Origins for the anisotropy of the friction force of diamond sliding on diamond

A theoretical model that integrates the comprehensive effects of surface roughness, plastic deformation, adhesion, material strength and crystal orientation is established to quantitatively calculate the frictional force of diamond sliding on diamond. The effectiveness and accuracy of the model are...

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Bibliographic Details
Published in:Tribology international 2020-08, Vol.148, p.106298, Article 106298
Main Authors: Liu, Hanzhong, Zong, Wenjun, Cheng, Xiao
Format: Article
Language:English
Subjects:
Adhesive strength
Amorphous defect
Anisotropy
Atomic force microscopy
Computer simulation
Crystal defects
Crystal structure
Deformation effects
Diamond friction
Diamonds
Dislocation
Model accuracy
Molecular dynamics
Plastic deformation
Shear strain
Sliding
Surface roughness
Surface roughness effects
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Summary:A theoretical model that integrates the comprehensive effects of surface roughness, plastic deformation, adhesion, material strength and crystal orientation is established to quantitatively calculate the frictional force of diamond sliding on diamond. The effectiveness and accuracy of the model are verified by various nanofrictional experiments using an atomic force microscopy tip and molecular dynamics simulations sliding along the different orientations on the {100} and {110} crystal planes. Moreover, the internal reasons why the frictional force of diamond sliding on diamond is anisotropic are analyzed to be caused by the amorphous defects, dislocations and von Mises shear strain occurring on the rubbed surface. [Display omitted] •An accurate model was established to predict anisotropic friction force of diamond.•The amorphous defects influence the value of frictional force of diamond.•The anisotropy of diamond friction is related to the dislocation and shear strain.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2020.106298