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 |
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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 | |
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