1996 Fiscal Year Annual Research Report

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

Research Project

Project/Area Number	06402051
Research Institution	TOHOKU UNIVERSITY
Principal Investigator	浅見勝彦東北大学, 金属材料研究所, 助教授 (20005929)
Co-Investigator(Kenkyū-buntansha)	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)
Keywords	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
Research Abstract	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。

Research Products

(31 results)

All Other

All Publications (31 results)

[Publications] E. Akiyama: "The Corrosion Behavior of Sputter-Deposited Amorphous Al-Cr-Mo Alloys in I M HCI" Corros. Sci.38・2. 279-292 (1996)
[Publications] 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)
[Publications] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited Mo-Ta Alloys in 12 M HCI Solution" Corros. Sci.38・3. 397-411 (1996)
[Publications] 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)
[Publications] K. Asami: "Surface Characterization of Sputter-Deposited Cu-Ta Alloys by Auger Electron Spectroscopy" Sci. Rep. RITU. A42・1. 225-229 (1996)
[Publications] H. Mitsui: "High Temperature Sulfidation and Oxidation Behavior of Sputter-Deposited Al-refractory Metal Alloys" Mater. Trans. JIM. 37・3. 379-382 (1996)
[Publications] H. -J. Lee: "The Corrosion Berrosion of Ni-Ta-5P Alloys in Concentrated Hydrochloric Acid" Mater. Trans JIM. 37・3. 383-388 (1996)
[Publications] S. Ono: "Structure of Anodic Films Formed on Magnesium" J. Electrochem. Soc.143・3. L62-L63 (1996)
[Publications] 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)
[Publications] 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)
[Publications] 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)
[Publications] 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)
[Publications] 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)
[Publications] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited MO-Ti Alloys in Concentrated Hydrochloric Acid" Corros. Sci. 38・10. 1649-1667 (1996)
[Publications] P. Y. Park: "The Corrosion Behavior of Sputter-Deposited Mo-Nb Alloys in 12 M HCI Solution" Corros. Sci. 38・10. 1713-1750 (1996)
[Publications] T. Hanawa: "Microdissoltion of Calcium Ions Calcium-Ion Implanted Titaninum" Corros. Sci.38・9. 1579-1594 (1996)
[Publications] 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)
[Publications] 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)
[Publications] 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)
[Publications] A. Kawashima: "Amorphous Alloy Electrodes for Fuel Cells" Sci. Rep. RITU. A42・1. 91-98 (1996)
[Publications] K. Hashimoto: "Recent Progress in Corrosion Resistant New Alloys Prepared by Sputter Deposition" Sci. Rep. RITU. A42・1. 99-105 (1996)
[Publications] S. Ono: "Structure of Anodic Films Formen on Megnesium" J. Electrochem. Soc.143・3. L62-L63 (1996)
[Publications] K. Asami: "Ambient Oxidation of Amorphous Zr_<40>Cu_<60> Alloy Studied by AES and XRD" ECASIA'95. 212-215 (1996)
[Publications] 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)
[Publications] S. Ono: "Characterization of Chemical Conversion Coating Films Grown on Magnesium" Proc. the 13th International Corrosion Congress. Papar 080.
[Publications] 1-6 (1996)
[Publications] K. Asami: "Surface Analytical Study of Atmospheric Corrosion of Stainless Steels" Proc. the 13th International Corrosion Congress. Papar 038. 1-8 (1996)
[Publications] 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)
[Publications] 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)
[Publications] 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)
[Publications] 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 Fiscal Year Annual Research Report

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

Principal Investigator

浅見 勝彦 東北大学, 金属材料研究所, 助教授 (20005929)

Research Products

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

[Publications] 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)

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

[Publications] 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)

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

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

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

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

[Publications] 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)

[Publications] 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)

[Publications] 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)

[Publications] 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)

[Publications] 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)

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

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

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

[Publications] 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)

[Publications] 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)

[Publications] 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)

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

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

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

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

[Publications] 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)

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

[Publications] 1-6 (1996)

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

[Publications] 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)

[Publications] 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)

[Publications] 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)

[Publications] 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)

浅見勝彦東北大学, 金属材料研究所, 助教授 (20005929)