About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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14th Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
|
Presentation Title |
Direct Selective Laser Sintering for Additive Manufacturing of Advanced Ceramic Materials |
Author(s) |
Bai Cui, Xiang Zhang, Fei Wang, Zhipeng Wu, Michael Nastasi, Yan Chen, Yongfeng Lu |
On-Site Speaker (Planned) |
Bai Cui |
Abstract Scope |
A direct selective laser sintering (SLS) process has been successfully developed by our team, which has been demonstrated as a novel and promising approach for additive manufacturing of various ceramic materials such as BaTiO3 and ZrC. Without use of polymer binders or resins, a dense ceramic layer could be formed with a thickness of several hundred of micrometers depending on the laser parameters and a relative density of higher than 97%, in which pores or microcracks are absent. The phase transformation during SLS has been investigated by X-ray and neutron diffractions. SLS can result in the formation of the metastable high-temperature phase, such as hexagonal BaTiO3, which is retained at room temperature possibly due to the ultrahigh cooling rate. The processing-microstructure-property relationship of the SLSed ceramics is revealed and discussed. |