| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
For C/C composites/Ni-based refractory metal high quality joining, Ni-based alloy was made. 58Ni-20Cr-22Si alloy and 57Ni-20Cr-22Si alloy had good wettability on both C/C composites and Inconel-600 Ni-base alloy. These Ni-base alloy had the liquidus temperature lower than 1200ºC and can be used for high temperature brazing. The shear strength of C/C composites/Inconel-600 brazed joint with these metals was 2MPa. Crack was observed in C/C composites near joint interface. Enhancement of joint strength is considered to be due to the residual stress by CTE value difference between C/C composites and Inconel-600. By inserting Nb foil in the mating surfaces, the joint strength was improved. The interfacial bonding is, however, sound between both C/C composites and these alloys and Inconel-600 and these alloys, and with these alloys, high quality bonding is considered to be able to achieve.
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