1996 年度実績報告書

非平衡合金のの特性を利用した超微粒子金属分散金属酸化物材料創成に関する基礎的研究

研究課題

研究課題/領域番号	06402051
研究機関	東北大学
研究代表者	浅見勝彦東北大学, 金属材料研究所, 助教授 (20005929)
研究分担者	秋山英二東北大学, 金属材料研究所, 助手 (70231834) 菊地迪夫東北大学, 金属材料研究所, 助手 (30204837) 川嶋朝日東北大学, 金属材料研究所, 助教授 (50005964)
キーワード	非平衡合金 / 銅タンタル合金 / 銅ジルコニウム合金 / 大気酸化 / 担持触媒 / 一酸化窒素分解触媒 / コバルトジルコニウム合金 / 酸化ジルコニウム
研究概要	非平衡Cu-Zr合金、Cu-Ta合金およびNi-Zr合金の酸化挙動およびCo-Zr合金のNOの直接分解反応に対する触媒特性を詳細に調べた。 Cu-Zr合金表面の非常に薄い保護性初期酸化ZrO_2膜は湿潤大気中の水分と反応し保護性を失い、合金の酸化が進行し、金属銅とZrzO_2層とが交互に数層にわたるサンドイッチ状構造を生じる。生じたZrO_2には正方晶と単斜晶があり、前者は水分との反応で後者へと変態した。 Cu-Ta合金は高温湿潤大気中長時間暴露により、明青色、濃赤色等の組成に依存した色を呈した。変色した合金最表面はCuのみの層で、その下に含Ta酸化層等があり、変色は初期酸化被膜の保護性と強く関わっていた。約20μm厚の非晶質Ni-33Zr合金を高温大気中で酸化するとZrが優先酸化し、Niの酸化開始前に合金中のZrは完全に酸化された。非晶質Ni-65Zr合金の酸化は、表面被膜の割れにともなう二つの酸化段階を示した。生成したZrO_2は、高Ni合金では正方晶が、高Zr合金では単斜晶が主であった。非晶質Co-Zrz系合金は酸化後、NOの分解反応に対して触媒活性を示した。フッ化水素酸処理により試料表面に高濃度の白金族元素が濃縮し、微細な金属粒子が酸化物上に分散担持され、活性なNO分解媒特性を示した。本合金触媒によるNOの分解反応では、二次Co-Zr合金はNOの分解反応に対して触媒活性を示さず、少量の白金族元素の添加が必要であった。白金族元素の中ではpdが著しく高い触媒活性を示した。また、合金触媒は少量のpd添加でpd黒と同等の触媒活性を示し。非晶質Co-Zr-Pd合金を前駆体とした触媒はCo_3O_4、ZrO_2および金属Pdの協同効果によって高い触媒活性を示すことを明らかにした。

研究成果

(31件)

すべてその他

すべて文献書誌 (31件)

