The transition from mild to severe wear in alumina during sliding
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2022, WearCitation Excerpt :The wear scar of the pure Al2O3 exhibited a smooth and flat surface facilitated by local plastic deformation. However, during the longer sliding test, a surface breakdown or separation is occurring, which includes cracks development through the grain boundaries and grains “pull-out”, similarly to that reported by Cho et al. [31]. Abrasive marks in the direction of sliding can be clearly seen on all the material surfaces.