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Metal ceramic composite material preparation method

A composite material and cermet technology, which is applied in the field of preparation of gradient cermet composite materials, can solve the problems of stress concentration, cracks, damage to the mechanical properties of materials, etc.

Inactive Publication Date: 2015-08-26
杨文澍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are often stress concentration or pores, cracks and other defects near the interface, which seriously damage the mechanical properties of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] A method for preparing a metal-ceramic composite material, comprising the following steps:

[0016] I, prefabricated A embryo body. Using metal particles and ceramic particles as raw materials, mixing the above particle raw materials and binder according to the mass ratio of 2 to 5:1, mixing evenly and fully drying to form a mixture, and then using powder injection molding technology to prepare porous sintered embryos; The mass percentage of the mass sum of the ceramic particles in the mixture is 10-40%;

[0017] II. Prefabrication of the B embryo body, using metal particles and ceramic particles as raw materials, mixing the above powder raw materials and binder at a mass ratio of 2 to 5: 1, mixing evenly and fully drying to form a mixture, and then using powder injection molding The process prepares porous sintered blanks; wherein the mass percentage of the total mass of ceramic particles in the mixture is 50-80%;

[0018] III. Extrude the green body of A into the gr...

Embodiment 1

[0024] A method for preparing a metal-ceramic composite material, comprising the following steps:

[0025] I, prefabricated A embryo body. Al, Cu, AlN, Al 2 o 3 ,, Fe 2 o 3 Granules are used as raw materials, and the above-mentioned granular raw materials and binder are mixed uniformly according to the mass ratio of 2:1, and then mixed evenly and fully dried to form a mixture, and then the porous sintered embryo is prepared by powder injection molding technology; among them, AlN, Al 2 o 3 ,, Fe 2 o 3 The mass percentage of the mass sum of the particles in the mixture is 10%;

[0026] II. Prefabricated B embryo body, made of Al, Cu, AlN, Al 2 o 3 ,, Fe 2 o 3 Particles are used as raw materials, the above powder raw materials and binder are mixed uniformly according to the mass ratio of 2:1, then mixed evenly and fully dried to form a mixture, and then the porous sintered embryo is prepared by powder injection molding technology; among them, AlN, Al 2 o 3 ,, Fe 2 o...

Embodiment 2

[0029] A method for preparing a metal-ceramic composite material, comprising the following steps:

[0030] I, prefabricated A embryo body. Al, Fe, AlN, Al 2 o 3 ,, B 4 C granule is the raw material, mix the above-mentioned granule raw material and binder according to the mass ratio of 5:1, mix evenly and fully dry to form a mixture, and then use the powder injection molding process to prepare porous sintered embryos; among them, AlN, Al 2 o 3 ,, B 4 The mass percentage that the mass summation of C particle accounts for in the mixture is 40%;

[0031] II. Prefabricated B embryo body, with Al, Fe, AlN, Al 2 o 3 ,, B 4 C particles are used as raw materials, the above powder raw materials and binder are mixed evenly according to the mass ratio of 5:1, and then mixed evenly and fully dried to form a mixture, and then the porous sintered embryo is prepared by powder injection molding technology; among them, AlN, Al 2 o 3 ,, B 4 The mass percentage that the mass summation ...

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Abstract

The invention discloses a squeeze casting method which is adopted to prepare a metal-based ceramic composite material so as to achieve the purposes of simplifying process and reducing cost. Due to the fact that ceramic particles are evenly distributed in metal particles, the capacity of resisting impact load effect of the metal-based ceramic composite material can be effectively improved. In addition, due to the fact that ceramic is a good heat insulation material and metal has good heat conducting performance, the metal-based ceramic composite material prepared by combining the ceramic and the metal has good thermal conductivity and lower coefficient of thermal expansion.

Description

【Technical field】 [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to a preparation method of gradient metal-ceramic composite materials. 【Background technique】 [0002] Metal-ceramic composite materials are composite materials composed of one or several ceramic phases and metal phases or alloys (also called matrix). The ceramic phase in cermets is an oxide or refractory compound with high melting point and high hardness, and the metal phase is mainly transition elements (iron, cobalt, nickel, chromium, tungsten, molybdenum, etc.) and their alloys. According to the different percentages of each constituent phase, cermets are divided into two types: ceramic-based and metal-based. Metal-ceramic composite materials have the advantages of both metal and ceramics. It has low density, high hardness, wear resistance, good thermal conductivity, and will not be brittle due to sudden cooling or sudden heat. Cermet not only has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02B22D23/04
Inventor 杨文澍
Owner 杨文澍
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