Composite materials comprising a hard ceramic phase and a Cu-Ni-Sn alloy
AssigneeKennametal Inc.
InventorsArunkumar Shamrao Watwe, Harold E. Kelley
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Abstract
Composite materials comprising a hard ceramic phase and an infiltration alloy are disclosed. The hard ceramic phase may comprise a carbide such as tungsten carbide and/or cast carbide. The infiltration alloy is Cu-based and comprises Ni and Sn. The infiltration alloy may further include Nb, and may be substantially free of Mn. The composite material may be heat treated in order to improve its mechanical properties. For example, the composition of the Cu—Ni—Sn infiltration alloy may be selected such that its hardness, wear resistance, toughness and/or transverse rupture strength are improved after the composite material is solutioned and aged at elevated temperatures.
Claims4
A composite material comprising:
- from about 60 to about 80 weight percent hard ceramic particles;
- and
- from about 20 to about 40 weight percent of a thermally aged Cu-based infiltration alloy comprising Ni, Sn, and Nb contacting the hard ceramic particles, wherein the thermally aged Cu-based infiltration alloy is a spinodal alloy and is substantially free of Mn, the Cu comprises from about 80 to about 85 weight percent of the thermally aged Cu-based infiltration alloy, the Ni comprises from about 8 to about 12 weight percent of the thermally aged Cu-based infiltration alloy, the Sn comprises from about 5 to about 12 weight percent of the thermally aged Cu-based infiltration alloy, and the Nb comprises from about 0.1 to about 1 weight percent of the thermally aged Cu-based infiltration alloy.
Dependencies are inferred from the claim text.