Preparation method of ceramic-metal composite material

Abstract

The invention discloses a preparation method of a ceramic-metal composite material. The preparation method comprises the following steps of (1), granulating, wherein 316L stainless steel powder, blackzirconia ceramic powder and a binder are mixed and granulated correspondingly to prepare a 316L stainless steel feeding material and a black zirconia ceramic feeding material; (2) forming, wherein the 316L stainless steel feeding material is subjected to injection molding, then a 316L stainless steel injection blank is cut to be in a required shape and size by a laser cutting machine, and the cutpart comprises a sprue; and the cut 316L injection blank is placed on a mold, and then the black zirconia ceramic feeding material is used for filling the part which is cut off by laser; (3) sintering, wherein catalytic degreasing and sintering are carried out on the ceramic and the metal injection blank; and (4), polishing, wherein the sintered ceramic-metal connecting part is ground and polished. The ceramic metal composite material prepared by the technical scheme has the characteristics of being high in ceramic strength, resistant to scratching, resistant to wearing, good in heat dissipation performance, almost free of signal shielding characteristics, good in metal ductility, resistant to falling and easy to machine.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a ceramic-metal composite material. Background technique [0002] Among modern engineering structural materials, ceramic materials have excellent properties such as high temperature resistance, wear resistance, corrosion resistance, low high temperature creep, high strength, almost no signal shielding, and small thermal expansion coefficient. However, due to the characteristics of chemical bonds, they are brittle and difficult to process. Difficult and poor resistance to cold and heat shocks, which makes it difficult to make structural parts with complex shapes, which limits its scope of use. Metal materials have excellent properties such as good ductility and good thermal and electrical conductivity, but their poor wear resistance and high temperature resistance make them unable to meet the increasing performance requirements. One of the wa...

AI Technical Summary

Problems solved by technology

Among them, the use conditions of mechanical connection and adhesive connection technology are limited. Once the loading conditions are complicated and the use temperature is high, the connection joint will be damaged; in brazing connection, the required solder quality is high, and the solder used must be guaranteed to be of high quality. Improve the wettability of the surface of ceramic materials. In addition, the difference in mechanical properties and physical properties of ceramics and metal materials is also a major factor affecting brazing; the process of solid phase diffusion bonding is complicated, and its processing requirements for connecting equipment and connecting surfaces are very high. high

For example, Chinese patent CN102219539A discloses a reaction diffusion connection method between ceramic composite materials and metals. This method generates combustion reaction heat under the activation of an electric field, respectively locally melts metal materials and ceramic composite materials and generates diffusion to connect, This requires high-quality equipment, and the surface treatment of ceramic materials is complex and costly

Images