Patent ID: 9550341
Date: 2017-01-24
CPC Classifications: B22D,B22F,B29C,B32B,C22C,F16D,Y10T

Claim:
1. A metal matrix composite article, comprising: a cast, reinforced body, the body comprising a first region and a second region, the first region having more reinforcement than the second region; a first reinforcement component; a second reinforcement component; a metal matrix composite material occupying the second region of the body and comprising a metal matrix material and the second reinforcement component; a preform positioned in the first region of the body and infiltrated by at least the metal matrix material of the metal matrix composite material, the preform comprising a transition region of the body located outside the preform and proximate the outer surface of the preform, the transition region comprising a distribution of the second reinforcement component adjacent to the outer surface of the preform, the distribution of the second reinforcement component comprising a density increasing according to a second gradient in a direction toward the outer surface of the preform.