Patent ID: 8871340

Claim:
A surface-coated sintered body, comprising: a sintered body of cubic boron nitride and a surface coating layer formed on a surface thereof, said sintered body of cubic boron nitride including 20-99.5% by volume of cubic boron nitride and a binder, said surface coating layer including an adhesion layer and at least one hard coating layer, said adhesion layer being a metal layer including at least W, and being formed to cover a surface of said sintered body of cubic boron nitride, said hard coating layer being formed to coat said adhesion layer, said adhesion layer being configured of an amorphous state and/or ultrafine particles having an average particle size equal to or smaller than 5 nm, wherein said adhesion layer contains 0.1-20 atomic % of at least one type of element selected from a group consisting of Co, Ni and Fe.