High-strength boron carbide composite material and preparation method thereof

Abstract

The invention belongs to the technical field of composite materials, and particularly relates to a high-strength boron carbide composite material and a preparation method thereof.The preparation method comprises the following steps that S1, modification of titanium boride whiskers is conducted, specifically, the titanium boride whiskers, silicon powder and a grinding aid are put into a ball milling tank, ball milling, cleaning and drying are conducted, and the modified titanium boride whiskers are obtained; s2, preparation of composite material powder: mixing phenolic resin, boron carbide powder and deionized water, performing primary ball milling, then adding the modified titanium boride whisker, performing secondary ball milling, drying, and performing tertiary ball milling to obtain the composite material powder; and S3, sintering of the composite material: pressing the powder into blocks, drying moisture, pyrolyzing in a hydrogen environment, then coating with silicon powder, and sintering in vacuum. Titanium boride whiskers are adopted as a toughening and reinforcing component to reinforce and toughen the boron carbide composite material, and a liquid phase siliconizing sintering method is adopted to immerse the silicon element into the composite material system, so that the composite material is obtained. And silicon carbide can be generated in situ in the composite material, so that composite toughening of titanium boride and silicon carbide is realized.

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