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Ternary silicide high-temperature in-situ oxidation detection method

An in-situ oxidation and detection method technology, applied in the direction of weighing by removing certain components, can solve the problems of high price, large influence factors of measuring instruments, and inability to use cyclic oxidation experiments, etc., to achieve simple test equipment and overcome test High instrument requirements, intuitive and convenient Effect of high temperature oxidation resistance

Inactive Publication Date: 2009-05-20
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Considering that the Netzsch STA409C thermogravimetric analyzer is expensive; and this thermogravimetric analyzer can only be used for in-situ oxidation experiments and cannot be used for cyclic oxidation experiments. Therefore, when using this method for testing, it is greatly affected by the measuring instruments

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  • Ternary silicide high-temperature in-situ oxidation detection method
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  • Ternary silicide high-temperature in-situ oxidation detection method

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The realization steps of the present invention are as follows: (1) sample preparation: wire-cut the ternary silicide material sample into a thin slice of 13mm×4mm×1.5mm or φ9mm×1.5mm, and use an electric spark drill with a diameter of 0.8mm at the corner of the thin slice The hole of the sample is polished, washed and dried, and the surface area of ​​the sample is accurately measured. (2) Preparation for the oxidation experiment: hang the sample under a platinum-rhodium wire with a diameter of 0.5 mm and adjust the sag of the entire wire so that the sample is in the middle of the furnace. Adjust the mercury bulb of the balance so that it is in the middle position, and then calibrate and zero the balance. In an atmospheric environment, the high-temperature furnace is started and the computer program that records the change in th...

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Abstract

The invention is a method for detecting ternary silicide high temperature in situ oxidization, belonging to material high-temperature oxidization test field. And the invention hangs ternary silicide sample with round bore and measured surface area through Pt-Rh wire burnt to constant weight, where one end of the Pt-Rh wire connected with the sample extends to the middle position of a high temperature hearth and the other end is outside the hearth and connected with a Ni-Cr wire, which is hung under a cotton line, and the cotton line is fixed on a hook at an electronic balance base, the electronic balance is connected with computer data lines, and the sample is heated in the high temperature furnace, and when the temperature is up to 540 deg.C, the sample starts oxidizing and the sample mass changes and the computer continuously records the sample mass change, and reflects antioxidant property of the sample according to the change. And the method is easy to apply, and the test device is simple, not only able to be used to in situ oxidization but also able to be used to circulating oxidization, and the invention can completely visually and conveniently test high temperature antioxidant ability of ternary silicide.

Description

technical field [0001] The invention relates to a detection method used in the field of high-temperature oxidation testing of materials, in particular to a detection method for high-temperature in-situ oxidation of ternary silicides. Background technique [0002] Silicide materials have become one of the most promising high-temperature structural candidate materials due to their high melting point, relatively low density, good high-temperature creep strength, and excellent high-temperature oxidation resistance. Currently, ternary silicide materials (such as Mo- (Si-B, Mo-Nb-Si, etc.) The research on the antioxidant properties of Si-B, Mo-Nb-Si, etc.) has developed rapidly abroad and has become a hot spot, and the research results have been widely reported. In order to characterize the high-temperature oxidation resistance of ternary silicides, the temperature used in the experiment is generally high (>1000°C). The detection methods for the high-temperature oxidation resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 王方单爱党董显平孙锋吴建生
Owner SHANGHAI JIAOTONG UNIV
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