| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
The microstructure of the harmonic-structured composite was composed by dispersive regions of pure Ti and the network region of Alumina particles dispersed Ti-Al alloys. Vickers hardness test at room temperature reveal that dispersive, network and overall regions of this material demonstrate 207, 845 and 234 HV, which was higher than the conventional Ti-Al alloy / pure Ti harmonic-structured composite, respectively. These improvements of hardness are due to effect of Alumina dispersed particle. Vickers hardness at 873 K and 1073 K corresponds to 102 and 81 HV, respectively. Observation of the Vickers indentation at room temperature and 873 K reveal that the network region prevents the deformation by the indenter and the dispersed region keeps the progress of crack stopping. These results suggest that Alumina dispersed Ti-Al / pure Ti harmonic structured composite is expected in use up to 873 K.
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