Supersonic Rain and Sand Erosion Research: Characterization and Development of Erosion Resistant Materials.

摘要

Development and evaluation studies on electrodeposited, sprayed and diffusion coatings capable of providing erosion protection for titanium turbine engine blades were carried out. Recently developed hard coatings of carbides and borides exhibited sand eorsion resistance 2.5 - 5 times that of uncoated titanium. Results are outlined on comparative erosion characteristics of thermoplastic polymers that might be used as coatings and might possess satisfactory rain erosion resistance. Correlation of the physical and mechanical properties of these polymers with erosion resistance, are discussed. The mechanism of erosion damage caused by plastic deformation and progressive fracture is discussed in detail. The erosion process occurring by these two methods considers ductile pitting, abrasion, polishing, fatigue, tearing and brittle fracture. (Author)