Low coefficient of thermal expansion cermet compositions

摘要

A cutting element for engaging earthern formations having a wear surface formed from a low coefficient of thermal expansion (CTE) composition including a polycrystalline diamond or polycrystalline cubic boron nitride hard phase material and a ductile phase low CTE material formed from an alloy made of Co, Ni, Fe, C, and Mn. The hard phase material is bonded to one another by the ductile phase material to form the low CTE composition.

主权项

1. A cutting element for engaging earthen formations having a wear surface formed from a low coefficient of thermal expansion composition consisting of:
a hard phase material selected from the group consisting of polycrystalline diamond and polycrystalline cubic boron nitride; and a ductile phase low coefficient of thermal expansion material formed from an alloy consisting of Co, Ni, Fe, C and Mn, wherein the hard phase material is bonded to one another by the ductile phase material to form the low coefficient of thermal expansion composition, and wherein the alloy has a coefficient of thermal expansion less than about 10 ppm/° C. within a temperature range of from 100 to 700° C.