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1 Scientific Problems of Machines Operation and Maintenance

1 2010

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Nanostructured composite materials on the base of titanium and zirconium with modified surface layers for medicine and engineering

100%

Sharkeev Y. P. , Kukareko V. A. , Legostaeva E. V. , Byeli A. V.

2010

tom Vol. 45, nr 1

45-52

This paper presents the results of the investigations of mechanical and tribological properties of ultrafine-grained and nanostructured titanium and zirconium under microplasma and ion beam treatments. It indicates that the nitrogen ion beam treatment of titanium and zirconium at low temperatures essentially increases the wear resistance by 35-50 times and reduces the friction coefficient by 40 percent. The biocomposite (nanostructured titanium - calcium phosphate coating) demonstrates a high friction coefficient (0.4-1.0) in tribological interaction with an ultrahigh molecular polyethylene imitated of subcutaneous tissue and bone tissue that allows to eliminate the microdisplacements of an implant against bone tissue under friction and to increase its fixation. A considerable improvement of tribological characteristics of the nanostructured titanium and zirconium with the modified surface layers give the advantages for these materials in medicine and engineering.