Patent ID: 9120933
Filing Date: 2015-09-01
Classification: C09D,C23C,Y10T

Abstract:
1. A white hard decorative member comprising: a base material; an adherence layer composed of a lower oxide layer of an alloy combining a metal M1, a metal M2 and selectively, a metal M3, which is stacked on said base material; a gradient adherence layer composed of a reaction compound between an alloy combining a metal M4, a metal M5 and selectively, a metal M6 and a non-metal element selected from one member or two or more members of nitrogen, carbon and oxygen, which is stacked on said adherence layer; an abrasion-resistant layer composed of a reaction compound between an alloy combining a metal M7, a metal M8 and selectively, a metal M9 and a non-metal element selected from one member or two or more members of nitrogen, carbon and oxygen, which is stacked on said gradient adherence layer; and a color-up gradient layer composed of a reaction compound between an alloy combining a metal M10, a metal M11 and selectively, a metal M12 and a non-metal element selected from one member or two or more members of nitrogen, carbon and oxygen, which is stacked on said abrasion-resistant layer, wherein each of said metals M1, M4, M7 and M10 is selected from one or two of Mo and W, each of said metals M2, M5, M8 and M11 is selected from one or two of Nb and Ta, each of said metals M3, M6, M9 and M12 is selected from one member or two or more members of Cr, Ti, Hf and Zr, the non-metal element content in the reaction compound constituting said gradient adherence layer is gradually increased in a thickness direction with distance from the base material, and the non-metal element content in the reaction compound constituting said color-up gradient layer is gradually decreased in a thickness direction with distance from the base material.