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Study on formation of functional Cr ceramics film by disproportionation reaction

Research Project

Project/Area Number 04650615
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 金属精錬・金属化学
Research InstitutionNagoya University

Principal Investigator

OKIDO Masazumi  Nagoya University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (50126843)

Co-Investigator(Kenkyū-buntansha) ICHINO Ryouichi  Nagoya University, Faculty of Engineering, Assistant Professor, 工学部, 助手 (70223104)
OKI Takeo  Nagoya University, Faculty of Engineering, Professor, 工学部, 教授 (30023039)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsChromium 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
Research Abstract

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.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 沖猛雄: "溶融塩不均化反応を用いたクロム窒化物/鉄-クロム固溶体複合皮膜の生成とその材料特性" 資源・素材学会誌. 108. 863-867 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takeo OKI: "Formation of Chromium Silicide Films on Steel by Disproportionation Reaction in Molten Salts" ISIJ International. 33. 1023-1028 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 沖猛雄: "高温金属化学的手法による表面改質-溶融塩不均化反応を中心として-" 日本金属学会誌. 32. 29-37 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 沖猛雄: "溶融塩不均化反応を用いたクロム窒化物/鉄-クロム固溶体複合皮膜の生成とその材料特性" 資源・素材学会誌. 108. 863-867 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Oki: "Formation of Chromium Silicide Films on Steel by Disproportionation Reaction in Molten Salts" ISIJ International. 33. 1023-1028 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 沖猛雄: "高温金属化学的手法による表面改質-溶融塩不均化反応を中心として-" 日本金属学会誌. 32. 29-37 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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