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ROLLING CONTACT FATIGUE LIFE AND MECHANICAL PROPERTY OF TiN FILM FABRICATED BY PLASMA IMMERSION ION IMPLANTATION |
LIU Hongxi; JIANG Yehua; ZHOU Rong; ZHOU Rongfeng; JIN Qinglin TANG Baoyin |
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Cite this article:
LIU Hongxi; JIANG Yehua; ZHOU Rong; ZHOU Rongfeng; JIN Qinglin TANG Baoyin. ROLLING CONTACT FATIGUE LIFE AND MECHANICAL PROPERTY OF TiN FILM FABRICATED BY PLASMA IMMERSION ION IMPLANTATION. Acta Metall Sin, 2008, 44(3): 325-330 .
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Abstract Titanium Nitride (TiN) hard protective films were fabricated on AISI52100 bearing steel substrate employing plasma immersion ion implantation and deposition (PIII&D) technique. The TiN films have been characterized using a variety of test methods. X-ray diffraction (XRD) analysis indicates that PIII&D results in the formation of three varieties of titanium components in the surface layer, which has also been proved by X-ray photoelectron spectroscopy (XPS) combined with Ar sputtering. Atomic force microscope (AFM) has revealed the deposition of extremely smooth TiN films, having very high uniformity and compact density over large areas. The nanohardness (H) and the elastic modulus (E) of TiN films measurement indicates that the maximum H (E) value is 25GPa (350GPa), increased by 127.3% (59.1%). 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 testers. Results show that the friction coefficient decrease from 0.92 to 0.2; the L10 、L50 、La and L RCF life of treated sample increases by 5.5, 2.8, 2.3 and 2.2 times, respectively. The RCF life scatter extent of treated sample is improved significantly.
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Received: 03 July 2007
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