Method for preparing low-melting-point alloy-coated ceramic-phase reinforced body/aluminum-matrix composite materials

Abstract

The invention provides a method for preparing low-melting-point alloy-coated ceramic-phase reinforced bodies / aluminum-matrix composite materials, which relates to a method for coating ceramic-phase reinforced bodies. The invention solves the problem that a sol-gel method is complex in the process of coating the surfaces of reinforced bodies with coatings. The method comprises the following steps: adding two or more than two of bismuth nitrate aqueous solution, lead nitrate aqueous solution, indium chloride aqueous solution and stannic chloride aqueous solution to dilute nitric acid solution and adding the obtained liquid mixture and ammonia solution dropwise to reinforced-body solution till the pH is between 6 and 14; preparing reinforced bodies into prefabticated pieces and preserving heat at a temperature between 350 and 1,100 DEG C; obtaining the ceramic-phase reinforced bodies coated with metal oxide; and preparing the composite materials by utilizing a squeeze casting method. The method is simple in process and shortens the production cycle of the composite materials. The damping value of the aluminum-matrix composite materials obtained by applying the method is 0.016 to 0.018 at 25 DEG C on a frequency of 70 Hz.

Description

technical field

[0001] The invention relates to a preparation process of a high-damping aluminum-based composite material. Background technique

[0002] The interface is a unique and extremely important component of aluminum matrix composites. In the research of metal matrix composites, the interface between the reinforcement and the matrix has always been the focus of attention. After years of attempts, scientists from various countries have invented a variety of The method is to apply different coatings on the surface of the reinforcement to improve the interface structure of the metal matrix composite material, so as to achieve the purpose of improving the performance of the aluminum matrix composite material. The process of coating the surface of the reinforcement with the sol-gel method is complicated, requiring two or more coatings and more than two sintering processes, which leads to a long production cycle of the composite material (about 7 days), In addition, the u...

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