|About this Abstract
||Materials Science & Technology 2019
||Sintering and Related Powder Processing Science and Technologies
||In-situ Observation of the Internal Structure of an Alumina Green Body during Sintering by Optical Coherence Tomography
||Junichi Tatami, Fumika Sakamoto, Takuma Takahashi, Motoyuki Iijima
|On-Site Speaker (Planned)
The change in the internal structure of ceramics during sintering should give us a lot of important information to make better ceramics. For in-situ observation of sintering, a imaging technique with high speed, high resolution, 3-dimensional observation at high temperatures is required. In this study, internal structure of an alumina green body during sintering was directly observed by optical coherence tomography. Relative density calculated from the shrinkage observed by OCT agreed with that from the actual measurement. Inhomogeneous region appeared and disappeared during sintering. A green body having layered structure largely deformed and imperfectly recovered during sintering, followed by cracking inside. It was also found that the green body expanded, and broke during heating during dewaxing. Consequently, it was shown that OCT is a powerful tool to evaluate the internal structure of ceramics.
||Definite: At-meeting proceedings