Cast composite material having a matrix containing a stable oxid

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

1990-04-30

1991-12-31

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

B22D 1914

Patent

active

050763407

ABSTRACT:
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.

REFERENCES:
patent: 4759995 (1988-07-01), Skibo et al.
patent: 4871008 (1989-10-01), Dwivedi et al.

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