Analysis of Powder Binder Separation through Multiscale Computed Tomography

• Main Authors: Shidi Yang, Qiaoli Xu, Chengcheng Liu, Xin Lu, Xuanhui Qu, Ying Xu
• Format: Article
• Language: English
• Published: MDPI AG 2019-03-01
• Series: Metals
• Subjects: green body; powder binder separation; CT test; mold filling
• Online Access: http://www.mdpi.com/2075-4701/9/3/329

In this study, X-ray computed tomography was used to analyze powder binder separation in TC4 green bodies. Firstly, for the scanned results of the whole green body, because of the relative low resolution (36 µm), the powder binder separation can only be analyzed by using gray value distribution. Then, local regions (areas near the gate and the central parts) were scanned by using a much higher resolution (2.3 µm). Both of the volume fraction of powder content and gray value distributions indicate that powder particles tend to accumulate in the central parts. Finally, based on the results tested by using submicron resolution (0.8 µm), the effects of the volume and morphology of the powder particles on the powder binder separation were analyzed.