ABSTRACT Nanoindentation tests were performed on the basal (0001) and prismatic (10ī0) surfaces
of tourmaline crystals. These results were used along with Vickers microhardness tests to
investigate the hardness of the material on these surfaces at different load regimes. It was
found that the (0001) surface indicated a higher hardness at ultra-low loads while (10ī0)
becomes the harder plane at higher loads. Evidence of plastic deformation at room
temperature in the otherwise very brittle (ceramic) material was also established, and the
elastic modulus was determined.
Cite this paper
M. Adeoye and O. Adewoye, "Nanoindentation Study on Tourmaline," Journal of Minerals and Materials Characterization and Engineering, Vol. 5 No. 1, 2006, pp. 63-72. doi: 10.4236/jmmce.2006.51004.
 Doerner, M. F. and Nix, W. D., J. Mater. Res., 1 (1986) 601.
Oliver, W. C. and Pharr, G. M., J. Mater. Res., 7 (1992) 1564.
Page, T. F., Oliver, W. C. and McHargue, C. J., J. Mater. Res., 7 (1992) 450.
Hainsworth, S. V., Ph. D. Thesis: Factors influencing the tribology of ceramic surfaces.
(University of Newcastle, England. 1993).
Hainsworth, S. V. and Page, T. F., J. Mater. Sci., 29 (1994) 5529.
Field, J. S. and Swain, M. V., J. Mater. Res., 10 (1995) 101.
Atkinson, M., J. Mater Sci., 30 (1995) 1728.
Hainsworth, S. V., Bartlett, T. and Page, T. F., Thin Solid Films, 236 (1993) 214.
Page, T. F. and Hainsworth, S. V., Surf. and Coat. Tech., 61 (1990) 201.
Hainsworth, S. V. and Page, T. F., Surf. and Coat. Tech., 68/69 (1994) 571.
Hay, J. L. and Pharr, G. M., in Mechanical Testing And Evaluation, eds. H. Kuhn and D.
Medlin, (ASM International, 2000) pp. 232-243.
Henry, D. J. and Guidotti, C. V., Am. Mineralogist, 70 (1985) 1.
Deer, W. A., Howie, R. A. and Zussman, J., Rock-Forming Minerals Vol. 1B: Disilicates
and Ring Silicates. 2nd edition. (Longman Group Ltd., London 1986).
Deer, W. A., Howie, R. A. and Zussman, J., An Introduction to the Rock-Forming
Minerals, (Longman Scientific and Technical, England. 1992).
Klein, C. and Hurlburt jr., C. S., Manual of Mineralogy, (New York, John Wiley and
Sons, Inc., 1993) Chapters 2 and 3.
Phillips, F. C., An Introduction to Crystallography, (English Language Book Society and
Longman Group Limited, 1971).
Dietrich, R. V., The Tourmaline Group, (New York, Van Nostrand Reinhold Company,
Adeoye, M. O., Ph.D. Thesis: Flow and Fracture in Tourmaline and Beryl Using
Indentation Techniques, (Obafemi Awolowo University, Ile-Ife. Nigeria, 1998).
Marshall, D. B., Lawn, B. R. and Evans, A. G., J. Am. Ceram. Soc. 65, (1982) 561.