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Pulvergemisch für die Herstellung metallischer und/oder keramischer Bauteile, Verfahren zur Herstellung des Pulvergemischs sowie Verfahren zur Herstellung von Bauteilen

Powder mixture, useful to produce metallic/ceramic sintered components, which are formed from two fractions, where one of the fraction is made of regular or spherical shaped particles, and other fraction is made of plate-shaped particles
 
: Scholl, Roland; Slawik, Tim; Scheithauer, Uwe

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Frontpage ()

DE 102012020829 A1: 20121016
German
Patent, Electronic Publication
Fraunhofer IKTS ()

Abstract
DE102012020829A1 Die Erfindung betrifft ein Pulvergemisch fuer die Herstellung metallischer, keramischer sowie metall-keramischer Bauteile. Ein Verfahren zur Herstellung des Pulvergemischs sowie die Herstellung von mit dem Pulvergemisch hergestellten gesinterten Bauteilen. Das erfindungsgemaesse Pulvergemisch ist aus mindestens zwei Fraktionen A und B gebildet. Dabei ist eine Fraktion A aus ueberwiegend regulaer oder sphaerisch geformten Partikeln und mindestens eine weitere Fraktion B aus plaettchenfoermigen Partikeln eines metallischen und/oder keramischen Werkstoffs gebildet.

 

Powder mixture for producing metallic and/or ceramic sintered components, which are formed from at least two fractions A and B, is claimed. The fraction A is made of regular or spherical shaped particles, and the fraction B is made of plate-shaped particles of a metallic and/or ceramic material. An independent claim is included for producing fractions of a powder mixture, comprising carrying out the regular or spherical particles of the powder for the fraction A by gas atomization or by processing the regular or spherical metallic particles in an attritor using solvents to the metallic platelet-shaped particles, which are processed in a further milling step in a planetary ball mill in the presence of a grinding aid, preferably a hydrocarbon compound, again to the regular or spherical metallic particles with altered filling- and pressing properties in comparison to the initial state, obtaining the metallic plate-shaped particles of the fraction B by grinding process, preferably by attritor milling and using solvents from the regular or spherical particles, and obtaining the ceramic plate-shaped particles from the spherical ceramic particles, which are broken off by mechanical processing of the sintered body.

: http://publica.fraunhofer.de/documents/N-311054.html