Gel method preparation process for SiC/Al composite powder

Abstract

The invention discloses a gel method preparation process for SiC / Al composite powder. The gel method preparation process for the SiC / Al composite powder includes the following steps that a premixed solution A and a premixed solution B with certain components are obtained through wet method mixing; 7.24 parts of SiC powder is added into the premixed solution A and stirred for 2-5 min through an ultrasonic blending machine, and a slurry A is obtained; 6.73 parts of Al powder is added into the premixed solution B and stirred for 10-20 min mechanically, and a slurry B is obtained; the slurry A is added into the slurry B multiple times and mixed for 20-30 min, then catalysts-initiators for catalyzing gel component gel-clot reaction are added, the slurry is promoted to be solidified to form a wet blank, and the process is less than 30 s; after the wet blank is dried and degreased, two-phase uniformly dispersed composite powder is obtained. Instability of mechanical properties caused by enhanced phase agglomeration in the composite materials is avoided, the enhanced phase proportion in the composite powder can be adjusted within the range of 5-38 percent, and the application range is enlarged.

Description

technical field [0001] The invention relates to the field of preparation of composite powders, in particular to a gel method preparation process of SiC / Al composite powders. Background technique [0002] SiC / Al composite materials have been widely used in many fields such as electronic packaging materials and wear-resistant materials due to their excellent electrical properties, wear resistance and high temperature stability. At present, the relatively mature preparation methods of SiC / Al composite materials are high-energy ball milling method, pressure infiltration method, etc. The problems existing in the prepared composite materials are mainly due to the low yield rate of products caused by insufficient two-phase dispersion, and qualified products in the In the process of use, there are problems such as short service life, serious aging damage, and unstable performance, which seriously limit the performance and application fields of SiC / Al composite materials. Contents ...

AI Technical Summary

Problems solved by technology

At present, the relatively mature preparation methods of SiC / Al composite materials are high-energy ball milling method, pressure infiltration method, etc. The problems existing in the prepared composite materials are mainly due to the low yield rate of products caused by insufficient two-phase dispersion, and qualified products in the In the process of use, there are problems such as short service life, serious aging damage, and unstable performance, which seriously limit the performance and application fields of SiC / Al composite materials.

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