Title: Deposition of Fe-based metallic glass coatings by Air Plasma Spraying process

Authors: Fuping Li, Jinshan Li, Hongchao Kou, Chaoping Jiang, Xiangyi Xue, Hengzhi Fu

Addresses: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China. ' State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China. ' State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China. ' State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China. ' State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China. ' State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China

Abstract: Fe-based metallic glass coatings were prepared on Ti–3Al–5Mo–5V–4Cr–2Zr substrate by Air Plasma Spraying (APS). The effect of spraying power (arc current) on amorphous phase content and properties of the coatings was investigated. It was revealed that the coating sprayed at arc current of 150 A was nearly fully amorphous although the spraying powders were not. The amorphous phase content in the coatings decreased with increasing arc current. Vickers microhardness and corrosion behaviour of the sprayed coatings were also studied. The highest cross-section microhardness of the coatings was Hv_0.05908, roughly three times as high as that of the substrate. The coating sprayed at arc current of 300 A exhibited the best excellent corrosion resistance.

Keywords: metallic glass coatings; APS; air plasma spraying; microhardness; corrosion resistance; spraying power; arc current; amorphous phase content; Vickers microhardness; corrosion resistance.

DOI: 10.1504/IJSURFSE.2010.033256

International Journal of Surface Science and Engineering, 2010 Vol.4 No.3, pp.288 - 295

Published online: 14 May 2010 *

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