A Comparison Study on the Microstructure, Mechanical Features, and Tribological Characteristics of TiN Coatings on Ti6Al4V Using Different Deposition Techniques
Source abstract
Abstract
Titanium alloys are considered lightweight alloys and are widely applied across various industries. However, their low hardness, poor wear resistance, and limited oxidation resistance restrict their prospects for wider application. In this paper, nitride coatings were prepared using three preparation processes, namely laser surface nitriding (LSN), physical vapor deposition (PVD), and plasma ion implantation (PII). Their microstructure, microhardness, tribological behavior, and high-temperature oxidation characteristics were compared. The experimental results revealed that nitrided coatings were successfully prepared using the three methods. However, a comparison of these data shows that the LSN coating exhibited superior comprehensive performance. It achieved the maximum thickness within the shortest preparation time: the thickness was about 280 μm and the deposition rate of the LSN method was 2250 and 90,000 times higher than those of the PVD and PII methods. Nitrides have high hardness, but the carrying capacity could be attributed to the thickness of the coatings: the PVD coating could withstand a force of 500 g, while the PII coating only withstood a force of less than 25 g. In addition, as hardness is the most important factor for excellent wear resistance, the average volumetric wear rate of the LSN and PVD coatings was about 9 × 10−6 mm3/m·N, and their relative wear resistance was 49.2 times that of Ti6Al4V. Meanwhile, the excellent bond between the LSN coating and the substrate was evidenced by a high-temperature oxidation test during a rapid heating–cooling cycle.
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Research context
OpenAlex topics: Metal and Thin Film Mechanics · Diamond and Carbon-based Materials Research · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
State-Owned Sida Machinery Manufacturing Company, Xianyang 610400, China
Key Laboratory of Hunan Province of Equipment Safety Service Technology under Extreme Environment, College of Mechanical Engineering, College of Nuclear Science and Technology, School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
College of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China
State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Light Alloys Research Institute, Central South University, Changsha 410083, China
School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Funding
National Natural Science Foundation of China · Education Department of Hunan Province · Project of the State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Central South University · Hengyang City research project of the Science and Technology Bureau
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