Cast composite material having a matrix containing a stable...

Details Cast composite material having a matrix containing a stable... Cast composite material having a matrix containing a stable...

C - Chemistry, Metallurgy

22

C

C22C 1/10 (2006.01) C22C 21/00 (2006.01) C22C 32/00 (2006.01) C22C 49/06 (2006.01)

Patent

CA 2063726

2063726 9102098 PCTABS00003 A cast composite material is prepared from a modified aluminum-containing matrix and reinforcement particles mixed into the matrix. From about 15 to about 130, preferably from about 20 to about 50, parts per million of an element, preferably beryllium, that forms a more stable oxide than magnesium oxide is included in the matrix alloy. The stable-oxide-forming element reduces the amount and thickness of the aluminum oxide and other oxides formed at the surface of the melt, which otherwise may be mixed into the melt to cause microstructural irregularities in the matrix of the cast composite material.

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