Bulletin of materials science | |
Microhardness studies on nonlinear optical ð¿-alanine single crystals | |
S Kalainathan1  R Hanumantharao2  | |
[1] Crystal Research Centre, VIT University, Vellore 632 014, India$$Crystal Research Centre, VIT University, Vellore 632 014, IndiaCrystal Research Centre, VIT University, Vellore 632 014, India$$;Vignan’s Institute of Information Technology, Physics Division, Visakhapatnam 530 049, India$$Vignan’s Institute of Information Technology, Physics Division, Visakhapatnam 530 049, IndiaVignan’s Institute of Information Technology, Physics Division, Visakhapatnam 530 049, India$$ | |
关键词: Organic compounds; mechanical properties; hardness; anisotropy.; | |
DOI : | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Vickers and Knoop microhardness tests were carried out on grown ð¿-alanine single crystals by slow evaporation technique over a load range of 10â€�??50 g on selected broad (2 0 3) plane. Vickers (ð»v) and Knoop (ð»k) microhardness for the above loads were found to be in the range of 60â€�??71 kg/mm2 and 35â€�??47 kg/mm2, respectively. Vickers microhardness number (ð»v) and Knoop microhardness number (ð»k) were found to increase with increasing load. Meyer’s index number (ð‘�??) calculated from ð»v shows that the material belongs to the soft material category. Using Wooster’s empirical relation, the elastic stiffness constant (ð‘�?11) was calculated from Vickers hardness values. Young’s modulus was calculated using Knoop hardness values. Hardness anisotropy has been observed in accordance with the orientation of the crystal.
【 授权许可】
Unknown
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Files | Size | Format | View |
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RO201912010229765ZK.pdf | 478KB | download |