Patent ID: 6228185
Filing Date: 2001-05-08
Classification: C22C

Abstract:
A process for making an aluminum-based metal matrix alloy having titanium diboride ceramic particles dispersed therein comprising,(a) carrying out a reaction within an aluminum-based melt of(i) a salt which reacts with aluminum to produce boron; and(ii) one or more salts which react with aluminum to produce boride-forming metal;the weight ratio of titanium to boron in said melt being greater than 2.2:1 and no more than about 2.5:1;(b) maintaining the temperature of said melt below about 1000.degree. C. throughout said reaction;(c) carrying out said reaction under conditions such that said melt remains fluid during said reaction; and(d) casting said melt following said reaction to produce said aluminum-based metal matrix alloy.