TY - GEN
T1 - Development of the Ni-based metallic glassy alloys for PEFC separator
AU - Yokoyama, Masanori
AU - Yamaura, Shin Ichi
AU - Kimura, Hisamichi
AU - Inoue, Akihisa
PY - 2007/1/1
Y1 - 2007/1/1
N2 - We prepared the Ni80-xCrxP16B4 (x = 3, 6, 9, 12, 15, 18, 21, 24, 27 and 30 at.%) alloy ingots in an Ar flow atmosphere without evacuation and then produced the alloy ribbons by melt-spinning in evacuation and air. Their thermal stability and other charasteristics were studied and the alloy composition was optimized. A supercooled liquid state appeared at Cr content of more than 9 at.%, and their Tg and Tx increased with increasing Cr content. The Δ Tx increases up to about 45 K with increasing Cr content up to 15 at.%, and then saturates in more higher Cr content. Thus we select the Ni65Cr15P16B4 alloy as an optimized composition for PEFC separator. Moreover, the precise grooves were successfully formed under viscous flow process. The groove-formed sample possessed a single glassy phase, and the Tg, Tx and ΔTx were not changed.lt indicates that the sample was not thermally affected by hot-pressing in this experimental condition.
AB - We prepared the Ni80-xCrxP16B4 (x = 3, 6, 9, 12, 15, 18, 21, 24, 27 and 30 at.%) alloy ingots in an Ar flow atmosphere without evacuation and then produced the alloy ribbons by melt-spinning in evacuation and air. Their thermal stability and other charasteristics were studied and the alloy composition was optimized. A supercooled liquid state appeared at Cr content of more than 9 at.%, and their Tg and Tx increased with increasing Cr content. The Δ Tx increases up to about 45 K with increasing Cr content up to 15 at.%, and then saturates in more higher Cr content. Thus we select the Ni65Cr15P16B4 alloy as an optimized composition for PEFC separator. Moreover, the precise grooves were successfully formed under viscous flow process. The groove-formed sample possessed a single glassy phase, and the Tg, Tx and ΔTx were not changed.lt indicates that the sample was not thermally affected by hot-pressing in this experimental condition.
KW - Fuel cell
KW - Melt-spinning
KW - Ni-based metallic glass
KW - Separator
KW - Structural material
UR - http://www.scopus.com/inward/record.url?scp=38349135156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349135156&partnerID=8YFLogxK
U2 - 10.4028/0-87849-462-6.1367
DO - 10.4028/0-87849-462-6.1367
M3 - Conference contribution
AN - SCOPUS:38349135156
SN - 0878494626
SN - 9780878494620
T3 - Materials Science Forum
SP - 1367
EP - 1370
BT - Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
PB - Trans Tech Publications Ltd
T2 - 6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
Y2 - 5 November 2007 through 9 November 2007
ER -