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Electrochemical behavior of tungsten carbide-cobalt alloy using molten hydroxide as electrolyte under low temperature
http://hdl.handle.net/2237/00032334
http://hdl.handle.net/2237/000323344ad87f3a-7c2d-4c74-b808-20819eac476b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
draft_lowtemp (1.1 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-06-10 | |||||
| タイトル | ||||||
| タイトル | Electrochemical behavior of tungsten carbide-cobalt alloy using molten hydroxide as electrolyte under low temperature | |||||
| 言語 | en | |||||
| 著者 |
Kamimoto, Yuki
× Kamimoto, Yuki× Kasuga, Ren× Takeshita, Kyohei× Hagio, Takeshi× Kuroda, Kensuke× Ichino, Ryoichi× Deevanhxay, Phengxay |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | “This is a post-peer-review, pre-copyedit version of an article published in [Journal of Material Cycles and Waste Management]. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10163-019-00962-x”. | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Tungsten | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Cobalt | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Tungsten carbide-cobalt alloy | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Molten salt electrolysis | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Recycle | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Tungsten carbide-cobalt alloys (WC–Cos), which are used for cutting tools, are mainly composed of tungsten carbide and cobalt with minor elements including chromium, tantalum, nickel. Recycling WC–Cos requires a large amount of energy and chemicals for leaching tungsten. We previously showed that tungsten in WC–COs can be leached by potentiostatic electrolysis at − 0.7 V in molten sodium hydroxide (NaOH) at 723 K; tungsten constituted 99.7 mass% of the leached component in the molten salt. In this study, we investigated tungsten leaching at a lower temperature by using a eutectic mixture of 51.5 mol% NaOH and 49.5 mol% potassium hydroxide (KOH) as the electrolyte. Tungsten was leached from the alloy at temperatures above 623 K, which was 100 K lower than the previous study. Cobalt dissolved in the molten salt, although it formed a passive layer. Chromium underwent oxidization and dissolved as a hexavalent ion below 623 K. Tantalum dissolved even without electrolysis. Tungsten was leached at 623 K in this system. Highly purifying tungsten could be obtained by dissolving the cooled molten salt in water and bringing it in contact with air to precipitate other metal ions. Therefore, the electrochemical process is expected to be used for separating tungsten from WC–Cos. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | ファイル公開：2021/03/01 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Springer | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1007/s10163-019-00962-x | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1438-4957 | |||||
| 書誌情報 |
en : Journal of Material Cycles and Waste Management 巻 22, 号 2, p. 348-353, 発行日 2020-03 |
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| 著者版フラグ | ||||||
| 値 | author | |||||
