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Development of High Strength and High Corrosion Resistant Mo Composite Material under Severe Environment

Research Project

Project/Area Number 11555187
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section展開研究
Research Field Material processing/treatments
Research InstitutionOKAYAMA UNIVERSITY

Principal Investigator

YOSHIO Tetuo  OKAYAMA UNIVERSITY, Faculty of Environmental Science and Technology, Professor, 環境理工学部, 教授 (70032943)

Co-Investigator(Kenkyū-buntansha) TOMII Youich  Faculty of Energy Science, Graduate School, Kyoto University, Associate Professor, 大学院・エネルギー科学研究科, 助教授 (90026245)
TAKADA Jun  OKAYAMA UNIVERSITY, The Graduate School of Natural Science and Technology, Professor, 大学院・自然科学研究科, 教授 (60093259)
NAGAE Masahiro  OKAYAMA UNIVERSITY, Faculty of Environmental Science and Technology, Research Fellow of the Japan Society for the Promotion of Science, 環境理工学部, 日本学術振興会特別研究員 (60304341)
KATO Yasuhiro  Engineering Department, Sunric Co., Ltd, General Manager, 技術部・部長
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥13,700,000 (Direct Cost: ¥13,700,000)
Fiscal Year 2000: ¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 1999: ¥7,900,000 (Direct Cost: ¥7,900,000)
KeywordsInternal Nitriding / Molybdenum Alloy / Molybdenum Nitrides / Precipitation Strengthening / Corrosion Resistance / Boiling Sulfuric Acid / 析出強化
Research Abstract

For pure Mo and Mo-0.5 mass% alloy nitrided at 1073K to 1373K in NH_3 gas, the microstructural observations of molybdenum nitride layer were carried out through an optical and a transmission electron microscope and X-ray diffraction analysis. Corrosion behavior of the nitrided specimens was also examined. A surface nitriding layer consisted mainly of two Mo nitrides : an outer one of γ-Mo_2N and an inner one of β-Mo_2N.A great number of{011}<011>-type micro-twins were observed in the β-Mo_2N layer whereas the microstructure of the γ-Mo_2N layer is almost free from lattice defects. The nitrided specimens exhibited excellent corrosion resistance even in 75wt% sulfuric acid solution at the boiling temperature of 460.8K compared with unnitrided specimens. Its corrosion rate decreased with decreasing nitriding time because of the suppression of cracking by decreasing thickness of the surface nitriding layer. The corrosion rate of the specimen nitrided at 1123K for 24h was less than 0.001mm/y in boiling 75% sulfuric acid. In a nitrided Mo-0.5Ti alloy an internal nitriding layer with remarkably high hardness of Hv〜800 was formed beneath the surface nitriding layer. The high hardness is considered to be ascribed from fine dispersion of extremely small titanium nitride particles in the Mo matrix. The hardness in the internal nitriding layer gradually decreased as the distance from the interface increased.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (45 results)

All Other

All Publications (45 results)

