Microstructure and wear properties of aluminum/aluminum-silicon composite coatings prepared by cold spraying

作者：Bakshi Srinivasa R; Wang Di; Price Timothy; Zhang Deen; Keshri Anup K; Chen Yao; McCartney D Graham; Shipway Philip H; Agarwal Arvind^*

来源：Surface and Coatings Technology, 2009, 204(4): 503-510.

DOI：10.1016/j.surfcoat.2009.08.018

• Aluminum coating
• Metal matrix composite
• Wear
• Delamination
• Cold spraying

Composite coatings containing aluminum and aluminum-11.6 wt.% silicon eutectic alloy phases of varying compositions were fabricated using cold spraying. Coating contained a uniform distribution of the two phases. The hardness of the coatings increased as the volume fraction of Al-Si in the coating increased. The length to width ratio of the splats was found to be larger for Al particles compared to Al-Si particles. Dry sliding ball-on-plate wear tests indicated that the wear volume loss was similar for the All and Al/Al-Si composite coatings in spite of the increase in microhardness. This discrepancy is explained by the inter-splat delamination mechanism. The coefficient of friction of aluminum coating reduced on AI-Si addition.

• 出版日期2009-11-15