Study on Tribological Properties of CoCrMo Alloys against Metals and Ceramics as Bearing Materials for Artificial Cervical Disc

Journal Article · Thu Feb 15 04:00:00 EST 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3158-4· OSTI ID:22860633

Xiang, Dingding; Song, Jian ^[1]; Wang, Song; Liao, Zhenhua ^[2]; Liu, Yuhong ^[1]; Tyagi, Rajnesh ^[3]; Liu, Weiqiang ^[1]

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1. Tsinghua University, State Key Laboratory of Tribology (China)
2. Research Institute of Tsinghua University in Shenzhen, Biomechanics and Biotechnology Lab (China)
3. Indian Institute of Technology (BHU), Department of Mechanical Engineering (India)

CoCrMo alloys are believed to be a kind of potential material for artificial cervical disc. However, the tribological properties of CoCrMo alloys against different metals and ceramics are not systematically studied. In this study, the tribological behaviors of CoCrMo alloys against metals (316L, Ti6Al4V) and ceramics (Si{sub 3}N{sub 4}, ZrO{sub 2}) were focused under dry friction and 25 wt.% newborn calf serum (NCS)-lubricated conditions using a ball-on-disc apparatus under reciprocating motion. The microstructure, composition and hardness of CoCrMo alloys were characterized using x-ray diffraction, scanning electron microscopy (SEM) and hardness testers, respectively. The contact angles of the CoCrMo alloys with deionized water and 25 wt.% NCS were measured by the OCA contact angle measuring instrument. The maximum wear width, wear depth and wear volume were measured by three-dimensional white light interference. The morphology and the EDX analysis of the wear marks on CoCrMo alloys were examined by SEM to determine the basic mechanism of friction and wear. The dominant wear mechanism in dry friction for CoCrMo alloys against all pairings was severe abrasive wear, accompanied with a lot of material transfer. Under 25 wt.% NCS-lubricated condition, the wear mechanism for CoCrMo alloys against ceramics (Si{sub 3}N{sub 4}, ZrO{sub 2}) was also mainly severe abrasive wear. However, severe abrasive wear and electrochemical corrosion occurred for the CoCrMo-316L pairing under lubrication. Severe abrasive wear, adhesive wear and electrochemical corrosion occurred for the CoCrMo-Ti6Al4V pairing under lubrication. According to the results, the tribological properties of CoCrMo alloys against ceramics were better than those against metals. The CoCrMo-ZrO{sub 2} pairing displayed the best tribological behaviors and could be taken as a potential candidate bearing material for artificial cervical disc.

• OSTI ID: 22860633
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 2 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESIVES
CERAMICS
CHROMIUM COMPOUNDS
COBALT COMPOUNDS
ELECTROCHEMICAL CORROSION
FRICTION
HARDNESS
INFANTS
INTERFERENCE
LUBRICATION
MICROSTRUCTURE
MOLYBDENUM COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SILICON NITRIDES
STAINLESS STEEL-316L
THREE-DIMENSIONAL CALCULATIONS
X-RAY DIFFRACTION
ZIRCONIUM OXIDES