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Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis
| Title: | Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis |
| Authors: | Niu, Jing Browse this author | | Harada, Kazuto Browse this author | | Suzuki, Shota Browse this author | | Nakatsugawa, Isao Browse this author | | Okinaka, Noriyuki Browse this author | | Akiyama, Tomohiro Browse this author →KAKEN DB |
| Keywords: | SiAlON | | Gas-solid reactions | | Salt-assisted | | Phase composition | | Microstructure |
| Issue Date: | 15-Aug-2014 |
| Publisher: | Elsevier |
| Journal Title: | Journal of Alloys and Compounds |
| Volume: | 604 |
| Start Page: | 260 |
| End Page: | 265 |
| Publisher DOI: | 10.1016/j.jallcom.2014.03.145 |
| Abstract: | High-quality Y-and Ca-α/β-SiAlON and α-SiAlON ceramics were synthesized via salt-assisted combustion synthesis from Si, Al, and metal oxide (Y2O3 and CaO) with the addition of NaCl and MgCl2 under a nitrogen pressure of 1 MPa. NaCl and MgCl2 were employed as they act as excellent diluents that effectively absorb the reaction heat through melting and evaporation. We found that the type of metal chlorides employed significantly affected the α/β ratio and the morphology of the product, with the use of NaCl affording high α/β ratios and equiaxed morphologies, while the use of MgCl2 resulting in low α/β ratios and elongated grains. The results of this work suggest that high-purity α/β-SiAlON composite products of intended α/β ratios can be successfully fabricated by controlling the initial metal chloride content. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/56796 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 秋山 友宏
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