JP5973790B2 - 耐食性、導電性、成形性に優れた薄板およびその製造方法 - Google Patents
耐食性、導電性、成形性に優れた薄板およびその製造方法 Download PDFInfo
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- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
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- H01M2250/30—Fuel cells in portable systems, e.g. mobile phone, laptop
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Description
通常は、非晶質になる組成の金属が凝固するときに、今回混入する導電性粉末のような結晶化の核となるようなものがあると、非晶質ではなく結晶化して凝固し易くなるが、図1、図2にあるような超急冷遷移制御噴射装置を使用することにより、それを防ぐことが可能となる。これは、飛行時に、非晶質になる組成の金属粉末と、導電性粉末が混合状態ではなく、独立して飛行・凝固(非晶質になる組成の金属粉末)するためである。つまり、非晶質になりやすい組成の金属粉末と導電性粉末を混合させた粉末材料で、図1または図2にあるような超急冷遷移制御噴射装置を用いることにより、非晶質(を含む)金属母相に導電性物質が混在している薄板を作製することができる。
本発明で検討する金属材料は、不動態を形成して耐食性を発揮するものなので、何ら処置をしなければ接触抵抗が大きいと考えられる。従って、接触抵抗を低下するために、不動態内を通電する導電性の材料粉末の混入が必須である。
本発明の薄板は、母相の部分において耐食性が高く、かつ、導電性材料を有するために導電性に優れる。また、成形性および製造コストの点でも有利であるため、PEFC用の金属製セパレータとするのに極めて好適である。
噴射ガン(超急冷遷移制御噴射装置)で使用する金属材料は、Ni65Cr15P16B4(at%)の組成で、直径が+38/-63μmに分級されたガスアトマイズ粉末を用いた。これは、急冷すると金属ガラスとして凝固する組成であり、本発明でも過冷却液体域で成形加工することを狙ってこの組成を選定した。
作製した薄板より、□35mmサイズへの切り出しをマイクロカッタにて行い、非晶質薄板の反コイル側(噴射したままの状態であるため、Ra10μm程度の表面粗さ)をルータにて、平滑な表面にした。
Rs = Ra − Rc
作製したNo2の薄板(C混合)より、□20mmサイズへの切り出しをマイクロカッタにて行い、そのままの状態で供試した。浸漬する薬液には、ph=3の硫酸(80℃)を用意して、24時間の浸漬を行った。浸漬前後の試験片重量を測定し、重量変化と比重より腐食速度(μm/year)を算出した。
結果は、3μm/yearでPEFC用のセパレータとしては、十分な耐食性を確認できた。
2 ミスト噴出ノズル
3 ミスト噴出口
4 不活性ガス噴出口
5 火炎噴出口
6 粉末噴出口
7 ペイオフリール
8 予熱器
9 レベラ
10 薄板基材加熱、均熱装置
11 超急冷遷移制御噴射装置
12 圧延機
13 コイル巻取機
14 剥離させた薄板
Claims (6)
- 不動態を形成して耐食性を発揮する金属母相の中に、導電性材料成分が固溶することなく存在している薄板(ただし、プレス成形を施されているものを除く)であって、
上記の金属母相が非晶質を含むことを特徴とする薄板。 - 不動態を形成して耐食性を発揮する金属母相の中に、導電性材料成分が固溶することなく存在している薄板(ただし、プレス成形を施されているものを除く)であって、
上記の金属母相が非晶質を含み、
前記薄板は、基材上に積層された皮膜であることを特徴とする薄板。 - 上記導電性材料成分がCまたはB4Cであることを特徴とする請求項1または2に記載の薄板。
- 請求項1〜3のいずれかに記載の薄板を製造する方法であって、
上記の金属母相とするための金属と上記の導電性材料とを、基材に向けて噴射ガンより火炎とともに噴射して溶融させ、火炎が母材に達する前から冷却ガスにて冷却することにより、基材上に皮膜を積層させた複合板を得ることを特徴とする薄板の製造方法。 - 上記の複合板より皮膜を剥離して薄板として得ることを特徴とする請求項4に記載した薄板の製造方法。
- 金属母相とするための上記の金属として急冷により非晶質となる組成のものを使用し、上記皮膜および薄板における金属母相を非晶質を含むものにすることを特徴とする請求項4または5に記載した薄板の製造方法。
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
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JP2012121286A JP5973790B2 (ja) | 2012-05-28 | 2012-05-28 | 耐食性、導電性、成形性に優れた薄板およびその製造方法 |
EP13796440.9A EP2858153B1 (en) | 2012-05-28 | 2013-05-28 | Method for manufacturing a thin plate having excellent corrosion resistance, electroconductivity, and moldability, and use of the resulting plate |
US14/404,509 US10032537B2 (en) | 2012-05-28 | 2013-05-28 | Separator material for polymer electrolyte fuel cell having excellent corrosion resistance, conductivity and formability, and method for manufacturing same |
CN201380028452.4A CN104350637B (zh) | 2012-05-28 | 2013-05-28 | 耐蚀性、导电性、成型性优异的薄板及其制造方法 |
EP13796865.7A EP2858154B1 (en) | 2012-05-28 | 2013-05-28 | Separator material for solid polymer fuel cells having excellent corrosion resistance, conductivity and formability, and method for manufacturing same |
CN201380028380.3A CN104521048B (zh) | 2012-05-28 | 2013-05-28 | 耐蚀性、导电性、成型性优异的固体高分子型燃料电池用分离器材料及其制造方法 |
KR1020147035562A KR102089022B1 (ko) | 2012-05-28 | 2013-05-28 | 내식성, 도전성, 성형성이 뛰어난 박판 및 그 제조 방법 |
PCT/JP2013/064701 WO2013180094A1 (ja) | 2012-05-28 | 2013-05-28 | 耐食性、導電性、成形性に優れた固体高分子型燃料電池用セパレータ材料およびその製造方法 |
US14/404,495 US9959950B2 (en) | 2012-05-28 | 2013-05-28 | Thin plate having excellent corrosion resistance, conductivity and formability, and method for manufacturing same |
PCT/JP2013/064700 WO2013180093A1 (ja) | 2012-05-28 | 2013-05-28 | 耐食性、導電性、成形性に優れた薄板およびその製造方法 |
KR1020147035563A KR102089021B1 (ko) | 2012-05-28 | 2013-05-28 | 내식성, 도전성, 성형성이 뛰어난 고체 고분자형 연료 전지용 세퍼레이터 재료 및 그 제조 방법 |
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JP2012121286A JP5973790B2 (ja) | 2012-05-28 | 2012-05-28 | 耐食性、導電性、成形性に優れた薄板およびその製造方法 |
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JP2013108995A Division JP5980167B2 (ja) | 2013-05-23 | 2013-05-23 | 耐食性、導電性、成形性に優れた固体高分子型燃料電池用セパレータ材料およびその製造方法 |
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JP2013247036A JP2013247036A (ja) | 2013-12-09 |
JP2013247036A5 JP2013247036A5 (ja) | 2015-05-21 |
JP5973790B2 true JP5973790B2 (ja) | 2016-08-23 |
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US (2) | US10032537B2 (ja) |
EP (2) | EP2858153B1 (ja) |
JP (1) | JP5973790B2 (ja) |
KR (2) | KR102089022B1 (ja) |
CN (2) | CN104521048B (ja) |
WO (2) | WO2013180093A1 (ja) |
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JP6367567B2 (ja) * | 2014-01-31 | 2018-08-01 | 吉川工業株式会社 | 耐食性溶射皮膜、その形成方法およびその形成用溶射装置 |
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