| Project/Area Number |
10555037
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
機械工作・生産工学
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| Research Institution | SHIZUOKA UNIVERSITY |
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Principal Investigator |
NAKAMURA Tamotsu Shizuoka Univ., Fac. of Engineering, Professor, 工学部, 教授 (70023322)
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| Co-Investigator(Kenkyū-buntansha) |
IMAIZUMI Haruki Shizuoka Univ., Faculty of Engineering, Associate Researcher, 工学部, 教務員 (80303535)
HAYAKAWA Kunio Shizuoka Univ., Faculty of Engineering, Associate Researcher, 工学部, 助手 (80283399)
TANAKA Shigekazu Shizuoka Univ., Faculty of Engineering, Associate Professor, 工学部, 助教授 (60197423)
YAMAGATA Hiroshi Yamaha Motor Co., Research Center, Head Engineer, 研究開発センター, 主任技師
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥12,900,000 (Direct Cost: ¥12,900,000)
Fiscal Year 1999: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1998: ¥10,200,000 (Direct Cost: ¥10,200,000)
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| Keywords | Composite powder metals / Sintering with chemical reaction / Spark plasma sintering / Functionally gradient material / Intermetallic compound / Mechanical alloying / Die tool / Hardness test |
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| Research Abstract |
Spark plasma sintering with chemical reaction between Copper and Al uminum powders or Ti tanium and Aluminum powders has been tried to develop for making die tool made of a functionally gradient material. As a result, the following conclusions were obtained.
1. The manufacturing processes of the functionally gradient material die tool: (a) Mechanical alloying of copper and aluminum powders or titanium and aluminum powders (b) Compaction of the mechanical alloyed powders with gradient mix ratio in a metal die ring (c) Spark plasma sintering with chemical reaction of compacted powder (d) Polishing of the sintered die
2. The sintered part for Cu-33at%Al obtained under the pressure p=30-70MPa and the temperature 800 ℃ had Vickers hardness HV=757, the compressive fracture stress σ=1.23 Gpa and the relative density σ=100%, and included some intermetallic compounds of CuィイD29ィエD2AlィイD24ィエD2 and CuAl.
3. The sintered part for Ti-50at%Al obtained under the pressure p=30-70MPa and the temperature 850 ℃ had Vickers hardness HV=600, the compressive fracture stress σ=2.5 Gpa and the relative density ρ=100%, and included some intermetallic compounds of TiAl and TiィイD23ィエD2Al.
4. The relative density and the Vickers hardness for Ti-Al powders were increasing with the compressive pressure until the temperature 850 ℃ and the values were saturated more than 900 ℃.
5. The higher cylindrical parts until h=20 mm of d=14 mm in diameter were sintered at the temperature 900 ℃ and the pressure p=30 Mpa after compaction under the pressure p=400 Mpa at the room temperature, and the relative density ρ =100 % and the Vickers hardness HV=400 were obtained.
6. The cylindrical parts with different heights were sintered in piles after compaction at the room temperature, and the sufficient denstiy ρ =100% was obtained but the Vickers hardness was insufficient.
7. The cylindrical tube part for making die tool could sintered successfully.
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