[文献書誌] E. Akiyama: "The Corrosion Behavior of Sputter-Deposited Amorphous Al-Cr-Mo Alloys in I M HCI" Corros. Sci.38・2. 279-292 (1996)
[文献書誌] M. -W. Tan: "The Influences of MO Addition and Air Exposure on the Corrosion Behavior of Amorphous Fe-8Cr-13P-7C Alloy in De-Aerated I M HCI" Corros. Sci. 38・2. 349-365 (1996)
[文献書誌] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited Mo-Ta Alloys in 12 M HCI Solution" Corros. Sci.38・3. 397-411 (1996)
[文献書誌] H. -J. Lee: "The Effect of Phosphorus Addition on the Corrosion Behavior of Arc-Melted Ni-10Ta-P Alloys" Corros. Sci.38・3. 469-458 (1996)
[文献書誌] K. Asami: "Surface Characterization of Sputter-Deposited Cu-Ta Alloys by Auger Electron Spectroscopy" Sci. Rep. RITU. A42・1. 225-229 (1996)
[文献書誌] H. Mitsui: "High Temperature Sulfidation and Oxidation Behavior of Sputter-Deposited Al-refractory Metal Alloys" Mater. Trans. JIM. 37・3. 379-382 (1996)
[文献書誌] H. -J. Lee: "The Corrosion Berrosion of Ni-Ta-5P Alloys in Concentrated Hydrochloric Acid" Mater. Trans JIM. 37・3. 383-388 (1996)
[文献書誌] S. Ono: "Structure of Anodic Films Formed on Magnesium" J. Electrochem. Soc.143・3. L62-L63 (1996)
[文献書誌] E. Akiyama: "A Study of the Structure of a Passive Film Using Angle-Resolve X-Ray Photoelectron Spectroscopy" Corrs. Sci. 38・7. 1127-1140 (1996)
[文献書誌] H. J. Lee: "The Corrosion Behavior of Amorpous and Crystalline Ni-10Ta-20P Alloys in 12 M HCI" Corros. Sci.38・8. 1269-1279 (1996)
[文献書誌] E. Akiyama: "The Effects of Alloying Elements on the Passivity of Sputter-Deposited Amorphous Al-Cr-Mo Alloys in 1 M HCI" Corros. Sci.38・8. 1281-1294 (1996)
[文献書誌] M. -W. Tan: "The Influences of Pre-Immersion on the Potentiostatic Polarization Behavior of Amorphous Fe-Cr-Mo-P-C Alloys in De-aerated l M HCl" Corros. Sci.38・9. 1495-1511 (1996)
[文献書誌] M. Komori: "Decomposition of Nitrogen Monoxide over NiTa_2O_6-Supported Palladium Catalysts Prepared from Amorphous Alloy Precursors" Applied Catalisis B. 9. 93-106 (1996)
[文献書誌] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited MO-Ti Alloys in Concentrated Hydrochloric Acid" Corros. Sci. 38・10. 1649-1667 (1996)
[文献書誌] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited Mo-Nb Alloys in 12 M HCI Solution" Corros. Sci. 38・10. 1713-1750 (1996)
[文献書誌] T. Hanawa: "Microdissoltion of Calcium Ions Calcium-Ion Implanted Titaninum" Corros. Sci.38・9. 1579-1594 (1996)
[文献書誌] H. Hanawa: "AES Studies on the Dissolution of Surface Oxide from Calcium-Ion-Implanted Titanium in Nitric Acid and Buffer Solutions" Corros. Sci. 38・11. 2061-2067 (1996)
[文献書誌] M. -W. Tan: "The Role of Chromium and Molybdenum in Passivation of Amorphous Fe-Cr-Mo-P-C Alloy in De-aerated l M HCl" Corros. Sci.38・12. 2137-2151 (1996)
[文献書誌] J. -F. Li: "X-Ray Photoelectron Spectroscopy Investigation on the Low-Temperature Degradation of 2 mol% Y_2O_3-ZrO_2 Ceramics" J. Am. Ceram. Soc.79・12. 3109-3112 (1996)
[文献書誌] A. Kawashima: "Amorphous Alloy Electrodes for Fuel Cells" Sci. Rep. RITU. A42・1. 91-98 (1996)
[文献書誌] K. Hashimoto: "Recent Progress in Corrosion Resistant New Alloys Prepared by Sputter Deposition" Sci. Rep. RITU. A42・1. 99-105 (1996)
[文献書誌] S. Ono: "Structure of Anodic Films Formen on Megnesium" J. Electrochem. Soc.143・3. L62-L63 (1996)
[文献書誌] K. Asami: "Ambient Oxidation of Amorphous Zr_<40>Cu_<60> Alloy Studied by AES and XRD" ECASIA'95. 212-215 (1996)
[文献書誌] K. Hashimoto: "Roles of Chromium, Molybdenum and Tungsten In Spontaneous Passivity of Sputter-Deposited Single Phase Alloys in Concentrated Hydrochloric Acids" Proc. the 13th International Corrosion Congress. papar 444. 1-9 (1996)
[文献書誌] S. Ono: "Characterization of Chemical Conversion Coating Films Grown on Magnesium" Proc. the 13th International Corrosion Congress. Papar 080.
[文献書誌] 1-6 (1996)
[文献書誌] K. Asami: "Surface Analytical Study of Atmospheric Corrosion of Stainless Steels" Proc. the 13th International Corrosion Congress. Papar 038. 1-8 (1996)
[文献書誌] K. Asami: "An Auger Electron Spectroscopic Study of the Corrosion Behavior of an Amorphous Zr_<40>Cu_<60> Alloy" Corros. Sci.39・1. 95-106 (1997)
[文献書誌] A. A. El-Moneim: "The Corrosion Behavior of Sputter-Deposited Amorphous Mn-Ti Alloys in 0.5 M NaCl Solutions" Corros. Sci. 39・2. 305-320 (1997)
[文献書誌] H. -J. Lee: "The Roles of Tantalum and Phosphorus in the Corrosion Behavior of Ni-Ta-P Alloys in 12 M HCl" Corros. Sci.39・2. 321-332 (1997)
[文献書誌] J. Bhattarai: "Electrochemical and XPS Studies of the Corrosion Behavior of Sputter-Deposited Amorphous W-Zr Alloys in 6 and 12 M HCl Solutions" Corros. Sci.39・2. 355-375 (1997)

