Method for preparing precursory wire made from composite material of Ti alloy base enhanced by continuous SiC fibre

Abstract

A process for preparing the precursor wire of continuous SiC fibre reinforced Ti alloy-base composition includes such steps as cleaning the surface of continuous SiC fibres as basic body, winding it arround the specimen holder using Ti alloy as target material, putting it in vacuum chamber, prevacuumizing, introducing argon gas to it, rotating the basic body while preheating it, and mangnetically controlled sputtering under predefined parameters. Its advantages are high uniformity of plated layer and high adhesion between plated layer and basic body.

Description

technical field [0001] The invention relates to composite material preparation technology, in particular to a preparation method of continuous SiC fiber reinforced Ti alloy matrix composite precursor wire. Background technique [0002] The development of aviation, aerospace and space technology requires high-temperature materials to have lower density, higher strength and higher operating temperature. However, traditional high-temperature materials such as titanium alloys and nickel-based superalloys are close to their maximum operating temperature, so new high-temperature materials must be developed to meet the continuously increasing operating temperature requirements of aero-engines. At present, continuous SiC fiber-reinforced titanium-based composites are a development direction of new high-performance space structural materials. The reason is that SiC fibers have high specific strength, high specific modulus, good thermal stability, corrosion resistance and wear resista...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. For some metals (such as refractory metals), it is difficult to prepare powder; 2. The uniformity of coating thickness is poor and the bonding force is weak; 3. During the hot pressing process, powder particles of a certain shape will The surface of the fiber is damaged, which affects the performance of the composite material; 4. Due to the bonding effect, there will be a certain thickness of slurry sticking to the surface of the SiC fiber, and the colloid used may cause certain pollution to the material

The disadvantage is that it is difficult to obtain high-performance precursor filaments, which is a major problem with the current method

If the fiber reacts with the matrix during the sputtering process, the bonding force will be very good, which will cause the performance of the fiber to decline, thus affecting the performance of the composite material.

Images