Granulation method of silicon carbide composite ceramic material

Abstract

The invention relates to a granulation method of a silicon carbide composite ceramic material. The granulation method comprises the following steps: S1, a metal material is granulated, specifically, stainless steel powder and an organic binder are put into an internal mixer, mixing is conducted for 30-180 min, then squeezing and cutting into granules are conducted, and thus metal material granulesare prepared; S2, the silicon carbide composite ceramic material is granulated, specifically, ceramic powder and an organic binder are put into the internal mixer to be mixed for 30-180 min, then themetal material granules prepared in the step S1 are added into the internal mixer, thus the mass of the metal material granules accounts for 30-35% of the total material mass in the internal mixer, after mixing continues being conducted for 30-120 min, squeezing and cutting into granules are conducted, and thus the stainless steel reinforced silicon carbide based composite ceramic granules are obtained. According to the granulation method, the metal material is granulated separately firstly, the metal material, a ceramic powder material and the organic binder are mixed in the internal mixer and subjected to squeezing granulation, the problem that the difference between the stainless steel powder and the ceramic powder is large, and consequently even mixing cannot be conducted directly issolved, a granule material with good fluidity is prepared so as to be directly injected into a billet, and the size accuracy of the billet is maintained.

Description

technical field

[0001] The invention relates to the technical field of ceramic materials, in particular to a method for granulating silicon carbide composite ceramic materials, and the granules can be used for direct injection molding or hot-press molding. Background technique

[0002] Silicon carbide ceramic materials have excellent characteristics such as high temperature strength, high temperature oxidation resistance, good wear resistance, good thermal stability, small thermal expansion coefficient, high thermal conductivity, high hardness, thermal shock resistance and chemical corrosion resistance. Automobiles, mechanical chemicals, environmental protection, space technology, information electronics, energy and other fields have increasingly wide applications, and have become an irreplaceable structural ceramic with excellent performance in many industrial fields.

[0003] Although silicon carbide ceramics have superhard wear resistance, low density (about 3.20g / mm 3 )...

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