1996 年度 実績報告書

非平衡合金のの特性を利用した超微粒子金属分散金属酸化物材料創成に関する基礎的研究

研究代表者

浅見 勝彦 東北大学, 金属材料研究所, 助教授 (20005929)

研究成果

[文献書誌] E. Akiyama: "The Corrosion Behavior of Sputter-Deposited Amorphous Al-Cr-Mo Alloys in I M HCI" Corros. Sci.38・2. 279-292 (1996)

[文献書誌] M. -W. Tan: "The Influences of MO Addition and Air Exposure on the Corrosion Behavior of Amorphous Fe-8Cr-13P-7C Alloy in De-Aerated I M HCI" Corros. Sci. 38・2. 349-365 (1996)

[文献書誌] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited Mo-Ta Alloys in 12 M HCI Solution" Corros. Sci.38・3. 397-411 (1996)

[文献書誌] H. -J. Lee: "The Effect of Phosphorus Addition on the Corrosion Behavior of Arc-Melted Ni-10Ta-P Alloys" Corros. Sci.38・3. 469-458 (1996)

[文献書誌] K. Asami: "Surface Characterization of Sputter-Deposited Cu-Ta Alloys by Auger Electron Spectroscopy" Sci. Rep. RITU. A42・1. 225-229 (1996)

[文献書誌] H. Mitsui: "High Temperature Sulfidation and Oxidation Behavior of Sputter-Deposited Al-refractory Metal Alloys" Mater. Trans. JIM. 37・3. 379-382 (1996)

[文献書誌] H. -J. Lee: "The Corrosion Berrosion of Ni-Ta-5P Alloys in Concentrated Hydrochloric Acid" Mater. Trans JIM. 37・3. 383-388 (1996)

[文献書誌] S. Ono: "Structure of Anodic Films Formed on Magnesium" J. Electrochem. Soc.143・3. L62-L63 (1996)

[文献書誌] E. Akiyama: "A Study of the Structure of a Passive Film Using Angle-Resolve X-Ray Photoelectron Spectroscopy" Corrs. Sci. 38・7. 1127-1140 (1996)

[文献書誌] H. J. Lee: "The Corrosion Behavior of Amorpous and Crystalline Ni-10Ta-20P Alloys in 12 M HCI" Corros. Sci.38・8. 1269-1279 (1996)

[文献書誌] E. Akiyama: "The Effects of Alloying Elements on the Passivity of Sputter-Deposited Amorphous Al-Cr-Mo Alloys in 1 M HCI" Corros. Sci.38・8. 1281-1294 (1996)

[文献書誌] M. -W. Tan: "The Influences of Pre-Immersion on the Potentiostatic Polarization Behavior of Amorphous Fe-Cr-Mo-P-C Alloys in De-aerated l M HCl" Corros. Sci.38・9. 1495-1511 (1996)

