Mechanistic Studies on Room Temperature Photoexcitation Effects on Passivity Breakdown of Ultrathin Surface Oxide Films Formed on Ternary Al−5%Cu−5%Ni Alloys

Large additions of B to Fe-Ni alloys can lead to the formation of an amorphous structure, if the alloy is rapidly cooled from the liquid state to room temperature. Isothermal aging of such structures at elevated temperatures causes crystallization to occur. Commonly such crystallization pro ceeds by the nucleation and growth of spherulites which are spherical crystalline bodies of radiating crystal fibers. Spherulite features were found in the present study in a rapidly solidified alloy that was fully crysstalline as-cast. This alloy was part of a program to develop an austenitic steel for elevated temperature applications by strengthening it with TiB2. The alloy contained a relatively large percentage of B, not to induce an amorphous structure, but only as a consequence of trying to obtain a large volume fracture of TiB2 in the completely processed alloy. The observation of spherulitic features in this alloy is described herein. Utilization of the large range of useful magnifications obtainable in a modern TEM, when a suitably thinned foil is available, was a key element in this analysis.

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Valency Changes in the Surface Oxide Films on Metals

Journal of The Electrochemical Society ◽

10.1149/1.2425850 ◽

1963 ◽

Vol 110 (6) ◽

pp. 680 ◽

Cited By ~ 25

Author(s):

H. S. Isaacs ◽

J. S. Llewelyn Leach

Keyword(s):

Oxide Films ◽

Surface Oxide

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High-quality indium tin oxide films prepared at room temperature by oxygen ion beam assisted deposition

EPL (Europhysics Letters) ◽

10.1209/epl/i2002-00147-6 ◽

2002 ◽

Vol 59 (4) ◽

pp. 606-611 ◽

Cited By ~ 14

Author(s):

C Liu ◽

T Matsutani ◽

N Yamamoto ◽

M Kiuchi

Keyword(s):

Tin Oxide ◽

Indium Tin Oxide ◽

Room Temperature ◽

Ion Beam ◽

Oxide Films ◽

High Quality ◽

Oxygen Ion ◽

Ion Beam Assisted Deposition ◽

Tin Oxide Films

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Substrate-Induced Growth of Nanostructured Zinc Oxide Films at Room Temperature Using Concepts of Biomimetic Catalysis

Langmuir ◽

10.1021/la0626914 ◽

2006 ◽

Vol 22 (24) ◽

pp. 9829-9831 ◽

Cited By ~ 26

Author(s):

Birgit Schwenzer ◽

John R. Gomm ◽

Daniel E. Morse

Keyword(s):

Zinc Oxide ◽

Room Temperature ◽

Oxide Films ◽

Biomimetic Catalysis ◽

Zinc Oxide Films ◽

Nanostructured Zinc Oxide

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Investigation of surface oxide films on InP mesa sidewalls and flat surfaces reactive ion etched using CH/sub 4//H/sub 2/ chemistry

Proceedings of 8th International Conference on Indium Phosphide and Related Materials ◽

10.1109/iciprm.1996.492271 ◽

2002 ◽

Author(s):

B.-T. Lee ◽

D.-K. Kim ◽

J.-H. Ahn ◽

D.-G. Oh

Keyword(s):

Oxide Films ◽

Surface Oxide ◽

Flat Surfaces

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Study on Regeneration Ability of Oxidation Film on Ignition-Proof Magnesium Alloy Added with RE

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.1665 ◽

2011 ◽

Vol 284-286 ◽

pp. 1665-1670

Author(s):

Zheng Hua Deng ◽

Hua Ji Li ◽

Wei Bin Li

Keyword(s):

Magnesium Alloy ◽

Oxide Film ◽

Room Temperature ◽

Surface Film ◽

Surface Oxidation ◽

Surface Oxide ◽

Regeneration Ability ◽

Surface Oxide Film ◽

Oxidation Performance

The ZM5-0.1%RE magnesium alloy was heated to 800°C, when the surface oxide film was formed, the ZM5-0.1% RE Magnesium alloy which had being oxidized obtained by removing the surface oxidation film on the ZM5-0.1%RE magnesium alloy at room temperature. TGA curve, oxidaxion kinetics curves at constant temperatuers of the alloy and XRD spectrum of the surface film were analyzed in order to investigate the sureface oxidation behavior.The results show that the alloy still has anti-oxidation performance, And the oxide inerease occurred mostly between 400°C and 700°C，a layer of tight oxide film with 4-5.5um and composed of RE2O3, MgO, Al2O3and Mg17Al12was formed on the surface of magnesiurn alloy. The tight surface oxide film prevented the further oxidation of the base magnesiurn alloy, It show that the regeneration ability of oxidation film on ZM5-0.1%RE Magnesium Alloy was good.

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Magnetic Properties of Sputtered Fe-O and Co-O Thin Films

MRS Proceedings ◽

10.1557/proc-403-701 ◽

1995 ◽

Vol 403 ◽

Cited By ~ 1

Author(s):

D. V. Dimitrov ◽

A. S. Murthy ◽

G. C. Hadjipanayis ◽

C. P. SWANN

Keyword(s):

Grain Size ◽

Low Temperatures ◽

Room Temperature ◽

Oxide Films ◽

X Ray Diffraction ◽

Dc Magnetron Sputtering ◽

Large Shift ◽

X Ray ◽

Grain Size And Shape ◽

Spherical Grains

AbstractFe-O and Co-O films were prepared by DC magnetron sputtering in a mixture of Ar and O2 gases. By varying the oxygen to argon ratio, oxide films with stoichiometry FeO, Fe3O4, α-Fe2O3, CoO and Co3O4 were produced. TEM studies showed that the Fe – oxide films were polycrystalline consisting of small almost spherical grains, about 10 nm in size. Co-O films had different microstructure with grain size and shape dependent on the amount of oxygen. X-ray diffraction studies showed that the grains in Fe-O films were randomly oriented in contrast to Co-O films in which a <111> texture was observed. Pure FeO and α-Fe2O3 films were found to be superparamagnetic at room temperature but strongly ferromagnetic at low temperatures in contrast to the antiferromagnetic nature of bulk samples. A very large shift in the hysteresis loop, about 3800 Oe, was observed in field cooled Co-CoO films indicating the presence of a large unidirectional exchange anisotropy.

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