Study on formation of functional Cr ceramics film by disproportionation reaction

歧化反应形成功能性Cr陶瓷膜的研究

• 批准号: 04650615
• 负责人: OKIDO Masazumi
• 金额: $ 1.15万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650615/
• 关键词: Chromium nitride; Surface modification; Molten salts chemistry; Ceramics film; Surface hardening; Disproportionation reaction; クロム化合物皮膜; セラミックスコーティング; 耐摩耕性材料; 窒化物皮膜

Chromium nitride ceramics film was formed on the nitrided steels by immersing in chloride molten salts with chromium fluoride and ferro-chromium. Film formation reaction is based on the disproportionation reaction of chromium ions inmolten salts. The film consisited of chromium nitride, CrN and Cr_2N, and Fe-Cr solid solution, of which thickness depended on the treatment temperature, time and bath composition. The film showed high hardness from 1300 Hv to 3000 Hv. It has a good corrosion resistance in aqueous chloride solution in ambient temperature due to the surface diffusion anti-corrosive layr of chromium. Moreober, complex Cr-Si film, CrSi_2, could be formed on the steel by two step techniques. Therefore, It can be possible to make ceramics films on the specimen, which has no element for films, by using a multistep treatment in the molten salt.

采用氯化物熔盐浸渍法在氮化钢表面制备氮化铬陶瓷膜。成膜反应是基于铬离子在熔盐中的还原反应。膜层由氮化铬、CrN和Cr_2N以及Fe-Cr固溶体组成，膜层厚度与处理温度、时间和镀液成分有关。薄膜的硬度在1300 ~ 3000 Hv之间。由于铬的表面扩散防腐层，使其在常温氯化物水溶液中具有良好的耐蚀性。采用两步法可在钢表面形成CrSi_2复合膜。因此，可以在不含成膜元素的试样上，采用熔盐分步处理的方法制备陶瓷膜。

项目成果

T.OKI and R.Ichino: "Formation and Properties of Chromium Nitride/Iron-chromium Solid Solution Composite Films by Disproportionation Reaction in Molten Salts" J.Mining and Materials Processing Institute of Japan. 108-12. 863-867 (1992)

T.OKI 和 R.Ichino：“通过熔盐中的歧化反应形成氮化铬/铁铬固溶体复合膜”，J.日本矿业与材料加工研究所。

T.Oki: "Formation of Chromium Silicide Films on Steel by Disproportionation Reaction in Molten Salts" ISIJ International. 33. 1023-1028 (1993)

T.Oki：“通过熔盐中的歧化反应在钢上形成硅化铬薄膜”ISI​​J International。

T.OKI: "Surface Modification by means of Metal-Chemical Reaction at High Temperature-Mainly method by Metal Disproportionation Reaction in Molten Salts-" Japan Institute of Metals. 32-1. 29-37 (1993)

T.OKI：“高温下金属化学反应的表面改性-主要是通过熔盐中的金属歧化反应的方法-”日本金属研究所。

T.OKI, M.Okido, R.Ichino and N.Ishiguro: "Formation of Chromium Silicide Films on Steel by Disproportionation Reaction in Molten Salts" ISIJ International. 33-9. 1023-1028 (1993)

T.OKI、M.Okido、R.Ichino 和 N.Ishiguro：“通过熔盐中的歧化反应在钢上形成硅化铬薄膜”ISI​​J International。

Takeo OKI: "Formation of Chromium Silicide Films on Steel by Disproportionation Reaction in Molten Salts" ISIJ International. 33. 1023-1028 (1993)

Takeo OKI：“通过熔盐中的歧化反应在钢上形成硅化铬薄膜”ISI​​J International。