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

2010 ◽  
Vol 114 (41) ◽  
pp. 17788-17795 ◽  
Author(s):  
Chia-Lin Chang ◽  
Mark H. Engelhard ◽  
Shriram Ramanathan
Keyword(s):  
Room Temperature ◽  
Oxide Films ◽  
Surface Oxide ◽  
Mechanistic Studies ◽  
Ni Alloys

Spherulite Structures in a Melt Spun Fe-Ni Austenitic Steel

1985 ◽  
Vol 43 ◽  
pp. 52-53
Author(s):  
G. M. Michal ◽  
T. K. Glasgow ◽  
T. J. Moore
Keyword(s):  
Austenitic Steel ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Large Range ◽  
Amorphous Structure ◽  
Nucleation And Growth ◽  
Ni Alloys ◽  
Melt Spun ◽  
Crystal Fibers ◽  
Rapidly Solidified

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.

Valency Changes in the Surface Oxide Films on Metals

1963 ◽  
Vol 110 (6) ◽  
pp. 680 ◽  
Author(s):  
H. S. Isaacs ◽  
J. S. Llewelyn Leach
Keyword(s):  
Oxide Films ◽  
Surface Oxide

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

Langmuir ◽  
2006 ◽  
Vol 22 (24) ◽  
pp. 9829-9831 ◽  
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

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

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.

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

1995 ◽  
Vol 403 ◽  
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.

scholarly journals Room-temperature metastability of multilayer graphene oxide films

2012 ◽  
Vol 11 (6) ◽  
pp. 544-549 ◽  
Author(s):  
Suenne Kim ◽  
Si Zhou ◽  
Yike Hu ◽  
Muge Acik ◽  
Yves J. Chabal ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Room Temperature ◽  
Oxide Films ◽  
Multilayer Graphene

Sputtering Technique to Fabricate Smooth Surface Oxide Film for Room Temperature Bonding

2021 ◽  
Author(s):  
T. Saito ◽  
T. Hanasaki ◽  
T. Moriwaki ◽  
T. Goto ◽  
A. Takeda ◽  
...  
Keyword(s):  
Oxide Film ◽  
Smooth Surface ◽  
Room Temperature ◽  
Surface Oxide ◽  
Surface Oxide Film

Investigation of silicon oxide films prepared by room-temperature ion plating

1998 ◽  
Vol 83 (2) ◽  
pp. 1107-1113 ◽  
Author(s):  
Ching-Fa Yeh ◽  
Tai-Ju Chen ◽  
Ching-Lin Fan ◽  
Jiann-Shiun Kao
Keyword(s):  
Room Temperature ◽  
Silicon Oxide ◽  
Oxide Films ◽  
Ion Plating
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