About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-Based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Functional Defects in Advanced Ceramics Fabricated by Selective Laser Sintering |
| Author(s) |
Bai Cui, Lanh Trinh, Xiang Zhang, Fei Wang, Luke Wadle, Haoyu Dong, Yongfeng Lu |
| On-Site Speaker (Planned) |
Bai Cui |
| Abstract Scope |
Direct selective laser sintering (SLS) process is a novel and promising approach for additive manufacturing of various ceramic materials such as BaTiO3 and compositionally complex carbides. Without polymer binders or resins, a dense ceramic layer could be formed with a thickness of several hundred micrometers in which pores or microcracks are absent. The SLS process may induce ultrafast densification, metastable phase transformation, and extraordinary defects. For example, a Ti-rich secondary phase was distributed at grain boundaries of the SLSed hexagonal BaTiO3, while cellular structures with element segregation and dislocations on cell boundaries were observed in SLSed (Zr,Nb,Ta,Ti,W)C. This talk will discuss the new phenomenon and fundamental questions related to the defect formation during SLS of advanced ceramics. |