Study on Erosion-Resistance of Electro-Thermal Explosion Ultra-High Speed Spraying MoSi2-Based Coatings

Shixiang Hou; Zong De Liu; Dong Yu Liu; Li Ping Zhao; Yi Min Ma

doi:10.4028/www.scientific.net/AMR.33-37.1271

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Study on Erosion-Resistance of Electro-Thermal Explosion Ultra-High Speed Spraying MoSi₂-Based Coatings

Abstract:

A new method, electro-thermal explosion ultra-high speed spraying, was utilized to produce the Mo-Si or Mo-Si-B coatings. Experimental results showed that submicron-grain pure MoSi2 phase coating and boron alloyed MoSi2-MoB2 multiphase coatings were in-situ synthesized on GH3039 nickel-based superalloy substrate. Erosion-resistance test of GH3039 nickel-based superalloy and MoSi2-based coatings were performed under high temperature(800°C) with GW/CS – MS erosion wear tester. Quartz sand was employed as erosive material. Experimental results showed that the erosion-resistance of the MoSi2-based coatings is better than that of the GH3039 nickel-based superalloy.