Abstract
Analytical transmission electron microscopy (TEM) studies of a dental gallium alloy have been carried out. This commercial Ga alloy was made by triturating a Ag-Sn-Cu-rich alloy powder with a liquid Ga alloy containing Ga, In and Sn. Ga alloys are of increasing interest as an alternative to amalgam. The dental material studied in the present work was found to be a composite consisting of remaining, undissolved particles from the Ag-based alloy powder in a matrix of reaction products with the liquid Ga alloy. The phases in the matrix and the remaining Ag-based alloy particles have been identified by electron diffraction, high resolution electron microscopy and energy dispersive X-ray spectroscopy. the following phases were identified: orthorhombic Ag3Sn, cubic γ-Cu9Ga4, cubic Ag9In4, tetragonal β-Sn and hexagonal Ag2Ga. In addition to these well-known phases Ga-rich regions of Cu-Ga were observed consisting of an intergrowth of the tetragonal CuGa2 and one of the cubic γ-Cu9Ga4 phases.
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PUTTKAMMER. Zahnärztliche Rundschau 35 (1928) 1450.
D. L. SMITH and H. J. CAUL, J. Amer. Dent. Assoc. 53 (1956) 315.
National Institute of Health, in “Report from Technical Assessment Conference on Effects and Side Effects of Dental Restorative Materials” (Washington DC, August 1992).
R. C. WEAST (Ed.), “Handbook of physics and chemistry” (CRC Press Inc., Boca Raton, FL, 1986).
L. K. MASH, B. H. MILLER, H. NAKAJIMA, S. M. COLLARD and T. OKABE, J. Dent. Res. 71 (1992) 570.
T. OKABE, M. K. WOLDU and H. NAKAJIMA, J. Dent. Res. 70 (1991) 343.
H. NAKAJIMA, B. H. MILLER, T. OKABE, J. Dent. Res. 71 (1992) 570.
T. OKABE, M. WOLDU, H. NAKAJIMA, B. H. MILLER and L. K. MASH, J. Dent. Res. 71 (1992) 688.
R. JøRGENSEN, H. HERø, M. SYVERUD and L. SHUIPING, J. Dent. Res. 73 (1993) 981.
International Organization for Standardization, ISO 1559 “Alloys for dental amalgam”, 2nd Edn (Geneva, Switzerland 1986).
H. HERø, C. J. SIMENSEN and R. B. JøRGENSEN, Biomaterials (1995) submitted.
C. W. FAIRHURST and J. B. COHEN, Acta Crystallogr. B 28 (1972) 371.
G. CLIFF and G. W. LORIMER, in Proceedings of the 5th. European Congress on Electron Microscopy (Institute of Physics, Bristol, 1972) p. 140.
A. OLSEN, in “The theory and practice of analytical electron microscopy in materials science” (Department of Physics, University of Oslo, Oslo, 1992).
R. STOKHUYZEN, J. K. BRANDON, P. C. CHIEH and W. B. PEARSON, Acta Crystallogr. B 30 (1974) 2910.
T. B. MASSALSKI, J. L. MURRAY, L. H. BENNET and H. BAKER, in “Binary alloy phase diagrams” (American Society for Metals, Ohio, 1986).
F. WEIBKE, Z. anorg. chem. 220 (1934) 293.
E. ZINTL and O. TREUSCH, Z. Physik. Chem. B 34 (1936) 225.
J. O. BETTERTONJr. and W. SCHUBERT, J. Inst. Metals 80 (1951–1952) 459.
M. EL-BORAGY and K. SCHUBERT, Zeit. für Metall. 63 (1972) 52.
J. K. BRANDON, R. Y. BRIZARD, W. B. PEARSON and D. J. N. TOZER, Acta Crystallogr. B 33 (1977) 527.
V. T. DESHPANDE and D. B. SIRDESHMUKH, Acta Crystallogr. 14 (1961) 355.
K. KOMATSU and K. TERAMOTO. J. Phys. Soc. Jpn. 21 (1966) 1152.
R. P. STRATTON and W. J. KITCHINGMAN, Acta Crystallogr. 17 (1964) 1471.
P. VILLARS and L. D. CALVERT, in “Pearson's handbook of crystallographic data for intermetallic phase” (American Society for Metals, Ohio, 1985).
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Gunnæs, A.E., Olsen, A. & Herø, H. Transmission electron microscopy study of a dental gallium alloy. J Mater Sci: Mater Med 7, 447–455 (1996). https://doi.org/10.1007/BF00122015
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DOI: https://doi.org/10.1007/BF00122015