| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 봄 (04/19 ~ 04/20, 울산 롯데호텔) |
| 권호 |
13권 1호, p.918 |
| 발표분야 |
재료 |
| 제목 |
Preparation of Ni-Al Alloys at Reduced Temperature for Fuel Cell Applications |
| 초록 |
Preparation of the Ni-Al alloy normally involves melting of nickel and aluminum at high temperature around 1400oC. Synthesis of Ni-Al alloy without melting of nickel and aluminum is more desirable to reduce the cost of alloy production. Previously, porous Ni-Al anodes have been prepared from mixtures of elemental powders at 1100-1200oC, but the temperature is still too high to reduce the cost of alloy preparation significantly. The purpose of this study is to investigate the Ni-Al alloy formation below the melting point of aluminum (660oC). To this end, aluminum chloride (AlCl3) is adopted as an activator for the formation of Ni-Al alloy powders. When mixtures of aluminum and nickel powders are exposed to AlCl3 vapor, aluminum in the mixtures can react with AlCl3 to produce AlCl and AlCl2, which react with nickel to form Ni-Al deposits on the nickel surface. In this study, we have prepared Ni-Al alloy powders from a mixture of Ni and Al elemental powders using AlCl3 as an activator. The effect of reaction temperatures on alloy formation has been thoroughly investigated. In addition, oxidation behavior of the Ni-Al alloy powders was examined. |
| 저자 |
함형철, 한종희, 윤성필, 남석우, 임태훈, 홍성안
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| 소속 |
한국과학기술(연) |
| 키워드 |
intermetallics; solid solution; high temperature alloys
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| E-Mail |
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| 원문파일 |
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