C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 32/00 (2006.01) B23K 35/22 (2006.01) C22C 1/10 (2006.01) C22C 29/12 (2006.01)
Patent
CA 2045811
ABSTRACT OF DISCLOSURE A silver-metal oxide composite material comprising a sil- ver matrix or silver-copper alloy matrix containing 50% by weight or less of copper, (a) from 0.5 to 25% by weight, in terms of elemental metal, of an oxide of at least one element selected from the group consisting of Mg, Al, Zr, Ca, Ce, Be, Th, Sr, Ti, Cr, Hf and Si, and, optionally, (b) from 0.01 to 5% by weight, in terms of elemental met- al, of an oxide of at least one element selected from the group consisting of Bi, Pb, Cd, Zn, Sn, Sb, Mn and iron family metals; the oxide of the (a) element and, where present, the oxide of the (b) element being dispersed in the form of fine particles with a particle size of not more than about 0.1 µm uniformly throughout the matrix from the surface to the core thereof; and process of producing the composite material using oxidation under the conditions in which a liquid phase and a solid phase coexist.
Marks & Clerk
Shibata Akira
Sumitomo Metal Industries Ltd.
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