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Features of the interaction of boron with molten aluminum

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Conclusions

  1. 1.

    In the reaction of solution of boron in molten aluminum during chemical interaction of boron fibers with molten aluminum, the properties of the fibers improve while in the reaction with the formation of aluminum borides they become poorer.

  2. 2.

    In liquid phase metallization of boron fibers at the aluminum coating-boron fiber interface the following phases are formed: a solid solution of boron in aluminum, AlB2 diboride, and the α-and β-modifications of AlB12 phase. Oxides and spinels were not detected at the fiber-coating interface.

  3. 3.

    Application of the matrix to the fiber by the continuous-casting method makes it possible to create a continuous interface of variable composition. Depending upon the degree of chemical interaction, the composition of the interface may be varied within wide limits without significant loss of strength of the fiber itself.

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Literature cited

  1. 1.

    A. S. Matusevich, Metal-Base Composite Materials [in Russian], Nauka i Tekhnika, Minsk (1978).

  2. 2.

    K. G. Kreider and K. M. Prevo, "Aluminum Strengthened with boron fibers," in: Composite Materials [in Russian], Vol. 4, Mashinostroenie, Moscow (1978), pp. 419–499.

  3. 3.

    M. Kh. Shorshorov, T. A. Chernyshova, L. I. Kobeleva, et al., "The coating of reinforcing fibers with aluminum alloys by the continuous-casting method," in: The Adhesion of Molten Metals and the Soldering of Materials [in Russian], No. 3, Naukova Dumka, Kiev (1978), pp. 95–99.

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    B. I. Semenov, E. I. Khanin, and Yu. B. Markevich, "A study of the conditions of solidification and formation of the structure of the aluminum matrix in production of cast boroaluminum braids, Fiz-Khim. Obrab. Mater., No. 1, 138–142 (1978).

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    M. Kh. Shorshorov (ed.), Fiber Composite Materials with a Metal Matrix [in Russian], Mashinostroenie, Moscow (1981).

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    E. D. Shchukin, "The reduction in surface energy and the change in mechanical properties of brittle bodies under the influence of the surrounding medium," Fiz.-Khim. Mekh. Mater., No. 1, 3–21 (1976).

  7. 7.

    A. M. Tsirlin, "Evaluating the quality of boron fibers from the morphological and fractographic characteristics," Fiz.-Khim. Obrab. Mater., No. 6, 78–91 (1978).

  8. 8.

    V. M. Nikitin, Physicochemical Phenomena in the Interaction of Liquid Metals on Solid Ones [in Russian], Atomizdat, Moscow (1969).

  9. 9.

    D. F. Elliot et al., The Thermal Chemistry of Steel Melting Processes [in Russian], Metallurgiya, Moscow (1969).

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Additional information

A. A. Baikov Institute of Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 21–24, August, 1984.

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Gevlich, S.O., Tylkina, M.I. & Chernyshova, T.A. Features of the interaction of boron with molten aluminum. Met Sci Heat Treat 26, 588–592 (1984). https://doi.org/10.1007/BF00707796

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Keywords

  • Aluminum
  • Solid Solution
  • Boron
  • Liquid Phase
  • Significant Loss