Abstract
Microhardness studies were carried out using four alums. The hardness of these crystals was found to be more than alkali halides but was comparable with alkaline earth nitrates. The load variation of hardness has been discussed. Hardness results on these alums have been analysed taking into account the structure. It was observed that hardness varied witha −4, wherea is the lattice constant. Preliminary results on dislocation etching are reported.
Similar content being viewed by others
References
Bragg W L 1967Crystalline state (London: G Bell & Sons Ltd) Vol. 1, p. 225
Buckley H E 1951Crystal growth (New York: Wiley)
Chin G Y, Van Utert L G, Green M L and Zydzik G J 1972Scr. Metall. 6 503
Gilman J J 1973The science of hardness testing and its research applications (Ohio: Amer. Soc. Metals)
Haussuhl S 1961Z. fur Kristall 116 24
Hays C and Kendall E G 1973Metallography 6 275
Holden A and Singer P 1968Crystals and crystal growing (Bombay: Vakil’s, Febber & Simons)
Kick F and Das Gesetzder 1885Proportionalen winderstande and science anwendung (ed) Leipzit Felix
Pratap K J and Haribabu V 1980Bull. Mater. Sci. 2 43
Thirmal Rao T and Sirdeshmukh D B 1991Cryst. Res. Technol. 26 K53
Upit G P and Varchanya S A 1973The science of hardness testing and its research applications (Ohio: Amer. Soc. Metals)
Van Enckevort W J P and Van der Linden W H 1979J. Cryst. Growth 47 196
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sangaiah, G., Kishan Rao, K. Microhardness studies on some alum crystals. Bull. Mater. Sci. 16, 397–402 (1993). https://doi.org/10.1007/BF02759553
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02759553