Patent ID: 9115426
Filing Date: 2015-08-25
Classification: C23C,Y10T

Abstract:
1. A coated article of steel having: at least one layer having a high hardness and a high resistance to wear applied by at least one of a PVD (physical vapor deposition) process, a CVD (chemical vapor deposition) process, and a PECVD (plasma enhanced chemical vapor deposition) process (but excluding an ALD processor a plasma enhanced ALD process) at at least one surface region of said article; at least one ALD layer comprising at least one layer of a material deposited by an ALD (atomic layer deposition) process on said at least one layer having a high hardness and a high resistance to wear, wherein the steel of which the article is made is a martensitic grade of steel, wherein the at least one layer having a high hardness and a high resistance to wear is a DLC layer, a metal-DLC layer, or a CrAIN layer and has a thickness in the range from 0.5 microns to 4 microns and a hardness in the range from 20 GPa to 100 GPa, and wherein the at least one ALD layer is selected from the group comprising Al the coated article of steel further having an additional layer of Al