Premium
Quench Hardness Anisotropy of Rhombohedral Crystals: Calcite
Author(s) -
Joshi D. R.,
Pandya J. R.
Publication year - 1992
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.2170270820
Subject(s) - knoop hardness test , calcite , quenching (fluorescence) , anisotropy , materials science , indentation hardness , trigonal crystal system , crystallography , crystal (programming language) , mineralogy , composite material , crystal structure , chemistry , optics , microstructure , fluorescence , physics , programming language , computer science
Variation of microhardness with orientation of indenter (A) and quenching temperature T q is studied on freshly cleaved surfaces {100} of natural rhombohedral crystals of calcite by producing Knoop indentations for various applied loads. The relation between hardness H A and quenching temperatures for the high loads (40–80 g) is graphically established. It also depends on the crystal orientation. The anisotropic indices are also determined.