Patent ID: 6805973
Filing Date: 2004-10-19
Classification: B22D,Y10T

Abstract:
An aluminum nitride/aluminum base composite material, which comprises:(a) a base material obtained by preparing a preform having pores, obtained by sintering aluminum nitride powder, enclosing the preform in a container provided in a molten metal pressure apparatus, pouring a molten aluminum base material into the container, and, applying pressure to the molten aluminum base material in the container to fill the aluminum base material in the pores of the perform; (b) a covering layer consisting of a ceramic material and covering a surface of the base material; and (c) an intermediate underlayer, disposed between said base material and said covering layer, said intermediate layer comprising nickel containing approximately 5% weight aluminum, wherein the base material and the covering layer satisfy the relation of (&agr;1âˆ’3)&lE;&agr;2&lE;(&agr;1+3), and wherein &agr;1 is the linear expansion coefficient of said base material and &agr;2 is the linear expansion coefficient of said covering layer [unit: 10âˆ’6/k].