D R Joshi
Articles written in Bulletin of Materials Science
Volume 20 Issue 3 June 1997 pp 333-336
Knoop microhardness studies were carried out on anthracene single crystals. The hardness vs load plot shows two peaks, one at 5g and another at 17·5 g having hardness values 13·0 kg/mm2 and 11·4 kg/mm2 respectively. The present observation shows that the$$(20\bar 1)$$ dislocations split into partials.
Volume 20 Issue 8 December 1997 pp 1103-1108
Microhardness anisotropy in single crystals of anthracene and phenanthrene has been observed by the Knoop indentation technique. The Knoop hardness variation with respect to the  direction shows opposite trends. Both these crystals have the same crystal structure and space group. The present observations are explained in terms of orientation and disposition of molecules in the unit cells.
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