2011 Fiscal Year Final Research Report
Development of metallic glass composite with zero-thermal expansion using negative thermal expansion materials and the evaluation of machinability
| Project/Area Number |
22760523
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Composite materials/Physical properties
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Keywords | 複合効果 / 負膨張係数材料 / 金属ガラス / 膨張係数制御 |
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| Research Abstract |
Aim of this study is development amorphous alloy composite with zero thermal expansion coefficient by combining positive and negative thermal expansion materials. Metallic glass(amorphous) Fe_<43>Cr_<16>Mo_<16>C_<15>B_<10> and anti-perovskite nitride Mn_3(Cu_<0.53>Ge_<0.47>) N, which exhibits negative thermal expansion in a temperature range of 270 K-350K, were successfully sintered at 863K, which is equal to a glass transition temperature of Fe_<43>Cr_<16>Mo_<16>C_<15>B_<10> metallic glass, by spark plasma sintering(SPS) method. Viscous flow in a super-cooled state of Fe_<43>Cr_<16>Mo_<16>C_<15>B_<10> metallic glass enabled the sintering at such a low temperature, while amorphous structure of the Fe_<43>Cr_<16>Mo_<16>C_<15>B_<10> metallic glass was maintained during SPS process. The coefficient of thermal expansion of the composite exhibited almost zero in a range of 263 K-353K.
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Research Products
(7 results)
