Experimental Study on Oxidation Behavior of Q235B Steel in Oxygen-Enriched Combustion Atmosphere

2017 ◽  
Vol 89 (5-6) ◽  
pp. 641-650
Author(s):  
Fuyong Su ◽  
Zhi Wen
Keyword(s):  
Experimental Study ◽  
Oxidation Behavior ◽  
Combustion Atmosphere

Oxidation behavior of TiAl based alloys in a simulated combustion atmosphere

2004 ◽  
Vol 12 (1) ◽  
pp. 11-21 ◽  
Author(s):  
Xiang Yang Li ◽  
Shigeji Taniguchi
Keyword(s):  
Oxidation Behavior ◽  
Combustion Atmosphere

TEM Observation of the Initial Stage Oxidation of TiAl Based Alloys in a Simulated Combustion Atmosphere

2006 ◽  
Vol 522-523 ◽  
pp. 609-616
Author(s):  
Michiko Yoshihara ◽  
Shigeji Taniguchi ◽  
X.Y. Li
Keyword(s):  
Oxidation Resistance ◽  
Oxidation Behavior ◽  
Combustion Gas ◽  
Test Gas ◽  
Al Content ◽  
Initial Stage ◽  
Combustion Atmosphere ◽  
Bcc Phase ◽  
Poor Oxidation Resistance ◽  
Better Than

The oxidation behavior of Ti-48Al-2Cr-2Nb, Ti-48Al-2Cr-2W and Ti-48Al-2Cr-2Fe was studied in a simulated combustion gas, 10O2-7CO2-6H2O-bal.N2 (vol%), at 1173 K and TEM observation was performed for understanding the initial stage of oxidation behavior. Ti-48Al-2Cr-2Nb and Ti-48Al-2Cr-2W show excellent oxidation resistance in the test gas by forming thin and protective Al2O3-rich scales, while Ti-48Al-2Cr-2Fe shows poor oxidation resistance. The superior oxidation resistance of W-containing alloy is explained in terms of the formation of a bcc phase with low Al content in the alloy which was confirmed by TEM observation and also possible enhanced Al diffusion from the substrate to the scale in this phase. The oxidation resistance of the former two alloys in the test gas is better than in laboratory air, due to the lower O2 content in the test gas. The presence of H2O and CO2 in the test gas enhances the oxidation of Ti-50Al, while it has almost no influence on the oxidation behavior of these two alloys, indicating that these gases are influential to a TiO2-rich scale but not to Al2O3-rich scales.

scholarly journals Experimental study on evolution of oxidation behavior on high-temperature continuous casting slab surface

2021 ◽  
Vol 11 ◽  
pp. 2049-2058
Author(s):  
Siyuan Zhang ◽  
Mujun Long ◽  
Haohao Zhang ◽  
Songyuan Ai ◽  
Dengfu Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Continuous Casting ◽  
Oxidation Behavior ◽  
Slab Surface ◽  
Continuous Casting Slab

Progress of the Study on Corrosion Behavior of Graphite in HTGRs

2010 ◽  
Author(s):  
Peng Wang ◽  
Xinli Yu ◽  
Suyuan Yu
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Oxidation Behavior ◽  
Normal Operation ◽  
Thermal And Mechanical Properties ◽  
Computational Simulations ◽  
Water Ingress ◽  
Graphite Oxidation ◽  
Air Ingress ◽  
High Temperature Gas

The graphite has been widely used as moderator and structure materials in high-temperature gas-cooled reactors (HTGRs). However the graphite can be corroded by such oxidizing impurities as O2, H2O and CO2 in the coolant, resulting in the degradation of its thermal and mechanical properties. In addition, in water ingress and air ingress accidents, the corrosion of graphite materials is more serious. In this paper, the recent researches, which include the experimental study and computational simulations, on the graphite oxidation behavior during normal operation, water ingress and air ingress accidents were reviewed. Some significant problems concerned in the graphite oxidation for further studying were also put forward.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

Sign in / Sign up

Export Citation Format

Share Document