Process	Sintering
	Sintering is the most common technique for consolidating powders. Essentially, it is the removal of the pores between the starting particles, combined with their growth and strong mutual bonding. The process is carried out by heating up the "green" part at about 80% of the melting temperature, until full strength is obtained (10 min. to several hours). The biggest problem of this technique is shrinkage which causes cracking and distortion. There are many methods for sintering a component. The most important are: vapour-phase sintering; solid-state sintering; liquid-phase sintering; reactive liquid sintering. Overpressure sintering uses also pressure to accelerate densification.
Danish Name	Sintring
Category	Mass conserving processes, Powder technology
Materials	Ceramics Metal powders Cermet
Typical products	Filter for ultrafiltration Grinding tool
Competing processes	Reaction forming
References	Dansk Sintermetal A/S Modern Ceramic Engineer
Photo	Thomas Nissen (Compuer graphics)
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