Patent ID: 6171989
Filing Date: 2001-01-09
Classification: A44C,C04B,G04B

Abstract:
A silver-colored sintered product containing at least titanium, carbon and boron as constituent elements and having a flexural strength of not smaller than 700 MPa, a Vickers' hardness of not smaller than 9.0 GPa and a fracture toughness of not smaller than 5.0 MPa.multidot.m.sup.1/2, wherein the sintered product comprises a metal boride phase represented by the following composition formula (I) and a metal carbide phase represented by the following composition formula (II),(Ti.sub.a M.sub.b)B.sub.c, (I)(Ti.sub.x N.sub.y)C.sub.z, (II)wherein M and N denote, respectively, at least one of the elements selected from the elements of the Groups 4a, 5a and 6a of periodic table but excluding Ti, and a, b, c, x, y and z satisfy the following relations:0.8.ltoreq.a.ltoreq.1.00.ltoreq.b.ltoreq.0.20.8.ltoreq.c.ltoreq.1.0a+b=10.8.ltoreq.x.ltoreq.1.00.ltoreq.y.ltoreq.0.20.6.ltoreq.z.ltoreq.1.0x+y=1,and wherein the total amount of the metal boride phase and the metal carbide phase is at least 75% by weight of the sintered product.