| 摘要 |
PURPOSE:To prepare a member covered with cubic boron nitride having improved resistance to delamination of the coating layer prepd. by interposing a layer of an Al compd. as an intermediate layer in the stage for forming an external layer consisting essentially of cubic boron nitride on the surface of a base body. CONSTITUTION:In the stage of prepg. a covered member by forming an external layer consisting essentially of cubic boron nitride on the surface of a base body, intermediate layer(s) constituted of a single or multiple layers is(are) interposed between the base body and the external layer, and the intermediate layer adjacent to the external layer is formed of a layer of an Al compd. comprising aluminium boride or aluminum boronitride. Further, if the external layer is constituted of cubic boron nitride, the thickness of the layer is regulated to ca. 1-15mu. If the cubic boron nitride contains a binding phase, the thickness of the layer is regulated to ca. 0.05-0.8mm. By this constitution, the resistance to delamination of the covering layer is improved, and a covered member having superior characteristics such as high hardness, high heat conductivity, high electric insulation, etc., is obtd.
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