Preparation method of Al-Mg-B ceramic material
A ceramic material, aluminum magnesium boron technology, applied in the preparation and application of special ceramic composite materials, can solve the problems of easy introduction of impurities, limited application scope, difficult control, etc.
Inactive Publication Date: 2014-07-02
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0002] Aluminum-magnesium-boron ceramic materials have the characteristics of high hardness, good wear resistance, and good chemical stability. They are often used in military equipment and mechanical equipment with high mechanical properties. However, due to the low toughness of aluminum-magnesium-boron materials, its application range is limited.
[0003] At present, the methods for preparing aluminum-magnesium-boron ceramic materials include mechanical alloying hot-pressing sintering method, heat treatment method, crystallization deposition method, and metal salt preparation method; Iron pollution is large, the process is complicated and difficult to control; the heat treatment method consumes high energy, high cost, easy to introduce impurities, and low microhardness; although the devitrification deposition method and the metal salt preparation method have high purity, they can also avoid raw materials due to high temperature for a long time. The impurity phase generated by heat treatment has high energy consumption, long cycle and high cost; although the above methods can also prepare aluminum-magnesium-boron ceramic materials, there are many technical deficiencies and drawbacks
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[0071] The present invention will be further described below in conjunction with accompanying drawing:
[0072] figure 1 As shown, it is a state diagram of heating, pressurizing and sintering of aluminum-magnesium-boron ceramic materials. The position and connection relationship of each part must be correct, and the ratio should be adjusted according to the amount and operation in sequence.
[0073] Quantities of chemicals used in preparation are determined in pre-set ranges in grams, milliliters, centimeters is the unit of measurement.
[0074] The synthesis and sintering of aluminum-magnesium-boron ceramic materials is carried out in a vertical sintering furnace, which is completed under vacuum, heating, pressure, and sintering;
[0075] The sintering furnace is a vertical type. The bottom of the sintering furnace 1 is the furnace base 2, and the top is the top cover 3. A pressure motor 6 is arranged on the upper part of the top cover 3. A copper electrode workbench ...
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Abstract
The invention relates to a preparation method of an aluminum-magnesium-boron ceramic material, which uses aluminum powder, magnesium powder, and boron powder as raw materials, anneals the boron powder, mixes the powder in proportion, mechanically alloys, pre-presses, activates the electric field and heats it at high temperature. Aluminum-magnesium-boron ceramic material block is made by pressing and sintering. The metallographic structure of the aluminum-magnesium-boron ceramic material block is good, the hardness reaches 27.2GPa, the fracture toughness reaches 3MPa·m0.5, and the surface friction coefficient is 0.45~0.55. This preparation method Advanced technology, detailed and accurate data, safe and reliable, low energy consumption, no pollution to the environment, is an ideal method for preparing aluminum-magnesium-boron ceramic materials.
Description
technical field [0001] The invention relates to a method for preparing an aluminum-magnesium-boron ceramic material, which belongs to the technical field of preparation and application of special ceramic composite materials. Background technique [0002] Aluminum-magnesium-boron ceramic materials have the characteristics of high hardness, good wear resistance, and good chemical stability. They are often used in military equipment and mechanical equipment with high mechanical properties. However, due to the low toughness of aluminum-magnesium-boron materials, their application is limited. scope. [0003] At present, the methods for preparing aluminum-magnesium-boron ceramic materials include mechanical alloying hot-pressing sintering method, heat treatment method, crystallization deposition method, and metal salt preparation method; Iron pollution is large, the process is complicated and difficult to control; the heat treatment method consumes high energy, high cost, easy t...
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IPC IPC(8): C04B35/58C04B35/622C04B35/64
Inventor 刘雯闫建新温卫中王强苗洋孟庆森
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY