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Journal of Nanomaterials
Volume 2016 (2016), Article ID 9080684, 6 pages
http://dx.doi.org/10.1155/2016/9080684
Research Article

Synthesis and Characterization of Nanostructured WC-Co/Al Powder Prepared by Mechanical Alloying

1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2Henan Key Laboratory of Non-Ferrous Materials Science & Processing Technology, Luoyang 471023, China
3School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

Received 17 April 2016; Revised 12 June 2016; Accepted 15 June 2016

Academic Editor: Mikael Motelica-Heino

Copyright © 2016 Ning Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanostructured WC-Co/Al powder was synthesized from WC-12Co powder and pure Al powder by mechanical alloying (MA). The morphology and microstructural evolution of WC-Co/Al powder were investigated by a series of characterization methods. The results showed that the β-Co phase in the initial WC-12Co powder was replaced by the AlxCo phases (such as Al9Co2 and Al13Co4). As the ball milling time increased, the average grain size of WC in the WC-Co/Al powder decreased firstly and then remained at a constant value of around 40 nm. The deposition behavior of powders sprayed by high velocity oxygen fuel (HVOF) spraying was investigated. During spraying, the WC-Co/Al powder had a better flattening than the WC-12Co powder without ball milling, which is beneficial to fabricate compact coatings with lower porosity.