Stress relief mechanism in layer-wise laser directly sintered porcelain ceramics

The influence of laser sintering parameters on the temperature in the interaction zone between laser and ceramic materials has been experimentally studied. High energy density and small hatching space cause an increase of sintering temperature and a decrease of mechanical strength for the final porc...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2010-03, Vol.527 (7), p.1695-1703
Main Authors: Tian, Xiaoyong, Sun, Bo, Heinrich, Jürgen G., Li, Dichen
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Ceramics
Chemical industry and chemicals
Creep
Exact sciences and technology
Finite element analysis
General studies
Heavyclay products, whiteware
Laser sintering
Lasers
Layered structures
Mathematical models
Porcelain
Residual stresses
Sintering
Solid freeform processes
Stress distribution
Stresses
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Summary:The influence of laser sintering parameters on the temperature in the interaction zone between laser and ceramic materials has been experimentally studied. High energy density and small hatching space cause an increase of sintering temperature and a decrease of mechanical strength for the final porcelain components after being post treated in a furnace. A stress relief mechanism has been put forward to explain this relationship between process parameters and final properties. A numerical model for the laser sintering process has been established to simulate the temperature and stress distribution and validate the stress relief mechanism by comparing it with experimental results.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2009.10.058