[文献書誌] M. Komori: "Decomposition of Nitrogen Monoxide over NiTa_2O_6-Supported Palladium Catalysts Prepared from Amorphous Alloy Precursors" Applied Catalisis B. 9. 93-106 (1996)

[文献書誌] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited MO-Ti Alloys in Concentrated Hydrochloric Acid" Corros. Sci. 38・10. 1649-1667 (1996)

[文献書誌] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited Mo-Nb Alloys in 12 M HCI Solution" Corros. Sci. 38・10. 1713-1750 (1996)

[文献書誌] T. Hanawa: "Microdissoltion of Calcium Ions Calcium-Ion Implanted Titaninum" Corros. Sci.38・9. 1579-1594 (1996)

[文献書誌] H. Hanawa: "AES Studies on the Dissolution of Surface Oxide from Calcium-Ion-Implanted Titanium in Nitric Acid and Buffer Solutions" Corros. Sci. 38・11. 2061-2067 (1996)

[文献書誌] M. -W. Tan: "The Role of Chromium and Molybdenum in Passivation of Amorphous Fe-Cr-Mo-P-C Alloy in De-aerated l M HCl" Corros. Sci.38・12. 2137-2151 (1996)

[文献書誌] J. -F. Li: "X-Ray Photoelectron Spectroscopy Investigation on the Low-Temperature Degradation of 2 mol% Y_2O_3-ZrO_2 Ceramics" J. Am. Ceram. Soc.79・12. 3109-3112 (1996)

[文献書誌] A. Kawashima: "Amorphous Alloy Electrodes for Fuel Cells" Sci. Rep. RITU. A42・1. 91-98 (1996)

[文献書誌] K. Hashimoto: "Recent Progress in Corrosion Resistant New Alloys Prepared by Sputter Deposition" Sci. Rep. RITU. A42・1. 99-105 (1996)

[文献書誌] S. Ono: "Structure of Anodic Films Formen on Megnesium" J. Electrochem. Soc.143・3. L62-L63 (1996)

[文献書誌] K. Asami: "Ambient Oxidation of Amorphous Zr_<40>Cu_<60> Alloy Studied by AES and XRD" ECASIA'95. 212-215 (1996)

[文献書誌] K. Hashimoto: "Roles of Chromium, Molybdenum and Tungsten In Spontaneous Passivity of Sputter-Deposited Single Phase Alloys in Concentrated Hydrochloric Acids" Proc. the 13th International Corrosion Congress. papar 444. 1-9 (1996)

[文献書誌] S. Ono: "Characterization of Chemical Conversion Coating Films Grown on Magnesium" Proc. the 13th International Corrosion Congress. Papar 080.

[文献書誌] 1-6 (1996)

[文献書誌] K. Asami: "Surface Analytical Study of Atmospheric Corrosion of Stainless Steels" Proc. the 13th International Corrosion Congress. Papar 038. 1-8 (1996)

[文献書誌] K. Asami: "An Auger Electron Spectroscopic Study of the Corrosion Behavior of an Amorphous Zr_<40>Cu_<60> Alloy" Corros. Sci.39・1. 95-106 (1997)

[文献書誌] A. A. El-Moneim: "The Corrosion Behavior of Sputter-Deposited Amorphous Mn-Ti Alloys in 0.5 M NaCl Solutions" Corros. Sci. 39・2. 305-320 (1997)

[文献書誌] H. -J. Lee: "The Roles of Tantalum and Phosphorus in the Corrosion Behavior of Ni-Ta-P Alloys in 12 M HCl" Corros. Sci.39・2. 321-332 (1997)

[文献書誌] J. Bhattarai: "Electrochemical and XPS Studies of the Corrosion Behavior of Sputter-Deposited Amorphous W-Zr Alloys in 6 and 12 M HCl Solutions" Corros. Sci.39・2. 355-375 (1997)

1996 年度実績報告書

浅見勝彦東北大学, 金属材料研究所, 助教授 (20005929)