standard | GB/T 16491; GB/T 21389 | | Regulation (derived from) | National Standard Announcement No. 28 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the terms and definitions, principles, equipment, samples, tests, calculations, and test reports of the test method for testing the elastic modulus and strength of ceramic thick coatings (>30um) by the three-point bending method at room temperature. This standard applies to the determination of the elastic modulus and strength of ceramic thick coatings on metal or ceramic substrates. Other hard and brittle thick coatings (elastic modulus greater than 60 GPa) can be used as reference. | GB/T 39686-2020: Test method for determining elastic modulus and strength of thick ceramic coatings
---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 elastic modulus and strength of ceramic thick coating)
ICS 81:060:30
Q32
National Standards of People's Republic of China
Test method for elastic modulus and strength of ceramic thick coating
ceramiccoatings
2020-12-14 release
2021-07-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
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):
Drafting organizations of this standard: China Building Materials Inspection and Certification Group Co:, Ltd:, Shenzhen 863 New Material Technology Co:, Ltd:,
Foshan Quality Metrology Supervision and Testing Center, Zhengzhou Dezhong Corundum Material Co:, Ltd:, Shanghai Pu Gong Testing Technology Co:, Ltd:, China Branch
Shanghai Institute of Ceramics, Guangzhou Jintai Technology Co:, Ltd:, Beijing Tianshan New Material Technology Co:, Ltd:, Shandong Industrial Ceramics Research Institute
Research Design Institute Co:, Ltd:
The main drafters of this standard: Bao Yiwang, Wan Detian, Tian Yuan, Chen Shou, Wang Xin, Liu Shu, Lu Hongwei, Mi Yuxiao, Zeng Yi, Su Dongyi, Chen Yaju,
Liu Xiaogen, Ma Delong, Qiu Yan, Wang Yanping, Pan Ruina, Sun Yukang, Chen Changzhu:
Test method for elastic modulus and strength of ceramic thick coating
1 Scope
This standard specifies the test method for testing the elastic modulus and strength of ceramic thick coatings ( >30μm) by the three-point bending method at room temperature:
Language and definitions, principles, equipment, samples, tests, calculations and test reports:
This standard applies to the determination of the elastic modulus and strength of ceramic thick coatings on metal or ceramic substrates, and other hard and brittle thick coatings (elastic modulus):
Amount greater than 60GPa) can refer to use:
2 Normative references
The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article
Pieces: For undated references, the latest version (including all amendments) applies to this document:
GB/T 16491 Electronic Universal Testing Machine
GB/T 21389 Vernier, belt meter and digital caliper
3 Terms and definitions
The following terms and definitions apply to this document:
3:1
Fracturestrengthofcoating
The average tensile stress of a beam sample containing a single-sided coating when the coating fails under bending load:
3:2
Modulus ratio modulusratio
The ratio of the elastic modulus of the coating to the elastic modulus of the substrate:
3:3
Thickness ratio
The ratio of coating thickness to substrate thickness:
3:4
Deflection ratio deflectionratio
In a three-point bending test with a given load and span, the deflection ratio of the same sample before and after the coating is prepared:
4 Principle
The three-point bending test method was used to measure the same sample under the same conditions before preparing the coating (substrate sample) and after preparing the coating (repeated
The deflection of the combined sample), the ratio of the two deflection reflects the difference in elastic modulus of the sample: The elastic modulus of the coating can be determined by the deflection ratio and the sample
The size is calculated: After obtaining the elastic modulus of the coating, load the coated sample until the coating breaks to obtain its critical load:
The critical load when the layer fractures and the sample size are calculated to obtain the coating fracture strength:
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