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Method for testing density of alumina ceramic sintered body

A technology of alumina ceramics and testing method, which is applied in the direction of material analysis by measuring buoyancy, can solve the problems of cracking and tool damage in cutting tools, and achieves the effect of simple method, easy implementation and good practical application effect.

Inactive Publication Date: 2014-09-10
卢斌
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Problems solved by technology

The results show that thermal stress can cause cracks in cutting tools, and the strong periodic changes in temperature and thermal stress can promote crack growth and lead to tool damage

Method used

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  • Method for testing density of alumina ceramic sintered body
  • Method for testing density of alumina ceramic sintered body
  • Method for testing density of alumina ceramic sintered body

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Embodiment 1

[0016] A method for testing the density of an alumina ceramic sintered body, comprising the following method steps,

[0017] 1) Roughly grind the surface of the hot-pressed alumina ceramic sintered body sample, and then cut it into strips on a J507S / 2F diamond inner circle cutting machine, and cut the sample into strips with a size of 30mm×4mm×3mm ;

[0018] 2) The cut sample strips must be ground for performance testing. The grinding of the sample strips is divided into three steps: rough grinding, fine grinding and polishing. The rough grinding is carried out on a diamond grinding wheel, and the remaining Grind away the flash of graphite and materials, and grind until the surface has no obvious concave-convex feeling; then use sandpaper with a particle size of 60, 120, 240, 320 mesh and 0, 1, 2, 3, 4 metallographic sandpaper to carry out step by step Fine grinding; finally use W1 type diamond grinding paste to polish on the grinding machine until the mirror surface is reach...

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Abstract

The invention provides a method for testing density of an alumina ceramic sintered body, relating to the technical field of ceramic materials. The method comprises the following steps: 1) carrying out rough grinding on the surface of a hot-pressed alumina ceramic sintered body sample, and then cutting the sample into sample strips with dimensions of 30mm*4mm*3mm on a diamond internal cutting machine; 2) grinding the cut sample strips, and finally polishing diamond paste on a grinder until a mirror plane is obtained; 3) measuring the weights of the sample strips in the air with a photoelectric analysis balance, firstly measuring the masses of fine copper wires in distilled water, then hanging the sample strips in the distilled water with the fine copper wires, and measuring the weights of the sample strips in water with the analysis balance, thereby obtaining the density of the sintered body sample according to the Archimedes law, wherein grinding of the sample strips is divided into three steps: rough grinding, fine grinding and polishing. The method is simple, is easy to implement, can be used for accurately measuring the density of the alumina ceramic sintered body to work out a reference standard for the range of application of the alumina ceramic sintered body, and has good practical application effects.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a method for testing the density of an alumina ceramic sintered body. Background technique [0002] People generally divide the materials used in modern technology into four categories: metallic materials, inorganic non-metallic materials, polymer materials and composite materials. As an important part of inorganic non-metallic materials, ceramic materials are solid compounds of metal and non-metal elements. Ceramics are generally divided into two categories: engineering structural ceramics and functional ceramics. Because engineering structural ceramics have a series of superior properties such as: high strength, high hardness, high wear resistance, and high chemical stability, especially at high temperatures, they have high strength, high hardness, small creep, and ablation resistance. Performance gets a lot of attention. At present, countries all over the world ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/08
Inventor 卢斌
Owner 卢斌
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