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Effect of Various Impurities on the Hardness of NaCl Crystals
Author(s) -
Sayan P.,
Ulrich J.
Publication year - 2001
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 - 10.1002/1521-4079(200111)36:11<1253::aid-crat1253>3.0.co;2-2
Subject(s) - indentation hardness , indentation , impurity , crystal (programming language) , brittleness , materials science , divalent , crystallography , ion , analytical chemistry (journal) , vickers hardness test , knoop hardness test , composite material , mineralogy , chemistry , metallurgy , microstructure , chromatography , organic chemistry , computer science , programming language
The hardness of NaCl crystal in the presence of mono, divalent and polyvalent ions were measured. Measurements were made in the indentation load range from 5 x 10 ‐3 to 20 x 10 ‐3 N. The measured data showed that there is an indentation size effect. Classical Meyer's law was used for the characterization of crystal hardness f NaCl. The Meyer index was found to be smaller than 2 indicating brittle material characteristic. The PRS model was also used for the determination of the load‐independent microhardness value. It was found that the crystal hardness of NaCl is chancing depending on the type of impurity and the concentration.