Solid or liquid phase sintering of nanocrystalline WC/Co hardmetals

P. Arató, L. Bartha, R. Porat, S. Berger, A. Rosen

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Nanocrystalline WC/Co hardmetal powder has been sintered at various temperatures in vacuum and HIP sintered under different pressures. In addition, hot stage optical microscopy (HSM) and differential thermal analysis (DTA) was performed on a similar powder. All the results indicate that the matrix of the nanopowder starts to melt at about 1150°C; however, the melting is confined to locations that are still nanocrystalline. With increasing temperature, more material melts and at about 1330°C the melting of the matrix is complete. High density can be achieved below this temperature, but not below 1200°C. Compared with previous sintering results on micron sized powder, the conclusion is that the nanopowder densifies mostly in the solid state, while the latter mostly in the liquid state.

Original languageEnglish
Pages (from-to)245-255
Number of pages11
JournalNanostructured Materials
Volume10
Issue number2-8
Publication statusPublished - Feb 1998

Fingerprint

liquid phase sintering
Liquid phase sintering
Powders
solid phases
Melting
melting
hot isostatic pressing
Hot isostatic pressing
matrices
Temperature
Differential thermal analysis
Optical microscopy
temperature
sintering
thermal analysis
Sintering
Vacuum
microscopy
solid state
vacuum

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Arató, P., Bartha, L., Porat, R., Berger, S., & Rosen, A. (1998). Solid or liquid phase sintering of nanocrystalline WC/Co hardmetals. Nanostructured Materials, 10(2-8), 245-255.

Solid or liquid phase sintering of nanocrystalline WC/Co hardmetals. / Arató, P.; Bartha, L.; Porat, R.; Berger, S.; Rosen, A.

In: Nanostructured Materials, Vol. 10, No. 2-8, 02.1998, p. 245-255.

Research output: Contribution to journalArticle

Arató, P, Bartha, L, Porat, R, Berger, S & Rosen, A 1998, 'Solid or liquid phase sintering of nanocrystalline WC/Co hardmetals', Nanostructured Materials, vol. 10, no. 2-8, pp. 245-255.
Arató P, Bartha L, Porat R, Berger S, Rosen A. Solid or liquid phase sintering of nanocrystalline WC/Co hardmetals. Nanostructured Materials. 1998 Feb;10(2-8):245-255.
Arató, P. ; Bartha, L. ; Porat, R. ; Berger, S. ; Rosen, A. / Solid or liquid phase sintering of nanocrystalline WC/Co hardmetals. In: Nanostructured Materials. 1998 ; Vol. 10, No. 2-8. pp. 245-255.
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