Contact Deformation of Alumina

Figure 4

FE-SEM photomicrographs of shear-induced deformation band formation and microcracking (marked by hollow white arrows) at the indentation cavities of alumina at typical illustrative lower loading rates of (a) 2 × 10⁻³ and (b) 10⁰ N·s⁻¹.

(a)

(b)