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Verfahren zur Herstellung von Siliziumnitridsinterkoerpern hoher Festigkeit und Zaehigkeit

Process for the production of silicon nitride sintered bodies of high strength and toughness
 
: Herrmann, M.; Kessler, S.; Schubert, C.

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Frontpage ()

DE 1991-4126510 A: 19910808
DE 1991-4126510 A: 19910808
DE 4126510 B1: 19970213
C04B0035
Deutsch
Patent, Elektronische Publikation
Fraunhofer IKTS ()

Abstract
Silicon nitride sintered bodies are mainly used in mechanical engineering. They are specially suitable for wear parts or as cutting ceramics. Known materials have relatively low strength and fracture toughness. Silicon nitride ceramics according to the invention can be produced by using silicon nitride powder consisting of 0-85 percent silicon nitride powder with a medium crystallite size of <= 0.2 microns and a maximum crystallite size (d<-97) of 0.4 microns, whereby the crystallites can have an elongated shape (degree of elongation A: length/thickness > 1).

: http://publica.fraunhofer.de/dokumente/PX-39357.html