Observations and Characterization of Damage in Diamond Coatings Due to Impact Loading

Abstract

Calculated impact load, F m (N) 4678 (4226-4983) 3873 (3499-4126) Calculated mean contact pressure, P m (GPa) 32.3 (31.2-33.0) 22.1 (21.4-22.6) Calculated contact radius, a m (mm) 215 (208-219) 236 (228-241) Calculated contact diameter, d m (mm) 430 (416-438) 472 (456-482) Maximum tensile stress, s m (GPa) 13.9 (13.4-14.2) 4.65 (4.50-4.75) Calculated contact time, t e (ms) 3.08 (3.05-3.13) 3.72 (3.68-3.78) Maximum shear stress, t m (GPa) 15.0 Depth of maximum shear stress z t (mm) 69 (66-70) 76 (73-77)The figures in parentheses represent the range in the values arising from the spread in sphere velocities.

Erosion difference of growth and nucleation sides of free-standing diamond films prepared by DC arc plasma jet CVD

“…But windows at the front of vehicles are susceptible to erosion from high-velocity airborne particles, run-way debris, et al [4][5][6][7][8], which can cause rapid degradation of the optical properties or, in the worst case, catastrophic failure.…”