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The Phase Equilibria and Seebeck Coefficient of (Co,M)3AlC (M=Fe or Ni)
| Title: | The Phase Equilibria and Seebeck Coefficient of (Co,M)3AlC (M=Fe or Ni) |
| Authors: | Maruoka, Tatsuya Browse this author | | Suzuki, Ryosuke O. Browse this author →KAKEN DB |
| Keywords: | Seebeck coefficient | | thermoelectric property | | phase equilibria | | carbide | | energy density of states |
| Issue Date: | 2006 |
| Publisher: | Thermoelectrics Society of Japan |
| Journal Title: | Materials Transactions |
| Volume: | 47 |
| Issue: | 6 |
| Start Page: | 1422 |
| End Page: | 1427 |
| Publisher DOI: | 10.2320/matertrans.47.1422 |
| Abstract: | The phase equilibria and the Seebeck coefficient were measured at the vicinity of the carbide (Co,M)3AlC (M = Fe or Ni) in the Co-Al-C, Co-Fe-Al-C and Co-Ni-Al-C systems. The samples were well annealed at 1473K and examined through X-ray diffraction measurements, energy dispersive X-ray analysis and carbon analysis. Co3AlC with a perovskite structure did not exist at its stoichiometric composition, but was located within a narrow compositional range near Co3AlC0.67. The maximum Seebeck coefficient was 23.3 μV/K at 873K for Co3AlC0.63. The replacement of a small amount of Co by Fe resulted in the expansion of the single-phase area of (Co,Fe)3AlCx, and the Seebeck coefficient of the single phase reached its maximum, 32.6 μV/K, at 873K and Co3.506Fe0.025AlC0.77 in the quaternary Co-Fe-Al-C system. The addition of Ni did not stabilize this carbide, and the maximum Seebeck coefficient in the quaternary Co-Ni-Al-C system was 26.9 μV/K at 873 K. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50113 |
| 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: 鈴木 亮輔
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