Preparation of Ni-Al alloys at reduced temperature for fuel cell applications

Hyung Chul Ham, Anatoly P. Maganyuk, Jonghee Han, Sung Pil Yoon, SukWoo Nam, Tae Hoon Lim, Seong Ahn Hong

Research output: Contribution to journalArticle

11 Citations (Scopus)

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 languageEnglish
Pages (from-to)733-737
Number of pages5
JournalJournal of Alloys and Compounds
Volume446-447
DOIs
Publication statusPublished - 2007 Oct 31
Externally publishedYes

Fingerprint

Aluminum
Fuel cells
Powders
Nickel
Solid solutions
Temperature
Creep resistance
Oxidation resistance
Alloying
Intermetallics
Melting point
Anodes
Sintering
Particle size
Vapors
Annealing

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 journalArticle

Ham, Hyung Chul ; Maganyuk, Anatoly P. ; Han, Jonghee ; Yoon, Sung Pil ; Nam, SukWoo ; Lim, Tae Hoon ; Hong, Seong Ahn. / Preparation of Ni-Al alloys at reduced temperature for fuel cell applications. In: Journal of Alloys and Compounds. 2007 ; Vol. 446-447. pp. 733-737.
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