Room temperature oxidation kinetics of Si nanoparticles in air, determined by x-ray photoelectron spectroscopy

2005 ◽  
Vol 97 (2) ◽  
pp. 024303 ◽  
Author(s):  
D.-Q. Yang ◽  
Jean-Numa Gillet ◽  
M. Meunier ◽  
E. Sacher
Keyword(s):  
Photoelectron Spectroscopy ◽  
Oxidation Kinetics ◽  
Room Temperature ◽  
Temperature Oxidation ◽  
X Ray ◽  
Si Nanoparticles ◽  
Kinetics Of

scholarly journals Influence of high heating rates on evolution of oxides on directed laser energy additively fabricated IN718

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Sangram Mazumder ◽  
Mangesh V. Pantawane ◽  
Narendra B. Dahotre
Keyword(s):  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Experimental Approach ◽  
Laser Energy ◽  
Isothermal Treatment ◽  
Thermal Treatments ◽  
Heating Rates ◽  
Temperature Oxidation ◽  
Fe Oxides ◽  
Kinetics Of

AbstractThe effect of non-isothermal treatment in oxygen-containing air, via heating rates of 10, 50, and 1000 °C/min until 1000 °C followed by furnace cooling to room temperature on oxides formed on directed laser energy additively fabricated IN718 was studied. Another set of samples heated up to 1000 °C using the same heating rates were isothermally held at 1000 °C for 1 hr followed by furnace cooling to room temperature. X-ray photoelectron spectroscopy indicated the presence of NiO on samples only heated at 1000 °C/min. Also, results indicated the absence of Fe-oxides on non-isothermally treated samples, irrespective of heating rate. However, isothermal treatment confirmed the presence of NiO on all samples and Fe-oxides on samples heated via 50 and 1000 °C/min. The durations in complement with the kinetics of the thermal treatments influenced oxide evolution in the samples. Such an experimental approach was adopted to study the material response under dynamic short duration-high temperature oxidation.

scholarly journals HIGH TEMPERATURE OXIDATION OF AISI 439 FERRITIC STAINLESS STEEL IN SYNTHETIC AIR ATMOSPHERE

2018 ◽  
Vol 80 (5) ◽  
Author(s):  
Maria de Fatima Salgado ◽  
Jackeline Macêdo de Sousa Santos ◽  
Giscard Eanes Dias Viana ◽  
João Alberto Santos Porto ◽  
Gabriel de Souza Veras Fontinele ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Oxidation Kinetics ◽  
Principal Element ◽  
Oxidation Treatment ◽  
Temperature Oxidation ◽  
X Ray ◽  
Air Atmosphere ◽  
Steel Oxidation ◽  
Kinetics Of

Stainless steels may be used and exposed to aggressive gases at high temperatures. The oxidation behavior of AISI 439 ferritic stainless steel, was investigated by oxidation treatment at 850 ºC and 950 ºC, for 50h in Synthetic Air with 20% O2 atmosphere in a tubular oven and in a thermobalance. The oxidation kinetics of films are determined by measuring the mass versus oxidation time. The microstructure and chemical composition of the oxides were determined by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS).  Chemical analysis by EDS showed that films formed on AISI 439 stainless steel exhibited Cr as the principal element in the oxide film, in proportions to form the chromium oxide (Cr2O3) and the following elements: Mn, Fe, Ti and Si. Based on the oxidation kinetics, it was observed that steel oxidation follows the parabolic behaviour with increase in temperature and it produced the highest oxidation rate at 950 ºC and the lowest rate at 850 ºC. 

Oxidation Behavior of Pd-Si Compounds

1982 ◽  
Vol 18 ◽  
Author(s):  
A. Cros ◽  
R. A. Pollak ◽  
K. N. Tu
Keyword(s):  
Chemical Analysis ◽  
Photoelectron Spectroscopy ◽  
Electron Spectroscopy ◽  
Room Temperature ◽  
Oxidation Behavior ◽  
Spillover Effect ◽  
Photoemission Spectroscopy ◽  
Temperature Oxidation ◽  
X Ray ◽  
Oxygen Dissociation

The room temperature oxidation of PdSi, Pd2Si and Pd4Si has been studied using X-ray photoelectron spectroscopy (X-ray photoemission spectroscopy or electron spectroscopy for chemical analysis). We find that only silicon atoms in these silicides are oxidized and the oxidation of Pd4Si surfaces is enhanced compared with that of Pd2Si and PdSi, as is evidenced by both a higher silicon oxidation state and thicker oxide films. This behavior is discussed in terms of silicide stability and a spillover effect where palladium atoms catalyze molecular oxygen dissociation.

Room-temperature oxidation of ultrathin TiB2 films

2002 ◽  
Vol 17 (4) ◽  
pp. 805-813 ◽  
Author(s):  
Feng Huang ◽  
W. J. Liu ◽  
J. F. Sullivan ◽  
J. A. Barnard ◽  
M. L. Weaver
Keyword(s):  
Magnetic Recording ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Oxide Thickness ◽  
Temperature Oxidation ◽  
X Ray ◽  
Force Microscopy ◽  
Application Potential ◽  
New Perspective ◽  
Protective Overcoats

Titanium diboride has been claimed as a very promising candidate material for protective applications in the magnetic recording. Its oxidation resistance at room temperature is a critical criterion in assessing this application potential. In this paper, the oxidation characteristics of ultrathin TiB2 thin films, such as overcoat erosion and oxide thickness, are investigated via a combination of x-ray reflectivity, x-ray photoelectron spectroscopy (XPS), and atomic force microscopy. It was found that a <2-h exposure to air at room temperature led to the formation of approximately 15-Å-thick, well-defined oxides at the expense of an approximately 9-Å erosion of the TiB2 overcoats, coupled with the existence of a sharp oxide/TiB2 interface. XPS studies confirmed the existence of the oxides. Considering the decreasing allowable thickness for such protective overcoats, oxidation and the resultant thickness gain negate such a potential of ultrathin TiB2 films. The results in our current report provide a new perspective on its potential as protective overcoats in magnetic recording.

Oxidation Kinetics of Mg-, Si-, and Fe-Implanted Aluminum by Using X-ray Photoelectron Spectroscopy

1999 ◽  
Vol 103 (13) ◽  
pp. 2402-2407 ◽  
Author(s):  
T. Do ◽  
N. S. McIntyre ◽  
P. A. W. van der Heide ◽  
U. G. Akano
Keyword(s):  
Photoelectron Spectroscopy ◽  
Oxidation Kinetics ◽  
X Ray ◽  
Kinetics Of
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