| 摘要 |
A metal matrix composite and method wherein a reinforcement preform is made by partially sintering ceramic particles and a metal matrix material is used into the preform. In one example, the resulting isotropic metal matrix composite has an ultimate tensile strength of at least 80 ksi in all directions, a high temperature strength retention of at least 85% up to 500° F., and a high temperature stiffness retention of at least 95% at temperatures up to 500° F. Preferably, the preform has an average pore size of 1-5 microns, an average interconnected porosity 35-45 vol. %, a 100% open porosity, and a flexure strength of greater than 7 ksi.
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