Preparation method of metal and ceramic composite material

Abstract

The invention discloses a metal and ceramic composite material and a preparation method of the metal and ceramic composite material and belongs to the field of composite materials. The metal and ceramic composite material consists of a metal sheath and a ceramic core rod, wherein the metal sheath is coated outside the ceramic core rod through a casting process. The method comprises the processes of ceramic core rod preparation, metal casting and composite material heat treatment, wherein the preferable materials of the metal sheath are aluminum alloy, and the materials of the ceramic core rod are aluminum oxide. The metal and ceramic composite material has the advantages that the weight is light, the bending resistance intensity is high, the deformation cannot easily occur, and good interface metallurgy combination and interface gradient effects are realized. The preparation method provided by the invention has the advantages that the sealing heat insulation is carried out after the casting completion, air in fusion metal is exhausted so that the complete metalized combination is realized between the fusion metal and the surface of the ceramic core rod, the combination intensity of the metal and ceramics is improved, and the casting defects in the metal are eliminated through a heat treatment process.

Description

technical field [0001] The invention relates to a preparation method of a metal-ceramic composite material, which belongs to the field of composite materials. Background technique [0002] In some occasions where metal structures are used, hollow metal structures are welded in order to reduce weight, such as bicycle frames, luggage pull rods, engineering beams, etc. The performance of these hollow structures directly affects the service performance and service life of the corresponding structures. If the hollow structure is made of a high-strength alloy, the cost will be high, and the hollow structure with average strength is very difficult to withstand a large impact load. It is difficult to guarantee safety. However, when using a solid metal structure in some occasions, although the solid metal structure guarantees the strength required to bear the load, there are often problems of large weight and high cost, and high self-weight will bring some safety to the performance ...

AI Technical Summary

Problems solved by technology

In some existing metal-ceramic composite materials, the metal-ceramic bonding interface is directly bonded by a binder. During use, the reliability of the structural connection is poor, especially in the case of heat, due to the metal-ceramic The thermal expansion coefficient is different, and the interface tends to fall off due to the expansion of the metal, which will greatly reduce the life cycle and safety of the material