Wear of Fluorapatite Single Crystals : IV. Influence of Sliding Direction on Frictional Behavior and Surface Failure
- 1 September 1973
- journal article
- Published by SAGE Publications in Journal of Dental Research
- Vol. 52 (5) , 1019-1025
- https://doi.org/10.1177/00220345730520050401
Abstract
Frictional anisotropy of the basal plane of natural fluorapatite single crystals was observed ; the coefficient of friction (β) in the [2110] direction (β = 0.217) was approximately 12% higher than that in the [0110] direction (β = 0.193). The load at which the ductile-to-brittle transition occurred (Ω) was significantly higher in the [2110] direction (Ω = 77 gm) than in the [0110] direction (Ω = 15 gm). A mechanism is proposed involving the maximum normal stress and probable cleavage planes.Keywords
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