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ECN publicatie:
New trends in powder injection moulding
Gepubliceerd door: Publicatie datum:
ECN 1998
ECN publicatienummer: Publicatie type:
ECN-RX--98-018 Artikel wetenschap tijdschrift
Aantal pagina's:

Gepubliceerd in: Paper, presented on the International symposium on "Functionally graded composites, held in Kiev, May 19-22, 1998" (), , , Vol., p.-.

Powder injection moulding (PIM) is a rapidly growing technology forproducing complex geometry, net shaped components from ceramics, metals, hard metals and intermetallics. The shaping of ceramic powders using injection moulding is very flexible with regard to the form complexity of the structural parts. This form flexibility combined with process and sintering control leads to net or near net shape production possibilities. Therefore, expensive finishing of sintered components can be reduced to a minimum or totally eliminated. This potential for ceramic injection moulding (CIM) has led in the recent past to intensified international research and development. A number of new binder systems have been developed, i.e. polyacetate-based, PEG-polymer based, acrylic-polymer based, agarose-based, etc. The development in the area of new binder composition was parallel assisted by a significant improvement in debinding processes. New debinding systems have been developed, i.e. computer assisted thermal debinding, extraction debinding, catalytic debinding, or even freeze drying or microwave assisted drying. These developments have significantly shortened the debinding time from days to hours, lowered the emission of undesirable volatile organic by-products to a minimum, and practically eliminated the formation of defects during the debinding process. 20 refs.

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