Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Powder Injection Molding of Alumina Parts Using a Binder System Based in Paraffin Wax and High Density Polyethylene

  • Thomas-Vielma, P. (Materials Science and Engineering Department. Universidad Carlos III de Madrid.Avda. de la Universidad, Chemistry and Materials Technologic Institute "Alvaro Alonso Barba") ;
  • Cervera, A. (Euroortodoncia. C/ Aeronauticas, 18. Poligono Industrial Urtinsa.) ;
  • Levenfeld, B. (Materials Science and Engineering Department. Universidad Carlos III de Madrid.Avda. de la Universidad, Chemistry and Materials Technologic Institute "Alvaro Alonso Barba") ;
  • Varez, A. (Materials Science and Engineering Department. Universidad Carlos III de Madrid.Avda. de la Universidad, Chemistry and Materials Technologic Institute "Alvaro Alonso Barba")
  • Published : 2006.09.24
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Abstract

In this experimental work, the development of a multicomponent binder system based on high density polyethylene (HDPE) and paraffin wax for Powder Injection Molding of Alumina $(Al_2O_3)$ parts was carried out. The optimum composition of the injection mixture was established through mixing torque measurements and a rheological study. The maximum powder loading was 58 vol%. The miscibility of organic components and the optimum injection temperature was evaluated by thermal characterization of binder and feedstock. The thermal debinding cycle was developed on the basis of thermogravimetrical analysis of the binder. After sintering the densities achieved were closed to 98% of the theoretical one.

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