Skip to main content
SpringerLink
Log in

Reactions of lanthanum hexaboride with carbides and borides of refractory metals

  • Test Methods and Properties of Materials
  • Published:
Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

  1. 1.

    A study was made of the solid-phase reactions of lanthanum hexaboride with the monocarbides (TiC, NbC, WC) and diborides (TiB2, NbB2) of the d transition metals.

  2. 2.

    It was established that the reactions of LaB6 with me carbides are accompanied by the destruction of the Me-C bonds and formation of the thermodynamically more favorable Me-B bonds. In the system LaB6-NbC, the niobium monocarbide fully decomposes and the resultant structure consists of two phases, based on LaB6 and NbB2. The structure in me system LaB6-TiC is composed of LaB6, TiB2, and TiC base phases, and that in the system LaB6-WC, of LaB6, W2C, andα-WB base phases.

  3. 3.

    The increased microhardness of the LaB6-base phases in all the systems investigated is a consequence of dissolution of the d transition metals in the lanthanum hexaboride.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Literature cited

  1. R. Lenk, Czech. Phys. J.,6, 625 (1956).

    Google Scholar 

  2. H. Ahmed, Transactions of a European Congress on Electron Microscopy, Engineering Department, Cambridge University, England (1972).

    Google Scholar 

  3. S. P. Kapitsa, V. P. Bykov, and V. N. Melekhin, Zh. Éksperim. i Teor. Fiz.,39, 997 (1960).

    Google Scholar 

  4. G. A. Kudintseva, G. M. Kuznetsova, and V. V. Nikulov, Radiotekhn. i Élektron.,12, No. 5, 857 (1967).

    Google Scholar 

  5. E. A. Trofimov, V. F. Artsikhovich, et al., Élektronnaya Tekhn., Ser. 6, Materialy, No. 1, 130 (1972).

    Google Scholar 

  6. V. M. Glazov and V. N. Vigdorovich, Microhardness of Metals [in Russian], Metallurgiya, Moscow (1969).

    Google Scholar 

  7. P. P. Budnikov and A. M. Gistling, Reactions in Mixtures of Solids [in Russian], Litstroiizdat, Moscow (1971).

    Google Scholar 

  8. A. A. Ivan'ko, A Handbook of Hardness [in Russian], Naukova Dumka, Kiev (1968).

    Google Scholar 

  9. G. V. Samsonov, L. Ya. Markovskii, et al., Boron and Its Compounds and Alloys [in Russian], Izd-vo AN UkrSSR, Kiev (1960).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Materials Science, Academy of Sciences of the Ukrainian SSR, USSR

    A. I. Kondrashov

Authors
  1. A. I. Kondrashov
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated from Poroshkovaya Metallurgiya, No. 11(143), pp. 58–60, November, 1974.

The author wishes to thank Academician G. V. Samsonov* for his interest in this work.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kondrashov, A.I. Reactions of lanthanum hexaboride with carbides and borides of refractory metals. Powder Metall Met Ceram 13, 911–913 (1974). https://doi.org/10.1007/BF00803196

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00803196

Keywords

Search

Navigation