PVD wear-resistant coating plating thickness into the era of 100 microns

Physical vapor deposition (PVD) technology is a method of converting material sources into subs, molecules or plasmas under vacuum conditions and eventually depositing them on the surface of the substrate. The coating plated by this technology is smooth and dense and has good combination with the substation, the operating temperature is low, so the base material is widely applicable, and the resulting environmental emissions are non-polluting and belong to the green processing technology. In particular, the use of this technology plated to reduce the wear-resistant coating, not only has the characteristics of low friction and low wear, but also has high hardness, strong combination, corrosion resistance and other advantages, has been widely used in aerospace, marine engineering, machinery manufacturing and automotive parts and other industries.
However, the plating thickness of the vast majority of PVD wear-resistant coatings is less than 10 microns, and the plating thickness of PVD wear-resistant coatings designed with a special gradient interface is difficult to exceed 50 microns, greatly limiting its application on heavy-duty, long-life, high-reliability component surfaces. Dr. Wang Yongxin of Ningbo Materials Institute and others, through the design and regulation of plasma energy and state in the vacuum reaction chamber, effectively reduce the internal stress build-up and surface resputtering loss caused by bombardment during the filming process of PVD wear coating, and successfully make crN and other typical PVD wear coating single layer plating thickness of 100 microns, which indicates the use of gradient layer Structural design methods such as alternating layers or multiple composites are expected to achieve greater thickness preparation of PVD wear-resistant coatings, so that the plating thickness of PVD wear-resistant coatings into the era of 100 microns/sub-millimeters, greatly improving the carrying capacity and service life of PVD wear-resistant coatings, but also for valves, blades and other complex conditions under the surface protection of high-reliability components opened up a new way.
this part of the research work has been supported by the National Natural Science Foundation of China (NO. 51475449) and the Chinese Academy of Sciences Key Laboratory Fund for Marine New Materials and Applied Technology.