Preparation and characterization of plasma Cu surface modified stainless steel

Cu modified layer was prepared on the surface of AISI304 stainless steel by plasma surface alloying technique. The effects of processing parameters on the thickness, surface topography, microstructure and chemical composition of Cu modified layer were characterized using glow discharge optical emiss...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2012-04, Vol.27 (2), p.260-264
Main Authors: Zhang, Xiangyu, Tang, Bin, Fan, Ailan, Ma, Yong, Tian, Linhai
Format: Article
Language:English
Subjects:
AUSTENITIC STAINLESS STEELS
Bacteria
Chemistry and Materials Science
Copper
Diffusion layers
Materials Science
PARAMETERS
PLASMAS
Process parameters
SCANNING ELECTRON MICROSCOPY
STAINLESS STEELS
STEELS
Topography
Wear resistance
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Summary:Cu modified layer was prepared on the surface of AISI304 stainless steel by plasma surface alloying technique. The effects of processing parameters on the thickness, surface topography, microstructure and chemical composition of Cu modified layer were characterized using glow discharge optical emission spectroscopy (GDOES), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The experimental results show that the surface modified layer is a duplex layer (deposited + diffused layer) with thickness of about 26 μm under the optimum process parameters. The modified layer is mainly composed of a mixture of Cu and expanded austenite phase. The ball-on-disk results show that the modified layer possesses low friction coefficients (0.25) and excellent wear resistance (wear volume 0.005×10 9 μm 3 ). The Cu modified layer is very effective in killing the bacteria S. aureus. Meanwhile, no viable S. aureus is found after 3 h (100% killed) by contact with the Cu alloyed surface.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-012-0449-8