Selektives Laserschmelzen zur generativen Herstellung von Bauteilen aus hochfester Oxidkeramik

An additive manufacturing technique based on selective laser melting (SLM) for zirconia-alumina ceramic is presented. SLM is a powder bed based layer manufacturing technique that allows for rapid manufacturing of complex shaped objects directly from CAD data. By completely melting a purely ceramic zirconia-alumina powder mixture using a laser beam, objects of almost 100% density and a flexural strength of more than 500 MPa were manufactured. In order to avoid crack formation, the ceramic is preheated to a temperature above 1600°C during the build-up process. For preheating, the respective area of the powder bed is irradiated using a CO2 laser. The best results were achieved using a material composition of 41.5 wt% zirconia and 58.5 wt% alumina (eutectic mixture). Manufactured objects have a fine-grained two-phase microstructure consisting of tetragonal zirconia and alpha-alumina.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2009

Author dc:creator

• Wilkes, Jan Ingo

Contributors dc:contributor

• Poprawe, Reinhart

• info:eu-repo/classification/ddc/620
• Laser
• Zirkoniumdioxid
• Aluminiumoxide
• Prototyp
• Zahnersatz
• Keramik
• Fertigungstechnik
• Rapid Prototyping
• Dispersionskeramik
• Ingenieurwissenschaften
• Zirkonoxid
• Aluminiumoxid
• Prototypen
• Selektives Lasersintern
• Fraunhofer-Institut für Lasertechnik
• selective laser melting
• selective laser sintering
• alumina
• zirconia
• rapid manufacturing

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-113663%22

OAI record oai:identifier

https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A51362