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US 6,090,343 AGranted
Triphasic composite and method for making same
AssigneeRutgers University
InventorsBernard H. Kear, Rajendra K. Sadangi, Larry E. McCandlish, Oleg Voronov
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AssigneeRutgers University
InventorsBernard H. Kear, Rajendra K. Sadangi, Larry E. McCandlish, Oleg Voronov
Estimating the term…
A method for fabricating a triphasic composite such as a WC/Co/diamond composite with a high volume fraction of diamond in a WC/Co matrix. The method involves sintering of a WC/Co powder compact to develop a porous preform, which displays some rigidity and strength, infiltrating the porous preform with a controlled distribution of carbon, and high pressure/high temperature treatment of the carbon-containing WC/Co preform to transform the carbon to diamond. The distribution of diamond in the composite can be functionally graded to provide a WC/Co core and a diamond-enriched surface, wherein all three phases form an interconnected structure in three dimensions. Such a tricontinuous structure combines high strength and toughness with superior wear resistance, making it attractive for applications in machine tools and drill bits.
A method for fabricating a tricontinuous composite having three material phases which are three-dimensionally interconnected, the interconnected material phases including a superhard phase material, a hard phase material, and a binder phase material, the superhard phase material forming approximately 10-80 volume percent of an exterior surface of the composite, the method comprising the steps of:
Dependencies are inferred from the claim text.