Paper Title:
Application of PEG/PMMA Binder for Powder Injection Moulding of Hardmetals
  Abstract

Powder injection moulding (PIM) is a cost effective powder metallurgical process for the fabrication of small, complex-shaped components for high performance applications. A binder system, which comprises a major fraction of polyethylene glycol (PEG) and a minor fraction of a very finely dispersed polymethyl methacrylate (PMMA), has been applied for tungsten carbide (WC) – cobalt (Co) hardmetal powders. PEG can be removed rapidly by water leaching and PMMA is removed by subsequent pyrolysis when the components are ramped up to the sintering temperature. In this work, the development of feedstock formulations and of the processing parameters for a successful injection moulding and to achieve high density has been investigated. The present study has demonstrated that the binder can be employed for the production of WC-Co hardmetal components by PIM process. The maximum density achieved thus far is 97% of the theoretical value.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
953-956
DOI
10.4028/www.scientific.net/MSF.561-565.953
Citation
N. Chuankrerkkul, H. A. Davies, P. F. Messer, "Application of PEG/PMMA Binder for Powder Injection Moulding of Hardmetals", Materials Science Forum, Vols. 561-565, pp. 953-956, 2007
Online since
October 2007
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