PREPARATION OF COPPER AND CHROMIUM ALLOYED LAYERS ON PURE TITANIUM BY PLASMA SURFACE ALLOYING TECHNOLOGY

Xiaojing He, Meng Li, Huizhen Wang, Xiangyu Zhang () and Bin Tang
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Xiaojing He: Research Institute of Surface Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Shanxi 030024, P. R. China
Meng Li: Research Institute of Surface Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Shanxi 030024, P. R. China
Huizhen Wang: Research Institute of Surface Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Shanxi 030024, P. R. China
Xiangyu Zhang: Research Institute of Surface Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Shanxi 030024, P. R. China
Bin Tang: Research Institute of Surface Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Shanxi 030024, P. R. China

Surface Review and Letters (SRL), 2015, vol. 22, issue 04, 1-7

Abstract: Cu–Cralloyed layers with differentCuandCrcontents on pure titanium were obtained by means of plasma surface alloying technology. The microstructure, chemical composition and phase composition ofCu–Cralloyed layers were analyzed by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD), respectively. The experimental results demonstrate that the alloyed layers are bonded strongly to pure titanium substrate and consist of unboundTi,CuTi,Cu3Ti,CuTi3andCr2Ti. The thickness ofCu5Cr5andCu7Cr3alloyed layer are about 18 μm and 28 μm, respectively. The antibacterial properties against gram-negativeEscherichia coli(E.coli, ATCC10536) and gram-positiveStaphylococcus aureus(S. aureus, ATCC6538) of untreated pure titanium andCu–Cralloyed specimen were investigated by live/dead fluorescence staining method. The study shows thatCu–Cralloyed layers exhibit excellent antibacterial activities against bothE.coliandS.aureuswithin 24 h, which may be attributed to the formation ofCu-containing phases.

Keywords: Pure titanium; Cu–Cralloyed layer; plasma surface alloying; antibacterial property (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1142/S0218625X15500560

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