Abstract
This paper presents the chemical etching and microhardness studies carried out on L-arginine perchlorate (LAPCl), a non-linear optical crystal (NLO) with a view to characterize the dislocation structure and mechanical strength of the grown crystals. LAPCl crystals employed in this investigation were grown from aqueous solution by solvent evaporation method. Optical microscopic studies of as grown habit faces revealed formation of macrosteps and valley on (100) habit face. Chemical etching of (100) face with impurity added organic solvents played an important role in the formation of etch pits. Selective etching of matched pairs on opposite faces of the same plane confirms that the pits are formed at the dislocation sites. Microhardness measurement by indentation method shows decrease of microhardness with increasing load. Nature of hardness profile is explained with the help of Meyer’s law. The work hardening index value indicates that LAPCl belongs to hard crystal category.
Similar content being viewed by others
References
S B Monaco, L E Davis, S P Velsko, F T Wang and D Eimerl J. Crystal Growth 85 252 (1987)
N Srinivasan and R K Rajaram Zeitschrift fur Kristallographie 212 311 (1997)
T Mallik and T Kar J. Crystal Growth 274 251 (2005)
A Yokotani, T Sasaki, K Yushida, T Yamanaka and C Yamanaka Appl. Phys. Lett. 48 1030 (1986)
G Dhanraj, T Shripathi and H L Bhat J. Crystal Growth 113 456 (1991)
A Yokotani, T Sasaki, K Fujioka, S Nakai and C Yamanaka J. Crystal Growth 99 815 (1990)
G Dhanaraj and H L Bhat Mater. Lett. 10 283 (1990)
Xun Sun, Chang-Shui Fang, Qing-tian Gu, Sheng-Lai Wang, Yun Nan Li, Xin Guang Xu and Zhang-Shou Gao J. Crystal Growth 250 152 (2003)
S Keerti and G A Dubov Indian J. Pure Appl. Phys. 6 258 (1968)
A Sagar and J W Faust J. Appl. Phys. 38 482 (1967)
A R Patel and R P Singh Jpn. J. Appl. Phys. 6 938 (1967)
K Sangwal Etching of Crystals, Theory, Experiment and Application (The Netherland: Elsevier Science Publisher B.V.) (1987)
S Anbukumar, S Vasudevan and P Ramasamy J. Mater. Sci. Lett. 5 223 (1986)
M Shanmugham, F D Gnanam and P Ramasamy J. Mater. Sci. Lett. 5 174 (1986)
J B Charles and F D Gnanam J. Mater. Sci. Lett. 9 165 (1990)
R C Dhas, J B Charles and F D Gnanam J. Mater. Sci. Lett. 12 1395 (1993)
T Irusan, D Arivuoli and P Ramasamy J. Mater. Sci. Lett. 12 405 (1993)
Meyer Some aspects of the hardness of metals, PhD Thesis, Dreft (1951)
E M Onitsch Mikroskopie 2 131 (1947)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mallik, T., Pal, T. & Kar, T. Dislocation structure and microhardness of L-arginine perchlorate single crystal. Indian J Phys 83, 1395–1406 (2009). https://doi.org/10.1007/s12648-009-0133-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12648-009-0133-9