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A method for real-time measurement of material oxidation rate using a high-temperature nanoindenter

A nano-indenter, oxidation rate technology, used in testing material hardness, measuring devices, analyzing materials, etc.

Active Publication Date: 2018-10-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the defect that the prior art lacks the method for real-time monitoring of material oxidation rate at micron and nanometer levels

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  • A method for real-time measurement of material oxidation rate using a high-temperature nanoindenter
  • A method for real-time measurement of material oxidation rate using a high-temperature nanoindenter
  • A method for real-time measurement of material oxidation rate using a high-temperature nanoindenter

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Embodiment Construction

[0030] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0031] like figure 1 As shown, the method for measuring the oxidation rate of a material in real time using a high-temperature nanoindenter provided in this embodiment includes the following steps:

[0032] (a) Polishing the surface of the test piece to meet the requirements of the nanoindentation experiment. Its purpose is to improve the smoothness of the surface of the material to ensure the smooth progress of step b.

[0033] (b) Place the test piece in the stage chamber of the nanoindentation instrument, and pass a protective gas into the stage chamber so that the test piece is not oxidized, and lift the stage chamber to the target temperature, and then conduct a nanoindentation experiment on the test piece to obtain E s .

[0034] (c) reduce the feeding amount of the protective gas or stop feeding the protective gas, s...

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Abstract

The invention provides a method for measuring the material oxidation rate in real time through a high-temperature nanoindentor. The method includes the following steps of firstly, conducting a nanoindentation experiment on a test piece at target temperature to obtain the elastic modulus Es of a base body of the non-oxidized test piece, the real-time elastic modulus Er of an oxidation film-base body formed when the test piece is oxidized, and the elastic modulus Ef existing when the thickness of an oxidation film formed when the test piece is oxidized reaches a preset value; secondly, calculating the real-time oxidation film thickness d existing when the test piece is oxidized according to the Es, the Ef, the Er and the real-time indentation depth value h, and calculating the real-time oxidation rate (please see the symbol in the description) existing when the test piece is oxidized through a formula (please see the formula in the description), wherein delta t represents time interval, and delta d represents the change value of the real-time oxidation film thickness within the time interval delta t. By means of the method, the oxidation rate of the test piece under the micrometer and nanometer scale is measured in real time online, and the method has great significance in studying the surface oxidation behavior of the material under the micrometer and nanometer scale.

Description

technical field [0001] The invention relates to the technical field of engineering materials, in particular to a method for measuring the oxidation rate of materials in real time by using a high-temperature nano-indentation instrument. Background technique [0002] Materials are the foundation of human material civilization, and it supports the advancement of other new technologies. Various structural and functional materials are needed in national economic production fields such as aerospace, marine engineering, life science and system engineering. With the development of science and technology and the realization of some extreme conditions, various new materials are rapidly developed and widely used in high-tech fields, which requires more stringent requirements for the reliability and practical performance of the materials used. For example, in the field of aerospace thermal protection, with the development of engines with high thrust-to-weight ratios, the design inlet te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/40
CPCG01N3/40G01N2203/0236
Inventor 冯雪李燕方旭飞
Owner TSINGHUA UNIV