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Journal of Materials Science

, Volume 27, Issue 16, pp 4381–4388 | Cite as

Development of temperature-heating rate diagrams for the pyrolytic removal of binder used for powder injection moulding

  • I. E. Pinwill
  • M. J. Edirisinghe
  • M. J. Bevis
Papers

Abstract

A polypropylene-based binder system was used to injection mould test bars containing 65 vol% aluminium powder. Specimens, 3 and 6 mm thick, made from these bars were used for pyrolytic binder removal experiments in static air and nitrogen. The development of a carefully defined experimental procedure for the determination of the heating rate at which binder removal can be carried out at a given temperature without the creation of macro defects is fully described. The use of isothermal heat treatments during pyrolysis are also considered and results are presented as temperature-heating rate diagrams for each atmosphere and thickness investigated. These diagrams show a lower and an upper boundary. Defect formation occurs if the temperature-heating rate relationship lies between the boundaries. Near optimum binder removal schedules deduced from each diagram have been experimentally verified.

Keywords

Pyrolysis Defect Formation Injection Mould Aluminium Powder Removal Experiment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • I. E. Pinwill
    • 1
  • M. J. Edirisinghe
    • 1
  • M. J. Bevis
    • 1
  1. 1.Department of Materials TechnologyBrunel UniversityUxbridgeUK

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