Verification and Application of Modified Kick's Law to Rhombohedral Crystals: Sodium Nitrate | Zendy

Joshi D. R. | Zendy; Pandya J. R. | Zendy

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Verification and Application of Modified Kick's Law to Rhombohedral Crystals: Sodium Nitrate

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.2170270711

Subject(s) - knoop hardness test , indentation , anisotropy , sodium nitrate , cleavage (geology) , sodium , crystallography , chemistry , crystal (programming language) , diagonal , materials science , thermodynamics , law , mathematics , geometry , indentation hardness , physics , composite material , optics , inorganic chemistry , metallurgy , microstructure , programming language , fracture (geology) , computer science , political science

Optical study of mechanical response indicated by Knoop indentation of cleavage faces of synthetic sodium nitrate crystal based on M EYER 's Law/K ICK 's Law ( P = ad n ) and also on modified K ICK 's Law {( P — W ) = bd 2 } expressing relations between applied load P and diagonal length d is made. The Newtonian resistance pressure W is finite and positive. The value of standard hardness ( a and b ), exponent n are calculated. It is found that W and b are almost contant and independent of thermal treatment and of the indenter orientation with respect to direction [100] on cleavage plane (100) of sodium nitrate crystals. Since they are independent of indenter orientations, they are not associated with crystal anisotropy.

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