| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Workability of Au-5Pt-8Nb alloy ingot was insufficient and they showed serious cracks after cold-rolling. However, Au-5Pt-8Nb alloy wire was successfully produced using swaging process. Since the magnetic susceptibility of wire was slightly increased from Au-5Pt-8Nb ingot due to potential impurity elements absorbed during swaging process, the alloy composition was modified to Au-5Pt-7Nb. The ultimate strength/elongation of the wire could be changed from 540 MPa/25% to 630 MPa/13% using heat treatment. A prototype aneurysm clip could be produced from annealed soft wire. After aging treatment, the prototype clip showed the closing force required. Magnetic resonance image of the clip indicated that significant artifact was occurred around coil section of the clip. This artifact suggested that improvement of coil design was required to produce an artifact free clip.
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