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About 200 years after Mohs – Nanoscratching LiB 3 O 5
Author(s) -
Paufler P.,
Shakhverdova I. P.,
Bubnova R. S.,
Filatov S. K.,
Meyer D. C.
Publication year - 2008
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200800339
Subject(s) - scratch , scratching , mohs scale of mineral hardness , indentation , materials science , diamond , nanoscopic scale , dislocation , nanotechnology , composite material
Though simple scratch hardness tests after Mohs are still used today, the development of diamond nanoscratching equipment offers new possibilities to meet demands of modern nanotechnology. Preceding approaches to assign hardness values to materials are briefly reviewed, and scratch hardness is related to indentation hardness. Taking single‐crystalline LiB 3 O 5 as an example, the dependence of scratch morphology on the direction of scratching is demonstrated quantitatively. The coefficient of friction depends on normal load and varies between 0.25 and 0.37. Moreover, it is oscillating during scratching thus reflecting processes at nanoscale. Dislocation etch pits were observed due to scratching. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)