  • [Publications] 玉井 博康: "予備酸化およびスパッタリング金属被覆した窒化アルミニウムセラミックスの耐水性"材料. 50(印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 玉井 博康: "メタライズ窒化アルミニウムの耐湿性に及ぼす被膜欠陥の極値統計解析による評価"材料. 50(印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Surface Modification of Molybdenum Alloys by Carburization"Proc.of Power Metallurgy World Congress & Exhibition 2000. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Microstructure of Molybdenum Nitride Layer Formed by Nitriding of Molybdenum Metal"Journal of the American Ceramic Society. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 青木 薫: "ゴミ焼却炉膜擬灰による炭化ケイ素の高温腐食"耐火物. 52. 520-523 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Tamai: "Hydrothermal Corrosion and Strength Degradation of Aluminum Nitride Ceramics"Journal of the American Ceramic Society. 83. 3216-3218 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Tamai: "Corrosion Behavior of the Electroless Plated Aluminum Nitride in Hydrothermal Environment"Ceramic Transactions. 103. 491-501 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 吉尾 哲夫: "材料の腐食科学のうねりとセラミックス"材料と環境. 49巻・12号. 717-718 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 青木 薫: "300℃の水蒸気中における炭化けい素焼結体の腐食挙動"材料と環境. 49巻・11号. 706-709 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Oda: "Oxidation of Hexagonal Boron Nitride Powder in N_2-O_2, Ar-O_2 and Ar-H_2O"Proc.of High-Temperature Corrosion and Protection 2000. 483-486 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 長江 正寛: "多段内部窒化処理による希薄Mo-Ti合金の再結晶制御"日本金属学会誌. 64巻・9号. 747-750 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 長江 正寛: "内部窒化により組織制御したMo合金の機械的性質"日本金属学会誌. 64巻・9号. 751-754 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Surface Modification of Molybdenum Alloys by Nitriding"Proc.of 1999 International Conference on Power Metallurgy & Particulate Materials. 11. 109-116 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Microstructure and Properties of Molybdenum Nitride Layer"Proc.of 9^<th> CIMTEC, Advances in Science and Technology. 13. 329-336 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Tamai: "Corrosion Resistance of Aluminum Nitride Ceramics Modified by Pre-Oxidation and Sputtering Metallization in Watre at 100℃"Zairyo. 50(in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Tamai: "Evaluation of Effect of Film Defects on Hydrothermal Corrosion Resistance of Metallized Aluminum Nitride Ceramics by Statistics of Extreme"Zairyo. 50(in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Surface Modification of Molybdenum Alloys by Carburization"Proc.of Powder Metallurgy World Congress & Exhibition 2000. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Microstructure of Molybdenum Nitride Layer Formed by Nitriding of Molybdenum Metal"J.Am.Ceram.Soc.. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Aoki: "High-Temperature Corrosion of Silicon Carbide in Simulated Incinerator Ash"Taikabutsu. 52[10]. 520-523 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Tamai: "Hydrothermal Corrosion and Strength Degradation of Aluminum Nitride Ceramics"J.Am.Ceram.Soc.. 83[12]. 3216-3218 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Tamai: "Corrosion Behavior of Electroless Plated Aluminum Nitride in Hydrothermal Environment"Ceramic Transactions. 103. 491-501 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Yoshio: "Ceramics and Wave of Corrosion Science of Materials"Zairyo-to-Kankyo. 49. 717-718 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Aoki: "Corrosion Behavior of Sintered Silicon Carbide in Water Vapor at 300℃"Zairyo-to-Kankyo. 49. 706-709 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Oda: "Oxidation of Hexagonal Boron Nitride Powder in N_2-O_2, Ar-O_2 and Ar-H_2O"Proc.of High-Temperature Corrosion and Protection 2000. 483-486 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Recrystallization Control of Dilute Molybdenum-Titanium Alloys by Multi-Step InternalNitriding"J.Japan Inst.Metals. 64[9]. 747-750 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Mechanical Properties of Molybdenum Alloys Micro-Structurally Controlled by Internal Nitriding"J.Japan Inst.Metals. 64[9]. 751-754 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Surface Modification of Molybdenum Alloys by Nitriding"Proc.of 1999 International Conference on Powder Metallurgy & Particulate Materials. 11. 109-116 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Nagae: "Microstructure and Properties of Molybdenum Nitride Layer"Proc.of 9^<th> CIMTEC, Advances in Science and Technology. 13. 329-336 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 長江正寛: "多段内部窒化処理による希薄Mo-Ti合金の再結晶制御"日本金属学会誌. 64卷・9号. 747-750 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 長江正寛: "内部窒化により組織制御したMo合金の機械的性質"日本金属学会誌. 64卷・9号. 751-754 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 青木薫: "ゴミ焼却炉模擬灰による炭化けい素の高温腐食"耐火物. 52卷・10号. 520-523 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Tamai: "Hydrothermal Corrosion and Strength Degradation of Aluminum Nitride Ceramics"Journal of the American Ceramic Society. 83. 3216-3218 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Tamai: "Corrosion Behavior of the Electroless Plated Aluminum Nitride in Hydrothermal Environment"Ceramic Transactions. 103. 491-501 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 吉尾哲夫: "材料の腐食科学のうねりとセラミックス"材料と環境. 49卷・12号. 717-718 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 青木薫: "300℃の水蒸気中における炭化けい素焼結体の腐食挙動"材料と環境. 49卷・11号. 706-709 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Nagae: "Microstructure of Molybdenum Nitride Layer Formed by Nitriding of Molybdenum Metal"Journal of the American Ceramic Society. (in press).

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Nagae: "Surface Modification of Molybdenum Alloys by Carburization"Proc.of Powder Metallurgy World Congress & Exhibition 2000. (in press).

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Kusano: "Phase Diagram of the BaO(BaCO_3)-CaO-CuO System"Journal of the American Ceramic Society. 82. 1329-1332 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 中西真: "固相法により作製したLi添加Bi-2212相への電気化学的手法によるLiのインターカレーション"粉体および粉末冶金. 46卷・9号. 990-993 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 中西真: "プレセラミックス法によるN-Znフェライト/SiC系複合焼結体の作製と電磁波吸収特性"粉体および粉末冶金. 47卷・8号. 927-930 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M. Nagae: "Surface Modification of Molybdenum Alloys by Nitriding"Proc. of 1999 International Conference on Powder Metallurgy & Particulate Materials. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] 吉尾 哲夫: "再結晶組織を制御した高強度・高靭性Mo-TiN系耐熱複合材料の創製"岡山大学大学院VBL研究年報. 第5集(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] H. Tamai: "Corrosion Behavior of the Electroless Plated Aluminum Nitride in Hydrothermal Environment"Proc. of the 101th Annual Meeting of The American Ceramic Societies. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] H. Tamai: "Corrosion Behavior of the Electroless Ni-P Metallized Aluminum Nitride in Hydrothermal Environment"Proc. of the 3^<rd> International meeting of Pacific Rim Ceramic Societies. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] 吉尾 哲夫: "セラミック工学ハンドブック(第2版)(分担執筆)基礎編第1編,3.表面・界面"3.4.4.反応""技報堂出版 (編集中).

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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