5. Sintering
5.1 Theoretical aspects
The sintering stage is the final step in the PIM process. During this stage, the part, which has been left porous by debinding, is heated to consolidate and densify it. This densification is accompanied by a volume shrinkage that depends on the initial composition of the feedstock.
In all cases, the sintering operation takes place at a temperature such that the material is not completely molten. A distinction is made, however, between the case where the entire material is in a solid state (solid phase sintering) and the case where part of the material has reached its melting point (liquid phase sintering) (
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Sintering
Bibliography
Events
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Congress organized by EPMA: EuroPM, held every year in Europe
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Congress organized by the Metal Powder Industries Federation: PowderMet takes place every year in the USA
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Patents
SCHWARTZWALDER (K.), Refractory body and method of making same, US Patent 2122960 (1938).
SMITH (D.J.), SHAPPIE (T.B.), SANFORD (R.A.), LIESZ (R.J.), Tungsten-carbide articles made by metal injection molding and method, US Patent 6790252 (2004).
MIYASHITA (T.), UENO (Y.), NISHIO (H.), KUBODERA (S.), Method for removing the dispersion medium from a molded pulverulent material, US...
Directories
Manufacturers – Suppliers – Distributors (non-exhaustive list)
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Feedstocks
BASF
Polymer Chemie
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Statistical and economic data
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Breakdown of sales between MIM and CIM industries
Data taken from German's work [6], see figures 1 and
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