The influence of HVAF powder feedstock characteristics on the sliding wear behaviour of WC-NiCr coatings
作者： Shenglin Liu , Dongbai Sun , Zishuan Fan , Hong-ying Yu , Hui-min Meng
DOI: 10.1016/J.SURFCOAT.2008.03.014
关键词: Nano- 、 Coating 、 Ball mill 、 Tribology 、 Scanning electron microscope 、 Nichrome 、 Microstructure 、 Composite material 、 Materials science 、 Particle
摘要: Abstract In this paper, the HVAF technique was used to deposit coatings with mechanically milled nano and micron blended WC–NiCr powders. The powder produced using high-energy ball milling process. Due low particle heating high velocity in process, fine dense microstructure of remains almost unchanged after spraying. sliding wear resistance two evaluated by ball-on-disc tests. It found that coating powders greatly improved compared powder. about hundred times than coefficient friction for increased steadily from 0.22 0.51, while it attained a steady value 0.58. Both were characterized terms their X-ray diffraction, scanning electron microscopy as-sprayed state as well wear. mechanism also discussed.
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