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The solid state portion of the Hf-Ta phase diagram


The solid state reactions in the Hf-Ta system were investigated by high-temperature X-ray diffraction, differential thermal analysis, and electron probe microanalysis. The results support a phase diagram with a monotectoid at about 40 at. pct Ta and an isotherm at 1083°C. A small miscibility gap was observed between about 40 and 80 at. pct Ta with a maximum temperature of about 1150°C.

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  1. L. L. Oden, D. K. Deardorff, M. I. Copeland, and H. Kato: U.S. Bureau of Mines R.I. 6521, 1964.

  2. V. N. Svechnikov, A. K. Shurin, and G. P. Dmitriyeva:J. Ukranian Acad. Sci., USSR, 1964, vol. 19, p. 206. Translation: NASA TT F-10280.

    Google Scholar 

  3. R. W. Carpenter, C. T. Liu, and P. G. Mardon:Met. Trans., 1971, vol. 2, p. 125.

    Article  CAS  Google Scholar 

  4. M. P. Krug, R. A. McCune, and R. A. Romans:J. Appl. Cryst., 1971, vol. 4, p. 151.

    Article  CAS  Google Scholar 

  5. W. B. Pearson:Handbook of Lattice Spacings and Structures of Metals and Alloys, vol. 2, Pergamon Press, New York, 1967.

    Google Scholar 

  6. E. Rudy and P. Stecher:J. Less-Common Metals, 1963, vol. 5, pp. 78–89.

    Article  CAS  Google Scholar 

  7. M. D. Silver, P. A. Farrar, and K. L. Komarck:Trans. TMS-AIME, 1963, vol. 227, pp. 876–84.

    CAS  Google Scholar 

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Krug, M.P., Oden, L.L. & Romans, P.A. The solid state portion of the Hf-Ta phase diagram. Metall Mater Trans A 6, 997–1002 (1975).

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  • Metallurgical Transaction
  • Differential Thermal Analysis
  • Thermal Arrest
  • Partial Phase Diagram
  • Mardon