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The effect of divalent impurity state on the microhardness of NaCl crystals
Author(s) -
Andreev G. A.,
Klimov V. A.
Publication year - 1982
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.2170170915
Subject(s) - impurity , metastability , indentation hardness , annealing (glass) , materials science , precipitation , hardening (computing) , softening , crystallography , doping , divalent , condensed matter physics , metallurgy , mineralogy , chemical physics , microstructure , chemistry , composite material , physics , layer (electronics) , meteorology , optoelectronics , organic chemistry
The microhardness and bulk density variations with annealing temperature have been measured in NaCl crystals doped with Ca 2+ , Cd 2+ , Ni 2+ , and Pb 2+ . Both characteristics are not affected by coherent metastable precipitation while incoherent precipitation produces either hardening or softening depending on the impurity phase type (stable or metastable). The results support the suggestion that aggregates and coherent precipitates are cut through by dislocations whereas incoherent precipitates are by‐passed via the Orowan looping mechanism.