| Budget Amount *help |
¥26,780,000 (Direct Cost: ¥20,600,000、Indirect Cost: ¥6,180,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2012: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
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| Outline of Final Research Achievements |
Joint-region microstructural characterization revealed well-bonded interfaces with microstructures strongly dependent on the interlayer. It was found that the Ti interlayer exhibited more intensive interfacial reaction with ZrB2 composite than the Zr interlayer, which is mainly attributed to the formation of Ti-Zr-Si ternary liquid phase at the bonding temperature. Additionally, the bending strength at room temperature reached 477.7±88 MPa for the Ti interlayer and 439±70 MPa for the Zr interlayer, respectively. Then at high temperature (1000 °C, under air), the bending strength exhibited 495.3±45 MPa for the Ti interlayer and 190.7±84 MPa for the Zr interlayer, respectively. These results indicated that the strength of the joints were comparable at room temperature, however at elevated temperature, the joint with Zr interlayer revealed significantly reduced strength, which is due to the residual metallic Zr at the interface and its oxidization during the bending test at 1000 °C.
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