Dry sliding wear behaviour of beta-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications Articles uri icon

publication date

  • March 2019

start page

  • 335

end page

  • 344

volume

  • 91

international standard serial number (ISSN)

  • 1751-6161

electronic international standard serial number (EISSN)

  • 1878-0180

abstract

  • The dry sliding wear behaviour of different Ti-Nb and Ti-Mo surfaces was investigated in order to evaluate the role of Nb and Mo beta-stabilizing elements in titanium wear resistance to consider them for biomedical applications. Dry sliding wear tests were performed under =lubricated conditions using a ball-on-plate tribometer (UMT) with reciprocating lineal movement of 1 Hz frequency at different loads (2 and 5 N) and against two counterface materials (alumina and stainless steel) to assess the effect of these parameters on wear. The results indicated an improvement in wear resistance for all the modified Ti surfaces. Metal-on-metal surfaces exhibited higher wear rate than ceramic-on-metal, and higher wear was observed for the more severe conditions. Wear rate values on modified surfaces were between 53% and 96% lower compared to pure Ti tested at 2 N, and up to 79% lower than Ti at 5 N. In both cases the highest wear reduction was observed for Ti-Mo-NH4Cl surface.

keywords

  • beta-gradient titanium; diffusion treatments; mo; nb; wear; biomaterial; titanium-alloys; metallic biomaterials; mechanical-properties; microstructure; resistance