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Magnetic softening of Co doped α"-Fe16N2 containing residual Fe-Co alloy prepared in low temperature nitridation
| Title: | Magnetic softening of Co doped α"-Fe16N2 containing residual Fe-Co alloy prepared in low temperature nitridation |
| Authors: | Masubuchi, Yuji Browse this author →KAKEN DB | | Sato, Hiroaki Browse this author | | Motohashi, Teruki Browse this author | | Kikkawa, Shinichi Browse this author |
| Keywords: | Iron nitride | | α''-Fe16N2 | | Ammonolysis | | Magnetic coercivity | | XRD | | XAFS |
| Issue Date: | Apr-2014 |
| Publisher: | Ceramic Society of Japan |
| Journal Title: | Journal of The Ceramic Society of Japan |
| Volume: | 122 |
| Issue: | 1424 |
| Start Page: | 288 |
| End Page: | 291 |
| Publisher DOI: | 10.2109/jcersj2.122.288 |
| Abstract: | Preparation and magnetic properties were investigated on the Co doped α"-Fe16N2 obtained in low temperature nitridation of bcc Fe1-xCox alloys to change its magnetic coercivity. The alloys were prepared by the reduction of (Fe1-xCox)(3)O-4 obtained by hydrolysis of iron and cobalt acetylacetonate mixture in benzyl alcohol. Fine powder of the pure spinel-type (Fe1-xCox)(3)O-4 was obtained in x = 0-0.05. The oxides were reduced to bcc Fe1-xCox alloy at 400 degrees C in H-2 gas and then nitrided at 150 C for 5 or 8 h under NH3 gas flow. XRD and X-ray absorption spectroscopy suggested the nominal α"-(Fe1-xCox)(16)N-2", similar to α"-Fe16N2" was obtained as a mixture with the residual bcc (Fe1-xCox) alloy at x = 0.03 as in the case of the nitrided product without cobalt. The present nitrided product exhibited a larger magnetization of 217Am(2) kg(-1) and a smaller magnetic coercivity of 30mT at x = 0.03 than those for the present products without the Co doping. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/57486 |
| 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: 鱒渕 友治
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