Hot-press workability of Ni-based glassy alloys in supercooled liquid state and production of the glassy alloy separators for proton exchange membrane fuel cell

Masanori Yokoyama; Shin Ichi Yamaura; Hisamichi Kimura; Akihisa Inoue

doi:10.2497/jjspm.54.773

Hot-press workability of Ni-based glassy alloys in supercooled liquid state and production of the glassy alloy separators for proton exchange membrane fuel cell

Masanori Yokoyama, Shin Ichi Yamaura, Hisamichi Kimura, Akihisa Inoue

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

3 Citations (Scopus)

Abstract

Optimum alloy compositions of the Ni-Nb-Cr-Mo-P-B, Ni-Cr-Nb-P-B and Ni-Cr-Mo-P-B glassy alloys were investigated for trail production of separator of fuel cell. Eventually the Ni₆₀Nb₂Cr₁₆Mo ₂P₁₆B₄, Ni₆₅Cr₁₀Nb ₅P₁₆B₄ and Ni₆₅Cr ₁₀Mo₅P₁₆B₄ glassy alloys were chosen from the viewpoint of having a wide supercooled liquid region. Then the groove formability of the compositionally optimized alloys in a supercooled liquid state was studied by hot-pressing with the dies having precise grooves. A precise groove forming can be achieved by hot-pressing the Ni ₆₀Nb₂Cr₁₆Mo₂P₁₆B ₄ and Ni₆₅Cr₁₀Mo₅P ₁₆B₄ glassy alloys in a supercooled liquid state at T _g+20 K. However, it was difficult to form the precise grooves in the Ni₆₅Cr₁₀Nb₅P₁₆B₄ glassy alloy. Finally, we successfully demonstrated that it is possible to form the grooves by hot-pressing using viscous flow deformation in a supercooled liquid state and to produce metallic glassy separators for proton exchange membrane fuel cells (PEMFC).

Original language	English
Pages (from-to)	773-777
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	54
Issue number	11
DOIs	https://doi.org/10.2497/jjspm.54.773
Publication status	Published - 2007 Nov

Keywords

Fuel cell
Hot-pressing
Metallic glass
Separator
Supercooled liquid

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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10.2497/jjspm.54.773

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Hot-press workability of Ni-based glassy alloys in supercooled liquid state and production of the glassy alloy separators for proton exchange membrane fuel cell. / Yokoyama, Masanori; Yamaura, Shin Ichi; Kimura, Hisamichi et al.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 54, No. 11, 11.2007, p. 773-777.

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

Yokoyama, M, Yamaura, SI, Kimura, H & Inoue, A 2007, 'Hot-press workability of Ni-based glassy alloys in supercooled liquid state and production of the glassy alloy separators for proton exchange membrane fuel cell', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 54, no. 11, pp. 773-777. https://doi.org/10.2497/jjspm.54.773

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abstract = "Optimum alloy compositions of the Ni-Nb-Cr-Mo-P-B, Ni-Cr-Nb-P-B and Ni-Cr-Mo-P-B glassy alloys were investigated for trail production of separator of fuel cell. Eventually the Ni60Nb2Cr16Mo 2P16B4, Ni65Cr10Nb 5P16B4 and Ni65Cr 10Mo5P16B4 glassy alloys were chosen from the viewpoint of having a wide supercooled liquid region. Then the groove formability of the compositionally optimized alloys in a supercooled liquid state was studied by hot-pressing with the dies having precise grooves. A precise groove forming can be achieved by hot-pressing the Ni 60Nb2Cr16Mo2P16B 4 and Ni65Cr10Mo5P 16B4 glassy alloys in a supercooled liquid state at T g+20 K. However, it was difficult to form the precise grooves in the Ni65Cr10Nb5P16B4 glassy alloy. Finally, we successfully demonstrated that it is possible to form the grooves by hot-pressing using viscous flow deformation in a supercooled liquid state and to produce metallic glassy separators for proton exchange membrane fuel cells (PEMFC).",

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AU - Inoue, Akihisa

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N2 - Optimum alloy compositions of the Ni-Nb-Cr-Mo-P-B, Ni-Cr-Nb-P-B and Ni-Cr-Mo-P-B glassy alloys were investigated for trail production of separator of fuel cell. Eventually the Ni60Nb2Cr16Mo 2P16B4, Ni65Cr10Nb 5P16B4 and Ni65Cr 10Mo5P16B4 glassy alloys were chosen from the viewpoint of having a wide supercooled liquid region. Then the groove formability of the compositionally optimized alloys in a supercooled liquid state was studied by hot-pressing with the dies having precise grooves. A precise groove forming can be achieved by hot-pressing the Ni 60Nb2Cr16Mo2P16B 4 and Ni65Cr10Mo5P 16B4 glassy alloys in a supercooled liquid state at T g+20 K. However, it was difficult to form the precise grooves in the Ni65Cr10Nb5P16B4 glassy alloy. Finally, we successfully demonstrated that it is possible to form the grooves by hot-pressing using viscous flow deformation in a supercooled liquid state and to produce metallic glassy separators for proton exchange membrane fuel cells (PEMFC).

AB - Optimum alloy compositions of the Ni-Nb-Cr-Mo-P-B, Ni-Cr-Nb-P-B and Ni-Cr-Mo-P-B glassy alloys were investigated for trail production of separator of fuel cell. Eventually the Ni60Nb2Cr16Mo 2P16B4, Ni65Cr10Nb 5P16B4 and Ni65Cr 10Mo5P16B4 glassy alloys were chosen from the viewpoint of having a wide supercooled liquid region. Then the groove formability of the compositionally optimized alloys in a supercooled liquid state was studied by hot-pressing with the dies having precise grooves. A precise groove forming can be achieved by hot-pressing the Ni 60Nb2Cr16Mo2P16B 4 and Ni65Cr10Mo5P 16B4 glassy alloys in a supercooled liquid state at T g+20 K. However, it was difficult to form the precise grooves in the Ni65Cr10Nb5P16B4 glassy alloy. Finally, we successfully demonstrated that it is possible to form the grooves by hot-pressing using viscous flow deformation in a supercooled liquid state and to produce metallic glassy separators for proton exchange membrane fuel cells (PEMFC).

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KW - Supercooled liquid

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Hot-press workability of Ni-based glassy alloys in supercooled liquid state and production of the glassy alloy separators for proton exchange membrane fuel cell

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Keywords

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