An Electron Microscope Study of the Structure of Abraded Rutile,
DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)
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It is known from X-ray line broadening studies that even in brittle ceramics a considerable amount of plastic deformation occurs in the surface layers during abrasion. Abrasion chips have been examined by transmission electron microscopy which revealed that they are segmented. This suggests that they form by microscopically heterogeneous plastic flow, with segments forming by some type of plastic instability. Ion bombardment thinning has been used to prepare specimens for transmission electron microscopy from the abraded surface and at various depths, revealing two distinct layers of damage. A model has been proposed to explain the out of character plastic deformation during abrasion.
- Ceramics, Refractories and Glass