| Budget Amount *help |
¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000)
Fiscal Year 2009: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2008: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2007: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Research Abstract |
Miscibility gap in liquid phase in the Ag-Cu-X (X=Ni, Co, Fe) ternary systems was predicted and composition of the ternary alloys was optimized by thermodynamic calculation. Ingots were prepared by induction melting and powdered by gas-atomizing method. Consequently, each spherical particle of the powders exhibits egg-type microstructure, whose periphery and core consist of high-conductive Ag-rich phase and Cu-X phase, respectively. Obtained powders were sintered at 700～900℃ to form massive samples and their resistivity was measured to evaluate their potential for the high-conductive material. Resistivity of some sintered Ag-Cu-X alloys stacks up with a sintered pure Ag sample. It was found that Ag-rich phase decomposed from Cu-X core of particles as well as Ag-rich periphery forms dense and continuous network of the Ag-rich matrix, which results in the decrease of resistivity of sintered materials.
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