Severe wear behaviour of alumina balls sliding against diamond ceramic coatings

Bulletin of materials science

VAMSI KRISHNA BALLA³  AWADESH KUMAR MALLIK³  MITUN DAS³  SHIRSHENDU CHAKRABORTY³  NANDADULAL DANDAPAT³  ANURADHA JANA¹  RAJNARAYAN SAHA² 

[1] CSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, India$$Department of Chemistry, National Institute of Technology, Durgapur 713209, India$$CSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, IndiaCSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, India$$Department of Chemistry, National Institute of Technology, Durgapur 713209, India$$Department of Chemistry, National Institute of Technology, Durgapur 713209, IndiaCSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, India$$Department of Chemistry, National Institute of Technology, Durgapur 713209, India$$;Department of Chemistry, National Institute of Technology, Durgapur 713209, India$$Department of Chemistry, National Institute of Technology, Durgapur 713209, IndiaDepartment of Chemistry, National Institute of Technology, Durgapur 713209, India$$;CSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, India$$CSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, IndiaCSIRâ€�?�Central Glass & Ceramic Research Institute, Kolkata 700032, India$$

关键词: Alumina;    diamond;    ceramic coatings;    tribology.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

At present alumina is themost widely used bio-ceramic material for implants.However, diamond surface offers very good solid lubricant for different machinery, equipment including biomedical implants (hip implants, knee implants, etc.), since the coefficient of friction (COF) of diamond is lower than alumina. In this tribological study, alumina ball was chosen as the counter body material to show better performance of the polycrystalline diamond (PCD) coatings in biomedical load-bearing applications.Wear and friction data were recorded for microwave plasma chemical vapour deposition (MWCVD) grown PCD coatings of four different types, out of which two sampleswere as-deposited coatings, one was chemo-mechanically polished and the other diamond sample was made free standing by wet-chemical etching of the silicon wafer. The coefficient of friction of the MWCVD grown PCD against Al$_2$O$_3$ ball under dry ambient condition was found in the range of 0.29�??0.7, but in the presence of simulated body fluid, the COF reduces significantly, in the range of 0.03�??0.36. The samples were then characterized by Raman spectroscopy for their quality, by coherence scanning profilometer for surface roughness and by electron microscopy for their microstructural properties. Alumina balls worn out ($14.2 imes 10^{�?1}$ mm$^3$) very rapidly with zero wear for diamond ceramic coatings. Since the generation of wear particle is the main problem for load-bearing prosthetic joints, it was concluded that the PCD material can potentially replace existing alumina bio-ceramic for their bettertribological properties.

【 授权许可】

Unknown