Investigating the Mechanical Property and Rolling Contact Fatigue Life of Diamond-like Carbon Films on Bearing Steel
Microstructure and properties of plasma immersion ion implantation and deposition (PIII&D) diamond-like carbon (DLC) films on bearing steel substrate were studied. Raman spectroscopy analysis indicates that PIII&D DLC consists of a mixture of amorphous and crystalline phases, with a variable ratio of sp2/sp3 carbon bonds, and the sp3 bonds content more than 10％. Atomic force microscope (AFM) has revealed the deposition of extremely smooth DLC films, good adhesion, very high uniformity and compacting factor over large areas. The nanohardness (H) and the elastic modulus (E) of DLC films measurement indicates that the maximum H (E) value is 40GPa (430GPa), increased by 263.6％ (95.5％). The corrosion polarization curves in 3.5％ NaCl solution prove that the corrosion resistance of DLC samples is much better than that of substrate. The friction and wear behaviors and rolling contact fatigue (RCF) life of these samples have also been investigated by ball-on-disc and three-ball-rod fatigue testers. Results show that the friction coefficient decrease from 0.87 to 0.2; the L10 、L50 、La and L RCF life of treated sample increases by 9.1, 3.2, 2.5 and 2.4 times, respectively. The RCF life scatter extent of treated samples is improved significantly.
plasma immersion ion implantation and deposition (PIII&D) diamond-like carbon (DLC) film bearing steel mechanical property rolling contact fatigue life
Hongxi LIU Yehua JIANG Langping WANG Rongfeng ZHOU Baoyin TANG
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunm State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harb
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）