Abstract
An in-situ sintered Ni-5 wt.% Al alloy anode for high-temperature fuel cells (HTFCs) was fabricated successfully using a green sheet consisting of a physical mixture of inexpensive Ni and Al elemental powders at reduced temperatures. Two processes-the formation of Ni-Al alloy via the AlCl3 activator under flowing hydrogen gas and the sintering of Ni-Al-occurred at the same time during pretreatment for cell operation. The AlCl3 activator reduced the synthesis reaction temperature and sintering temperature of Ni-Al alloy to nearly 600 °C. A twophase alloy of a Ni3Al intermetallic compound and a Ni-Al solid solution was obtained after sintering at 600 °C. The creep resistance of the in-situ sintered Ni-5 wt.% Al alloy was better than that of the conventional Ni-Al alloy green sheet, even though the sintering temperature of the Ni-5 wt.% Al alloy was 600 °C. This novel preparation method for Ni-Al alloys can greatly reduce the cost of anode fabrication for HTFCs and in turn accelerate the commercialization of HTFCs.
Original language | English |
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Pages (from-to) | 2131-2136 |
Number of pages | 6 |
Journal | Science of Advanced Materials |
Volume | 9 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2017 Dec 1 |
Keywords
- AlCl activator
- Creep
- High-temperature fuel cell
- Mechanical strength
- Nickel-Aluminum alloy
ASJC Scopus subject areas
- Materials Science(all)