Development of the Ni-based metallic glassy alloys for PEFC separator

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

doi:10.4028/0-87849-462-6.1367

Development of the Ni-based metallic glassy alloys for PEFC separator

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We prepared the Ni8_0-xCr_xP₁₆B₄ (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 T_g and T_x increased with increasing Cr content. The Δ T_x 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 T_g, T_x and ΔT_x were not changed.lt indicates that the sample was not thermally affected by hot-pressing in this experimental condition.

Original language	English
Title of host publication	Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
Publisher	Trans Tech Publications Ltd
Pages	1367-1370
Number of pages	4
Edition	PART 2
ISBN (Print)	0878494626, 9780878494620
DOIs	https://doi.org/10.4028/0-87849-462-6.1367
Publication status	Published - 2007 Jan 1
Event	6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, Korea, Republic of Duration: 2007 Nov 5 → 2007 Nov 9

Publication series

Name	Materials Science Forum
Number	PART 2
Volume	561-565
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Other

Other	6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
Country	Korea, Republic of
City	Jeju
Period	07/11/5 → 07/11/9

Keywords

Fuel cell
Melt-spinning
Ni-based metallic glass
Separator
Structural material

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.4028/0-87849-462-6.1367

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Yokoyama, M., Yamaura, S. I., Kimura, H., & Inoue, A. (2007). Development of the Ni-based metallic glassy alloys for PEFC separator. In Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 (PART 2 ed., pp. 1367-1370). (Materials Science Forum; Vol. 561-565, No. PART 2). Trans Tech Publications Ltd. https://doi.org/10.4028/0-87849-462-6.1367

Development of the Ni-based metallic glassy alloys for PEFC separator. / Yokoyama, Masanori; Yamaura, Shin Ichi; Kimura, Hisamichi; Inoue, Akihisa.

Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6. PART 2. ed. Trans Tech Publications Ltd, 2007. p. 1367-1370 (Materials Science Forum; Vol. 561-565, No. PART 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Yokoyama, M, Yamaura, SI, Kimura, H & Inoue, A 2007, Development of the Ni-based metallic glassy alloys for PEFC separator. in Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6. PART 2 edn, Materials Science Forum, no. PART 2, vol. 561-565, Trans Tech Publications Ltd, pp. 1367-1370, 6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6, Jeju, Korea, Republic of, 07/11/5. https://doi.org/10.4028/0-87849-462-6.1367

Yokoyama M, Yamaura SI, Kimura H, Inoue A. Development of the Ni-based metallic glassy alloys for PEFC separator. In Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6. PART 2 ed. Trans Tech Publications Ltd. 2007. p. 1367-1370. (Materials Science Forum; PART 2). https://doi.org/10.4028/0-87849-462-6.1367

Yokoyama, Masanori ; Yamaura, Shin Ichi ; Kimura, Hisamichi ; Inoue, Akihisa. / Development of the Ni-based metallic glassy alloys for PEFC separator. Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6. PART 2. ed. Trans Tech Publications Ltd, 2007. pp. 1367-1370 (Materials Science Forum; PART 2).

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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.

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