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

Hyung Chul Ham; Anatoly P. Maganyuk; Jonghee Han; Sung Pil Yoon; Suk Woo Nam; Tae Hoon Lim; Seong Ahn Hong

doi:10.1016/j.jallcom.2007.02.096

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

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

Research output: Contribution to journal › Article › peer-review

15 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 AlCl₃ vapor as an activator. Pure Ni₃Al 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 Ni₃Al 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	https://doi.org/10.1016/j.jallcom.2007.02.096
Publication status	Published - 2007 Oct 31

Keywords

Gas-solid reactions
High temperature alloys
Intermetallics
Thermal analysis
X-ray diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Preparation of Ni-Al alloys at reduced temperature for fuel cell applications",

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 AlCl3 vapor as an activator. Pure Ni3Al 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 Ni3Al 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.",

keywords = "Gas-solid reactions, High temperature alloys, Intermetallics, Thermal analysis, X-ray diffraction",

author = "Ham, {Hyung Chul} and Maganyuk, {Anatoly P.} and Jonghee Han and Yoon, {Sung Pil} and Nam, {Suk Woo} and Lim, {Tae Hoon} and Hong, {Seong Ahn}",

note = "Funding Information: This work was financially supported by Korea Institute of Science and Technology and Ministry of Commerce, Industry and Energy in Korea. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

month = oct,

day = "31",

doi = "10.1016/j.jallcom.2007.02.096",

language = "English",

volume = "446-447",

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AU - Ham, Hyung Chul

AU - Maganyuk, Anatoly P.

AU - Han, Jonghee

AU - Yoon, Sung Pil

AU - Nam, Suk Woo

AU - Lim, Tae Hoon

AU - Hong, Seong Ahn

N1 - Funding Information: This work was financially supported by Korea Institute of Science and Technology and Ministry of Commerce, Industry and Energy in Korea. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

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 AlCl3 vapor as an activator. Pure Ni3Al 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 Ni3Al 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 AlCl3 vapor as an activator. Pure Ni3Al 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 Ni3Al 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

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JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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