XPS Analysis of Oxide Formed on the Surface of Co-28Cr-6Mo-1Si Alloy Oxidized at 550°C

2020 ◽  
Vol 845 ◽  
pp. 95-100
Author(s):  
Phacharaphon Tunthawiroon ◽  
Mettaya Kitiwan ◽  
Patthranit Wongpromrat ◽  
Akihiko Chiba
Keyword(s):  
Oxide Film ◽  
Photoelectron Spectroscopy ◽  
Profile Analysis ◽  
Chemical Compositions ◽  
Xps Analysis ◽  
Depth Profile Analysis ◽  
Oxidation Treatment ◽  
X Ray ◽  
Low Concentrations ◽  
Xps Depth Profile

This work investigated the influence of oxidation durations on the formation of oxide on the surface of wrought Co-28Cr-6Mo-1Si alloy. The iso-thermal oxidation was individually performed in air at 550°C for 4, 12 and 24 h. For comparison, the surface of the non-oxidized Co-28Cr-6Mo-1Si alloy was concurrently examined. The chemical compositions of the non-oxidized and oxidized alloys were principally analyzed via X-ray photoelectron spectroscopy (XPS). The XPS results revealed that the surface of the non-oxidized alloy enriched in Cr-oxide. After oxidation treatment, the Co-oxide, existing as Co2+ state was observed coexisting with two Cr-oxide states, Cr3+ and Cr4+. The low concentrations of Mo6+ were also observed on the oxidized alloy surface. With the increase in oxidation durations, the Co-oxide was suppressed by Cr-oxide. The XPS depth profile analysis indicated that the thickness of the oxide film increased with increasing the oxidation duration.

Influence of Liquid Evaporation on the Components of SiC High Emissivity Coating

2010 ◽  
Vol 434-435 ◽  
pp. 568-571
Author(s):  
J. Yi ◽  
Xiao Dong He ◽  
Chun Long Guan
Keyword(s):  
Photoelectron Spectroscopy ◽  
Physical Vapor Deposition ◽  
Profile Analysis ◽  
Si Substrate ◽  
Depth Profile Analysis ◽  
X Ray ◽  
Evaporation Temperature ◽  
Liquid Evaporation ◽  
Amorphous Sic ◽  
Xps Depth Profile

The process of Electron Beam-Physical Vapor Deposition (EB-PVD) preparing SiC coating with liquid evaporation was firstly discussed from a thermodynamic viewpoint. The results showed that the ratio of SiC in the as-deposited coating gradually increases and tends to reach a stable maximum of 0.73 with the evaporation temperature increase from 2500 K to 3400 K. To verify the thermodynamic analysis, amorphous SiC coating was deposited on Si substrate by EB-PVD at 3100 K. SiC concentration across the cross section of coating was calculated from the area of elements spectrum in X-ray photoelectron spectroscopy (XPS) depth profile analysis. The results showed that the average SiC concentration was about 0.7.

X-Ray Photoelectron Spectroscopy Sputter Depth Profile Analysis of Spatially Controlled Microstructures in Conductive Polymer Films

1991 ◽  
Vol 63 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Susan G. MacKay ◽  
Mohammad. Bakir ◽  
Inga H. Musselman ◽  
Thomas J. Meyer ◽  
Richard W. Linton
Keyword(s):  
Depth Profile ◽  
Polymer Films ◽  
Photoelectron Spectroscopy ◽  
Profile Analysis ◽  
Conductive Polymer ◽  
Depth Profile Analysis ◽  
X Ray

scholarly journals Structure and Characterization of TiC/GLC Multilayered Films with Various Bilayers Periods

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 787
Author(s):  
Weiqi Wang ◽  
Xiaoming Ling ◽  
Rui Wang ◽  
Wenhao Nie ◽  
Li Ji ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Chemical Compositions ◽  
Closed Field ◽  
Multilayered Structures ◽  
Multilayered Films ◽  
Sputtering Deposition ◽  
X Ray ◽  
Mechanical And Tribological Properties ◽  
Self Organizing

The spontaneously self-organizing multilayered graphite-like carbon (denoted as GLC) /TiC films with various bilayer periods in the range of 13.3–17.5 nm were deposited on silicon and 1Cr18Mn8Ni5N stainless steel substrates using closed field magnetron sputtering deposition facility. The microstructures and chemical compositions of the prepared multilayered films were characterized by scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy respectively. The self-organizing multilayered structures in all of the films consisted of titanium carbide layers and sp2-rich carbon layers periodically alternate arrangement. The TiC contents and bilayer periods of the multilayered films can be controlled by means of adjusting of sputtering current of graphite target. Furthermore, the mechanical and tribological performances of the prepared films were appraised by nano-indentor, scratch measures, and ball-on-plate tribometer respectively. The results indicated that multilayer structure endowed the as-deposited TiC/GLC films outstanding mechanical and tribological properties, especially the multilayer film with 15.9 nm bilayer period deposited at 10 A sputtering current showed the excellent adhesion strength and hardness; Simultaneously it also exhibited the lowest average friction coefficient in the humid environment owing to its high content of sp2 hybrid carbon.

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