• T Kumara Swamy

      Articles written in Bulletin of Materials Science

    • Systematic hardness measurements on mixed and doped crystals of rubidium halides

      D B Sirdeshmukh T Kumara Swamy P Geeta Krishna K G Subhadra

      More Details Abstract Fulltext PDF

      Efforts are made to improve the hardness of rubidium halide crystals by

      solid solution hardening and

      impurity hardening.

      Systematic microhardness measurements have been made on rubidium halide mixed crystals (RbBr–RbI and KI–RbI) and rubidium halide crystals doped with Sr2+ ions. The composition dependence of the hardness of mixed crystals follows the law $\Delta H_V$ = $K\ x$ (1–𝑥), where $\Delta H_V$ is the enhancement in hardness, 𝐾 a constant and 𝑥 and (1 – 𝑥) the concentrations of the first and second component of the mixed crystals, respectively. The hardness of doped crystals increases with the concentration 𝐶 of the dopant according to the law, $\Delta H_V$ = $k\ C^m$, where 𝑘 and 𝑚 are constants. The relative efficacy of the two methods of hardening is discussed.

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