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Titel:
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New trends in powder injection moulding
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Auteur(s):
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Gepubliceerd door:
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Publicatie datum:
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ECN
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1998
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ECN publicatienummer:
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Publicatie type:
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ECN-RX--98-018
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Artikel wetenschap tijdschrift
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Aantal pagina's:
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19
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Gepubliceerd in: Paper, presented on the International symposium on "Functionally graded composites, held in Kiev, May 19-22, 1998" (), , , Vol., p.-.
Samenvatting:
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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