About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Materials
|
Presentation Title |
Ceramic Binder Jetting Additive Manufacturing: Effects of Granulation on Properties of Feedstock Powder and Printed and Sintered Parts |
Author(s) |
Guanxiong Miao, Wenchao Du, Mohammadamin Moghadasi, zhijian Pei, Chao Ma |
On-Site Speaker (Planned) |
Guanxiong Miao |
Abstract Scope |
Nanopowder could be beneficial for ceramic binder jetting additive manufacturing to achieve a high density on printed and sintered parts because of its high sinterability. However, the flowability of the nanopowder is poor because of the large interparticle cohesion. This poor flowability prohibits the application of nanopowder in ceramic binder jetting. In this study, to improve the flowability of nanopowder, alumina nanoparticles (300 nm) are granulated into micron-sized granules (53–90 µm) through spray freeze drying. The raw nanopowder and granulated powder are compared by characterizing their flowability, sinterability, and printability. Results show that the granulated powder has a much better flowability than the raw nanopowder while the superior sinterability of the nanopowder is maintained after granulation. The higher density and smaller surface roughness of the part printed with granulated powder indicate that the granulation improves the printability of the nanopowder. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |