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首页> 美国政府科技报告 >Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environment. Semi-annual report, August 14, 1996--January 14, 1997
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Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environment. Semi-annual report, August 14, 1996--January 14, 1997

机译：金属陶瓷复合热喷涂涂层，用于燃烧环境中的腐蚀和腐蚀保护。半年度报告，1996年8月14日 - 1997年1月14日

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Research is being conducted to determine the optimum ceramic/metal combination in thermally sprayed metal matrix composite coatings for erosion and corrosion resistance in new coal-fired boilers. The cermet composites will be produced using powder metallurgy and electrodeposition. Model Ni-Al{sub 2}O{sub 3} cermet coatings with varying alumina fractions were produced. During this period, powder processed and electrodeposited composites were tested in the erosion simulator (Al{sub 2}O{sub 3} erodent, 40 m/s velocity, 90{degree} impact angle) and their relative erosion resistances were determined. It was found that electrodeposited Ni-Al{sub 2}O{sub 3} composites containing small Al{sub 2}O{sub 3} particles (1{mu}m)s showed better erosion resistance than powder processed composites with large Al{sub 2}O{sub 3} particles (12{mu}m). Also, an increase in volume fraction of Al{sub 2}O{sub 3} particles in powder processed alloys led to decreased erosion resistance. For both powder processed and electrodeposited Ni-Al{sub 2}O{sub 3} composites, addition of hard Al{sub 2}O{sub 3} particles did not improve erosion resistance compared with pure Ni.

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