| Project/Area Number |
15560596
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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 |
Composite materials/Physical properties
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| Research Institution | Shinshu University |
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Principal Investigator |
WATANABE Yoshimi Shinshu University, Faculty of Textile and Technology Dept.of Functional Machinary and Mechanics, Associate Professor, 繊維学部, 助教授 (50231014)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2004: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2003: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | Fiber Reinforced Composite / Intermetallic Compound / Fiber / Reaction / Functionally Graded Material / Nickel-aluminide / Hardness / Copper-Aluminum System / 界面 |
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| Research Abstract |
The reaction at narrow holes method (RANH method) has been proposed as a method for fabricating an intermetallic compound fiber/metal matrix composite. Narrow holes having a small diameter are drilled in a metal matrix A. Metal fibers B are inserted into these narrow holes. The assembly comprising the metal matrix A and metal fibers B is heated at elevated temperatures to obtain molten metal B in the narrow holes. Then, the reaction of mA+nB→AmBn should occur at least in the narrow holes. After the processing, the assembly is cooled to ambient temperature. Consequently, the intermetallic compound AmBn fiber/metal matrix A composite can be fabricated.
In this study, a nickel-aluminides fiber/nickel composite and a copper-aluminum system composite are fabricated by the novel method, RANH method. The results are summarized as follows.
Nickel-aluminides fiber/nickel composite
1)Reacted region is limited to the fiber shaped region, since the nickel-aluminide replaces the pure aluminum maintaining its fiber shape surrounded by the nickel matrix.
2)High hardness could be achieved for specimens beat-treated at 1000 ℃.
3)Specimens heat-treated at 1000 ℃ and 1200 ℃ have lots of pores.
Copper-aluminum system composite
1)Double annular regions are formed around the hole by heating at a temperature less than about 700 ℃. The inner annular region consists of γ1 intermetallic compound in a single phase having very high hardness. The outer annular region consists of Al-Cu solid-solution having a mid-level hardness. The annular regions may work as a reinforcing metal fiber in FRM.
2)When the annular region is formed with a constant width along the edge of the hole, the resultant specimen has the hole maintaining its circular section shape of the original narrow hole.
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