Sintering of tungsten carbide with/without cobalt and nano tungsten carbide powder in fast

Sinthu Chanthapan, Anil Kamalakant Kulkarni, Jogender Singh, Pankaj Mehrotra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Binderless tungsten carbide (WC) with 0.1, 0.4, and 1.2 μm powder size was sintered successfully by field assisted sintering technology (FAST). Density values above 98% were achieved at 1500oC under 65 MPa pressure. The relative density of sintered 0.1 μm WC powder was around 97% with hardness value as high as 95-96 HRA. WC-6wt.%Co with 4 μm powder size was sintered to 99% relative density at relatively low temperature, 1280oC, (100-200oC lower than that of pressureless sintering). Significant increase in hardness (3-4 HRA) was observed. By addition of nano WC powder in WC-6wt.%Co, the hardness value was improved, while fracture toughness decreased slightly. It is shown that engineering the microstructure of WC materials is possible by mixing initial powder sizes, then sintering in FAST.

Original languageEnglish (US)
Title of host publicationProceedings of the 8th International Conference on Tungsten, Refractory and Hardmaterials
Pages1016-1027
Number of pages12
StatePublished - Dec 1 2011
Event8th International Conference on Tungsten, Refractory and Hardmaterials 2011 - San Francisco, CA, United States
Duration: May 18 2011May 21 2011

Publication series

NameProceedings of the 8th International Conference on Tungsten, Refractory and Hardmaterials

Other

Other8th International Conference on Tungsten, Refractory and Hardmaterials 2011
CountryUnited States
CitySan Francisco, CA
Period5/18/115/21/11

All Science Journal Classification (ASJC) codes

  • Metals and Alloys
  • Surfaces and Interfaces

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    Chanthapan, S., Kulkarni, A. K., Singh, J., & Mehrotra, P. (2011). Sintering of tungsten carbide with/without cobalt and nano tungsten carbide powder in fast. In Proceedings of the 8th International Conference on Tungsten, Refractory and Hardmaterials (pp. 1016-1027). (Proceedings of the 8th International Conference on Tungsten, Refractory and Hardmaterials).