期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 53, 期 -, 页码 92-97出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2015.05.010
关键词
Composite powder; Heat-treatment; Decarburization; Porosity; Nanostructured coating
资金
- National High-tech R&D Program of China [SS2013AA031401]
- Beijing Key Program of Natural Science Foundation [2131001]
- Beijing Natural Science Foundation [2154045]
Three kinds of thermal spray powders with different densities and WC particle sizes were prepared using in-situ synthesized nanoscale WC-Co composite powder as raw material. The WC-Co coatings were then fabricated by high velocity oxy-fuel thermal spraying. The phase constitution of the as-sprayed coatings and microstructures of the feedstock particles and the coatings were analyzed. The results show that the coating prepared using powder with a relatively higher density and smaller WC particle size exhibits simultaneously lower decarburization and higher density, and further enhanced hardness. The present study suggests an effective method to fabricate nanostructured WC-based cermet coatings with high properties. (C) 2015 Elsevier Ltd. All rights reserved.
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