| Project/Area Number |
11650712
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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 |
Structural/Functional materials
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
AOKI Kiyoshi Kitami Institute of Technology, Department of Engineering, Associate Professor, 工学部, 教授 (70124542)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAWA K. Kitami Institute of Technology, Department of Engineering, Research Associate, 工学部, 助手 (10312448)
SUZUKI K. Kitami Institute of Technology, Department of Engineering, Associate Professor, 工学部, 助教授 (20312449)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | Intermetallic Compounds / Amorphous / Mechanical Alloying / Cyclic Transformation / Metastable Phase / Solid State Reaction / Lattice Defects / Magnetic Property / ミリング / チタン合金 / 結晶化 / アモルファス化 / 熱分析 / ボールミリング / 非平衡相 / 粉末 / 結晶化温度 / 磁性 / サイクル / 相変態 / MA / 構造 |
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| Research Abstract |
Cyclic crystalline-amorphous-crystalline phase transformations have been investigated during high-energy ball milling of a mixture of elemental Co_<75>Ti_<25> powder under an argon gas atmosphere. The results have shown that the single amoiphous phase, which is obtained after 11 ks of mechanical alloying time, transforms into a new metastable phase of nanocrystalline bcc-Co_3Ti upon milling for 86 ks. However, it transforms to the same amorphous phase upon further milling (360 ks). The present work shows the effects of the milling time and the milling speed on the structure of the mechanically alloyed powders.
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