| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
Group 4 to 6 metals are known as a refractory metal. To directly coat their surfaces with their carbide and nitride layers, it is necessary to remove a thermodynamically stable oxide film on the surface before carbon and nitrogen are diffused into the metal. Therefore, surface modification for their metals is difficult. On the other hand, we have found a simplified technique for forming a titanium carbonitride layer on the surface of titanium, which belongs to group 4 in the periodic table. Specifically, a titanium plate is embedded in a mixture containing iron and graphite powders, and then heat-treated at a temperature of around 1273 K in a nitrogen flow. In the present study, this new surface modification technique was applied to the refractory metal like molybdenum and tantalum, and its effectiveness was investigated from a viewpoint of a practical technique.
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