中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 23 No. 6 June 2013 |
（1. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;2. Surface Engineering Institute, Taiyuan University of Technology, Taiyuan 030024, China;3. College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China）
Abstract:The Zr-N alloying layers were prepared on the surface of pure titanium substrates by plasma surface alloying technique to improve the surface properties. The microstructure, chemical composition, and hardness of Zr-N surface alloying layers were analyzed to understand the mechanisms of surface alloying and hardness improvement. The tribological performance of Zr-N surface alloying layers was studied by ball-on-disc wear machine. The results show that Zr-N alloying layers formed are homogeneous and compact. The Zr-N surface alloying layer consists of an outer nitride layer and an inner diffusion zone of zirconium and nitrogen. The surface treatment enhances the hardness of the surface layers of pure titanium substrates greatly and a surfaces hardness of HK1870 is obtained. Though Zr-N surface alloying layer does not show friction-reducing effect, it improves the wear resistance of pure titanium obviously.
Key words: pure titanium; plasma surface alloying; Zr-N surface alloying layer; hardness; tribological properties
