Development of Co-Al oxide dispersion strengthened (ODS) composite materials
Project/Area Number |
24360282
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Structural/Functional materials
|
Research Institution | Hokkaido University |
Principal Investigator |
Ukai Shigeharu 北海道大学, 工学(系)研究科(研究院), 教授 (00421529)
|
Co-Investigator(Kenkyū-buntansha) |
SASAKI Taisuke 国立研究開発法人物質・材料研究機構 (30615993)
OONO NAOKO 北海道大学, 大学院工学研究院, 助教 (40512489)
|
Project Period (FY) |
2012-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2012: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
|
Keywords | 耐熱材料 / コバルト合金 / ODS合金 / 酸化物粒子 / 高温強度 / 耐酸化性 / 加工・熱処理 / Co基合金 / 熱・エネルギー材料 |
Outline of Final Research Achievements |
As the new heat resistant materials, Co-Al based oxide dispersion strengthened (ODS) alloy was developed through alloy design in terms of thermodynamic analysis software, mechanical test and oxidation test at 1000 °C. Co-20Cr-10Al (wt%) has dual phases, consisting of the same volume fraction in hardened B2 phase and Co solid solution. Nano-oxide particles like Y2Hf2O7, Y2Hf7O17, Al2O3 are dispersed more densely inside Al-enriched B2 phase. High-temperature strength at 1000 °C could be affected by the grain boundary deformation due to fine grains less than 1 μm in size. Accelerated α-Al2O2 scale formation leads to excellent oxidation resistance under air condition at 1000 °C.
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Report
(5 results)
Research Products
(12 results)