About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
14th Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
|
Presentation Title |
In-situ Observation of Evolution of Internal Structure of Alumina Slurry During Drying by Optical Coherence Tomography |
Author(s) |
Hiromasa Kuroda, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi |
On-Site Speaker (Planned) |
Hiromasa Kuroda |
Abstract Scope |
In the wet-shaping process of ceramics, it is significant to understand the change in the internal structure of the slurry during drying to suppress the cracking and deformation of green bodies. In this study, the evolution in the internal structure of ceramic slurry during drying was clarified using optical coherence tomography (OCT), which can visualize the inside of opaque objects with high speed and high resolution. OCT observation of sheets prepared using dispersed and agglomerated slurries was carried out during drying by heating with infrared lamps. In the early stage of drying, the OCT signal of the dispersed slurry was fluctuating because of Brownian motion, and its sheet shrunk homogeneously, while the agglomerated slurry showed large regions were observed moving in different directions during drying and shrank inhomogeneously. Cracking in the final stage of drying was probably caused by non-uniform stress, considering the inhomogeneity of the OCT images. |