Abstract
Ni-Al alloys have been fabricated from the physical mixture of nickel and aluminum powders at temperatures below the melting point of aluminum using AlCl 3 vapor as an activator. Pure Ni 3Al intermetallic compound has been synthesized from the Ni-Al powder mixtures containing 15 wt% aluminum at 600 °C. From the powder mixture containing 5 wt% aluminum, a compound consisting of Ni-Al solid solution and Ni 3Al was produced at 600 °C, but this compound was converted entirely to a Ni-Al solid solution after annealing at 700 °C. The particle size and morphology of the Ni-Al solid solution were not greatly different from original nickel powders. It was observed that oxidation resistance was significantly enhanced by alloying of nickel with aluminum. The Ni-Al alloys synthesized in this study can be used as anode materials for high-temperature fuel cells which need improved resistance toward creep, sintering and redox cycling.
| Original language | English |
|---|---|
| Pages (from-to) | 733-737 |
| Number of pages | 5 |
| Journal | Journal of Alloys and Compounds |
| Volume | 446-447 |
| DOIs | |
| Publication status | Published - 2007 Oct 31 |
| Externally published | Yes |
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Keywords
- Gas-solid reactions
- High temperature alloys
- Intermetallics
- Thermal analysis
- X-ray diffraction
ASJC Scopus subject areas
- Metals and Alloys
Cite this
Preparation of Ni-Al alloys at reduced temperature for fuel cell applications. / Ham, Hyung Chul; Maganyuk, Anatoly P.; Han, Jonghee; Yoon, Sung Pil; Nam, SukWoo; Lim, Tae Hoon; Hong, Seong Ahn.
In: Journal of Alloys and Compounds, Vol. 446-447, 31.10.2007, p. 733-737.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preparation of Ni-Al alloys at reduced temperature for fuel cell applications
AU - Ham, Hyung Chul
AU - Maganyuk, Anatoly P.
AU - Han, Jonghee
AU - Yoon, Sung Pil
AU - Nam, SukWoo
AU - Lim, Tae Hoon
AU - Hong, Seong Ahn
PY - 2007/10/31
Y1 - 2007/10/31
N2 - Ni-Al alloys have been fabricated from the physical mixture of nickel and aluminum powders at temperatures below the melting point of aluminum using AlCl 3 vapor as an activator. Pure Ni 3Al intermetallic compound has been synthesized from the Ni-Al powder mixtures containing 15 wt% aluminum at 600 °C. From the powder mixture containing 5 wt% aluminum, a compound consisting of Ni-Al solid solution and Ni 3Al was produced at 600 °C, but this compound was converted entirely to a Ni-Al solid solution after annealing at 700 °C. The particle size and morphology of the Ni-Al solid solution were not greatly different from original nickel powders. It was observed that oxidation resistance was significantly enhanced by alloying of nickel with aluminum. The Ni-Al alloys synthesized in this study can be used as anode materials for high-temperature fuel cells which need improved resistance toward creep, sintering and redox cycling.
AB - Ni-Al alloys have been fabricated from the physical mixture of nickel and aluminum powders at temperatures below the melting point of aluminum using AlCl 3 vapor as an activator. Pure Ni 3Al intermetallic compound has been synthesized from the Ni-Al powder mixtures containing 15 wt% aluminum at 600 °C. From the powder mixture containing 5 wt% aluminum, a compound consisting of Ni-Al solid solution and Ni 3Al was produced at 600 °C, but this compound was converted entirely to a Ni-Al solid solution after annealing at 700 °C. The particle size and morphology of the Ni-Al solid solution were not greatly different from original nickel powders. It was observed that oxidation resistance was significantly enhanced by alloying of nickel with aluminum. The Ni-Al alloys synthesized in this study can be used as anode materials for high-temperature fuel cells which need improved resistance toward creep, sintering and redox cycling.
KW - Gas-solid reactions
KW - High temperature alloys
KW - Intermetallics
KW - Thermal analysis
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=35148833669&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=35148833669&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2007.02.096
DO - 10.1016/j.jallcom.2007.02.096
M3 - Article
AN - SCOPUS:35148833669
VL - 446-447
SP - 733
EP - 737
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -