| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
The goal of this research is to obtain the knowledge of diffusivity and solubility of B in Fe for the establishment of an effective design of boron-doped low alloy steels. The concentration profiles by long range diffusion of boron in the diffusion couples were analyzed by rf-GDOES, by which the solubility was determined. The detection limit and the quantitative limit of boron in Fe by rf-GDOES were found to be 1.7 and 3.3 wt.ppm, respectively. The solubility of B in γ-Fe within the temperature range of 950-1050 C are found to be 20~40 wt.ppm. The diffusivity of B in γ-Fe was found to be so fast that its diffusion mechanism was indicated to be an interstitial diffusion.
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