Method for indirectly testing high-temperature strength of ultra-high temperature ceramic material

A technology of ultra-high temperature ceramics and high-temperature strength, which is applied in the direction of analysis of materials, material thermal analysis, and measuring devices, which can solve the problems of inability to predict the high-temperature strength of ultra-high-temperature ceramic materials, and achieve reliable prediction results

Inactive Publication Date: 2015-03-04
CHONGQING UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an indirect test method for the high-temperature strength of ultra-high-temperature ceramic materials, which can solve the problem that the high-temperature strength of ultra-high-temperature ceramic materials cannot be predicted under existing conditions, and can predict the high-temperature strength at various temperatures

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  • Method for indirectly testing high-temperature strength of ultra-high temperature ceramic material
  • Method for indirectly testing high-temperature strength of ultra-high temperature ceramic material
  • Method for indirectly testing high-temperature strength of ultra-high temperature ceramic material

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Embodiment

[0048] Take titanium carbide (TiC) ceramic material as example, implement this material high-temperature strength to predict, in conjunction with this example illustrate the concrete prediction step of the present invention:

[0049] 1. Test the experimental data of the elastic modulus of ultra-high temperature ceramic materials as a function of temperature and the material strength and elastic modulus at the reference temperature

[0050] The experimental test of the change of elastic modulus with temperature adopts the mechanical performance testing device and method disclosed in the Chinese patent document CN 102944466A for ultra-high temperature oxidation environment. The TiC ceramic specimen is installed on the testing device, and the furnace door of the high-temperature furnace is closed. Heating to different predetermined temperatures, keeping warm, loading, recording the experimental data of the load and the elongation of the specimen, and obtaining the data of the elas...

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Abstract

The invention discloses a method for indirectly testing high-temperature strength of an ultra-high temperature ceramic material. The method comprises the following steps: establishing a mathematical model between the material strength and elasticity modulus under different temperatures according to the experimental data of the measured elasticity modulus of the ultra-high temperature ceramic material along with temperature change and the material strength and elasticity modulus under a reference temperature, and calculating the high-temperature strength of the material at the temperature which corresponds to the elasticity modulus of the ultra-high temperature ceramic material. The method disclosed by the invention has the technical effects that reliable prediction of the high-temperature strength of the material at each temperature is realized.

Description

technical field [0001] The invention relates to a method for testing the strength of ultra-high temperature ceramic materials. Background technique [0002] Ultra High Temperature Ceramics (UHTCs for short) refers to the most heat-resistant high-grade ceramics that can still be used as usual in the presence of oxygen above 2000°C. It is mainly used in thermal protection systems of aircraft such as hypersonic missiles and space shuttles, such as wing leading edges, end caps and hot ends of engines. [0003] The high-temperature strength mentioned in this patent application refers to the strength of the material at a temperature ranging from 1200°C to 3200°C. The high-temperature strength of ultra-high-temperature ceramic materials, which are used as thermal protection materials for hypersonic aircraft, is an important parameter to measure the reliability of materials. Improving the high-temperature strength of ultra-high-temperature ceramic materials has always been the goa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00
Inventor 李卫国麻建坐李定玉成天宝王如转张先贺方岱宁
Owner CHONGQING UNIV
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