Erosion Behavior of Hard Surface Coatings/Inserts
The wear resistance requirements of some of the components in the emerging energy systems necessitates the use of hard materials of the refractory hard metal family, i.e., carbides, nitrides, borides, silicides, to serve at the wear surface. They are used either as deposited coatings on structural metal surfaces or as separately fabricated inserts that are assembled into a structural metal retaining area. There has been considerable study of the wear behavior of carbides, nitrides and borides in rubbing and sliding wear and in abrasive wear. However, there has been very little research conducted to determine their resistance to wear by erosive particles directed at the surface by a gas stream. In several of the newer energy conversion and utilization systems, particularly those that use coal, the mechanism of erosive wear is an active one that must be addressed.
KeywordsErosion Rate Silicon Carbide Silicon Nitride Erosion Behavior Erosive Wear
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