Enhancing wear resistance and biocompatibility of medical ZrNb alloy used for artificial joint via femtosecond laser surface processing combined with thermal oxidation
Chaoqun Xia , Wanwan Liang , Xing Zhang , Bin Zhang , Shuguang Liu , Bohan Chen , Ning Liu , Tai Yang , Qiang Li
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引用次数: 0
Abstract
Zr-2.5Nb alloy is widely used as an implant material in the biomedical field. Zr-2.5Nb alloy was subjected to laser processing and laser processing combined with thermal oxidization composite treatment to investigate the effects of different structures and surface treatments on its morphology and surface element distribution, corrosion, friction properties and biocompatibility. The results show that after laser processing alone, ZrO2 and Nb2O5 appear on the surface, but the oxide film is thin, and after composite treatment, t-ZrO2 appears on the surface of the Bulge structure. Meanwhile, the corrosion resistance of the alloy in simulated body fluids is significantly improved after composite treatment, among which the LIPSS structure has the strongest corrosion resistance, and the corrosion current density is improved by two orders of magnitude in comparison with that of the substrate. The results of the wear volume experiments show that the wear resistance of both the laser treatment and its composite treatment is improved, with the LIPSS structure having the best performance. In addition, the composite treatment was shown to be biocompatible and suitable for use as an implant material.
期刊介绍：
Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance:
A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting.
B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.
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