Stability of Selected Submicron Refractory Dispersoids in Tungsten

  • W. R. Morcom
  • N. F. Cerulli


Tungsten-dispersed second-phase alloys (6.5 vol. %) were obtained from milled powder mixes by several consolidation techniques. Hot-compaction was established as a superior mode of consolidation with respect to retention of particle size and densificaron. Chemical and particle stability of the dispersoids in tungsten were investigated by thermogravimetric analysis and electron microscopy. Included in this investigation were thoria and the oxides, nitrides, and carbides of hafnium and zirconium. None of these refractory dispersions showed complete stability at all temperatures, although dispersions of <1.0-μ mean particle size were retained after 1-hr annealing at 2600°C in some compositions.


Tungsten Oxide Milled Powder Interparticle Spacing Tungsten Powder Complete Stability 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Brophy, J. H., L. A. Shepard, and J. Wulff, “Nickel Activated Sintering of Tungsten,” in: W. Leszynski (ed.), Powder Metallurgy, Interscience (New York), 1961, p. 113.Google Scholar
  2. 2.
    White, J. E., and M. M. Jurkowitz, “Hot Pressing of Tungsten Powder,” Contract No. AF04(695)-269, Rept. No. TDR-269(4240–10)-l, August, 1963.Google Scholar
  3. 3.
    White, J. E, “Tungsten Base Alloys Not Pressed from Elemental Powders,” Contract No. AF04(695)-269, Rept. No. TDR-269(4240–10)-13, June, 1964.Google Scholar
  4. 4.
    Charland, T. L., Design and Construction of a Hot Press, Mtls. Eng. Rept. No. 5711–4602, Westing-house Electric Corp., November, 1957.Google Scholar
  5. 5.
    Resnick, R., and R. Steinitz, DMIC Rept. No. 167, March, 1962, p. 67.Google Scholar
  6. 6.
    Ackermann, R. J., E. G. Rank, R. J. Thorn, and M. C. Cannon, J. Phys. Chem. 67: 762 (1963)CrossRefGoogle Scholar
  7. 7.
    Quatinetz, M, R. J. Schafer, and C. R. Smeal, “The Production of Submicron Metal Powders by Ball Milling with Grinding Aids,” in: W. E. Kuhn (ed.), Ultrafine Particles, John Wiley and Sons (New York), 1963, p. 271.Google Scholar
  8. 8.
    Sell, H. G., G. H. Keith, R. C. Koo, R. H. Schnitzel, and R. Corth, “Physical Metallurgy of Tungsten and Tungsten Base Alloys,” Contract No. AF33(616)-6933, Project No. 7351, WADD Tech. Rept. 60–37, May, 1961, pp. 73–74.Google Scholar

Copyright information

© Springer Science+Business Media New York 1966

Authors and Affiliations

  • W. R. Morcom
    • 1
  • N. F. Cerulli
    • 1
  1. 1.Lamp DivisionWestinghouse Electric CorporationBloomfieldUSA

Personalised recommendations