Investigation on the segregation behavior of rare-earth ions at the silicon nitried-grain boundary phase interface
| Project/Area Number |
19560684
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Fukuoka Institute of Technology |
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Principal Investigator |
KITAYAMA Mikito Fukuoka Institute of Technology, 工学部, 教授 (10330945)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2009: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2008: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2007: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Keywords | 窒化ケイ素 / 粒界 / 界面 / 希土類イオン / 偏析 / セラミックス / 表面・界面物性 / 希土類元素 |
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| Research Abstract |
As the sintering additive, La and Lu oxides that have the largest and the smallest, respectively, ionic radii among the lanthanide were selected. Silicon nitride sintered bodies were fabricated using the composition of (1-x)La_2O_3+xLu_2O_3(x=0, 0.1, 0.2, 0.3, …, 1), and their activation energies of the…transformation were determined. It was found that the energy value of x=0.3 was close to the one of x=1, which strongly suggests that rare-earth elements with small ionic radii would bond more strongly at the silicon nitried grain boundary interface.
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Report
(4 results)
Research Products
(27 results)
