TiN coating silicon carbide fiber reinforced titanium-based composite material and preparation method thereof

Abstract

The invention discloses a TiN coating silicon carbide fiber reinforced titanium-based composite material and a preparation method thereof and relates to preparation methods of a TiN coating, and a coating carbon fiber reinforced titanium-based composite material. The composite material is formed by performing vacuum hot-forming on foil and TiN coating silicon carbide fiber cloth which are alternately stacked. The preparation method comprises the following steps of: coating the TiN coating on the silicon carbide fiber cloth by magnetron sputtering technology; alternately stacking the TiN coating silicon carbide fiber cloth and the foil, and putting in a graphite mould; and performing vacuum hot-forming on the graphite mould in vacuum hot-press equipment. The TiN coating can effectively prevent the extent of the interface reaction between the silicon carbide fiber and a titanium matrix and effectively inhibit the titanium matrix element from diffusing to the fiber; the fiber is not directly reacted with the matrix; and the interfacial debonding force Pmax of the composite material is 23 to 27N and is smaller than that of a coating-free silicon carbide fiber reinforced titanium-basedcomposite material, namely 33 to 37N, and the moderate interface bonding strength is achieved.

Description

technical field [0001] The invention relates to a coated carbon fiber reinforced titanium-based composite material and a preparation method thereof. Background technique [0002] Silicon carbide fibers have good high-temperature performance, high strength, high modulus and chemical stability, and are widely used in high-tech fields such as aerospace, ships, missiles, weapons, and atomic energy. The outstanding advantage of silicon carbide fiber is high temperature resistance, which is the highest working temperature among the reinforced materials currently used. Advanced composite materials prepared with silicon carbide fiber can work at high temperature for a long time. Silicon carbide long fiber reinforced titanium matrix composites have high specific strength and specific stiffness, high service temperature, good fatigue and creep resistance, and obvious weight reduction effect. A new material that will have great application potential in the aerospace field in the futur...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a TiN-coated silicon carbide fiber-reinforced titanium-based composite material and its preparation method, which can effectively reduce the degree of interfacial reaction, obtain moderate interfacial reaction intensity, and can effectively control the element in the titanium matrix to the fiber. Diffusion-induced poor interfacial strength of TiN-coated SiC fiber-reinforced composites

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