Abstract
Immiscibilities between silica and lithium disilicate were investigated. Alpha particles ejected from 6Li atoms by thermal neutrons were used to autoradiograph surfaces representing diffusion-zone cross-sections. Etchant-enlarged alpha tracks in nitrocellulose disclosed the distribution of lithium. For autoradiography, procedural details were established, suitable operating conditions were selected, and the method was calibrated. For diffusion, adequate couples had to be prepared. Subsequent experiments indicated phase separations along an 885° C isotherm of the silica-lithium disilicate system. There was evidence of metastable compositions near 30, 25, 20, 16, 11, and 7 mol % of lithia in silica. These results have been given a very tentative interpretation: The first two compositions may correspond to metastable extensions of liquidus boundaries, projected through a eutectic point of the system. The third and sixth compositions are probably points on a liquid-liquid miscibility boundary, and the fourth and fifth compositions could be on an associated spinodal boundary.
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References
C. P. Bean, R. L. Fleischer, P. W. Swartz, and H. R. Hart Jr., J. Appl. Phys. 37 (1966) 2218.
J. S. Armijo and H. S. Rosenbaum, ibid 38 (1967) 2064.
N. A. Tiner, T. L. Mackay, S. K. Asunmaa, and R. O. Ingersoll, Trans. ASM 61 (1968) 195.
H. S. Rosenbaum and J. S. Armijo, J. Nucl. Matls., 22 (1967) 115.
J. D. Kleeman and J. F. Lovering, Science 156 (1967) 512.
G. Amsel and D. Samuel, J. Phys. Chem. Solids 23 (1962) 1707.
R. W. Ollerhead, E. Almqvist, and J. A. Kuehner, J. Appl. Phys. 37 (1966) 2440.
G. Amsel, G. Béranger, B. De Gélas, and P. Lacombe, ibid 39 (1968) 2246.
R. L. Fleischer, P. B. Price, and R. M. Walker, Phys. Rev. 133 (1964) A1443.
P. B. Price and R. M. Walker, J. Appl. Phys. 33 (1962) 3400.
Idem, ibid 3407.
R. L. Fleischer, P. B. Price, and R. M. Walker, Rev. Sci. Instr. 37 (1966) 525.
J. H. Davies and R. W. Darmitzel, Nucleonics 23 (1965) 86.
E. V. Benton, US Naval Radiological Defense Lab., Rept. TR-68-14, San Francisco, 1968; Defense Doc. Center No. AD 666543.
J. I. Paige, H. M. Harris, and H. J. Kelly, US Bureau of Mines, Rept. RI 6651, Washington, DC, 1965.
F. C. Kracek, J. Phys. Chem. 34 (1930) 2641.
R. J. Charles, J. Amer. Ceram. Soc. 50 (1967) 631.
M. J. Buerger, Zeits. Krist. 90 (1935) 186.
Idem, Am. Mineral. 39 (1954) 600.
Idem, Fortschr. Mineral. 39 (1961) 4.
R. B. Sosman, “The Phases of Silica” (Rutgers Univ. Press, New Brunswick, New Jersey, 1965) p. 56.
F. P. Glasser, Phys. and Chem. of Glasses 8 (Dec. 1967) 224.
F. N. Rhines, in “Surface Treatment of Metals” (Am. Soc. for Metals, Metals Park, Ohio, 1941) p. 123.
J. W. Cahn, J. Chem. Phys. 42 (1965) 93.
Idem, Trans. AIME 242 (1968) 166.
L. S. Darken, ibid 180 (1949) 430.
Idem, in “Atom Movements” (Am. Soc. for Metals, Metals Park, Ohio, 1951) pp. 20–23.
W. Jost, “Diffusion in Solids, Liquids, Gases” (Academic Press, New York, 1952) pp. 68–77 and 160–163.
N. S. Andreev, D. A. Goganov, E. A. Poraikoshits, and Yu. G. Sokolov, in “The Structure of Glass, vol. 3. Catalyzed Crystallisation of Glass” (Consultants Bureau, New York, 1964) p. 47.
Y. Moriya, D. H. Warrington, and R. W. Douglas, Phys. and Chem. of Glasses 8 (Feb. 1967) 19.
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Wood, F.W., Robinson, A.H. Neutron-induced autoradiography of lithium silicate glasses. J Mater Sci 5, 425–433 (1970). https://doi.org/10.1007/BF00550005
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DOI: https://doi.org/10.1007/BF00550005