Poh, L., Della, C. , Ying, S., Goh, C. and Li, Y. (2018) Powder distribution on powder injection moulding of ceramic green compacts using thermogravimetric analysis and differential scanning calorimetry. Powder Technology, 328, pp. 256-263. (doi: 10.1016/j.powtec.2017.12.078)
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Abstract
Powder-binder separation during injection moulding causes defects such as cracking, warpage or anisotropic shrinkage during firing. In this paper, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) that were previously used to analyse powder distribution within the green body for metal injection moulding are used for ceramics. TGA and DSC are used to characterize the mass loss and heat of fusion of the binder system, silicon nitride feedstock and test-bars. TGA can measure the volume fraction of powder in green parts directly with 1.76 vol% difference from nominal volume fraction and variations up to 0.177 vol%. The DSC empirical model predicted volume fraction of powder in green parts with 1.76 vol% difference from nominal volume fraction and variations up to 1.710 vol%. Using rule of mixture, it over predicted volume fraction of powder in green parts by 6.78 vol% from nominal volume fraction and with variations up to 2.510 vol%.
| Item Type: | Articles |
|---|---|
| Additional Information: | This research is supported by the Economic Development Board of Singapore under grant, COY-15-IPP/130016, to Dou Yee Technologies Pte Ltd. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Goh, Dr Cindy Sf and Della, Dr Christian and Li, Professor Yun and Poh, Ping Yi Leslie |
| Authors: | Poh, L., Della, C., Ying, S., Goh, C., and Li, Y. |
| College/School: | College of Science and Engineering > School of Engineering College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Powder Technology |
| Publisher: | Elsevier |
| ISSN: | 0032-5910 |
| ISSN (Online): | 1873-328X |
| Published Online: | 02 January 2018 |
| Copyright Holders: | Copyright © 2017 Elsevier B.V. |
| First Published: | First published in Powder Technology 328: 256-263 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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