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Sintering shrinkage of WC-Co materials with bimodal grain size distributions
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Physical Metallurgy.
2005 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 53, no 6, 1665-1671 p.Article in journal (Refereed) Published
Abstract [en]

Sintering shrinkage and densification rate were investigated for WC-Co materials with different grain size distributions. Unimodal distributions were compared to bimodal mixtures with size ratio close to four. A bimodal carbide mixture with 25% fine particles showed similar shrinkage behaviour to a material with unimodal distribution around the same mean value. With 50% fine particles the initial shrinkage was slightly faster than a unimodal material with the same mean size, while the late shrinkage was considerably slower. The effects of particle size distribution on particle packing and sintering are discussed, and the effect on viscosity modelled.

Place, publisher, year, edition, pages
2005. Vol. 53, no 6, 1665-1671 p.
Keyword [en]
sintering, cermets, microstructure, grain size distribution, low-density glasses, cemented carbides, liquid-phase, packing, spheres, powder, behavior, model, well
URN: urn:nbn:se:kth:diva-14592DOI: 10.1016/j.actamat.2004.12.016ISI: 000227572000007ScopusID: 2-s2.0-13844256839OAI: diva2:332633
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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