Characterization of low- and high-temperature oxidation processes under non-premixed diesel-engine-like conditions

2012 ◽  
Vol 13 (6) ◽  
pp. 628-638 ◽  
Author(s):  
Miroslaw Weclas ◽  
Jochen Cypris
Keyword(s):  
High Temperature ◽  
Diesel Engine ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Processes

Microstructure characterization of high-temperature, oxidation-resistant Si-B-C-N films

2013 ◽  
Vol 542 ◽  
pp. 167-173 ◽  
Author(s):  
Jie He ◽  
Minghui Zhang ◽  
Jiechao Jiang ◽  
Jaroslav Vlček ◽  
Petr Zeman ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Microstructure Characterization ◽  
Temperature Oxidation ◽  
Oxidation Resistant

High Temperature Erosion-Corrosion in Gas Turbines

1982 ◽  
Author(s):  
J. Stringer
Keyword(s):  
High Temperature ◽  
Gas Turbines ◽  
High Temperature Oxidation ◽  
Metal Loss ◽  
Protective Oxide ◽  
Temperature Oxidation ◽  
Oxidation Processes ◽  
Erosion Corrosion ◽  
Burning Coal ◽  
High Temperature Erosion

Under certain circumstances, hot gases containing particulates may be expanded through a turbine. The erosion damage due to the particulates interacts with the high temperature oxidation processes. The interaction may be positive: the oxide layer may be more erosion-resistant than the substrate. The interaction may be negative: the erosion can remove the protective oxide resulting in accelerated metal loss. If the gases contain corrosive materials such as alkali sulfates as well as the particulates, further interactions are possible. These processes are of importance in gas turbine expanders for pressurized fluidized bed combustors burning coal, and several research projects are in progress to study them.

Electron Probe Microanalysis (EPMA) Characterization of Scales Formed on Laves Phase Reinforced Cr Alloys at 1100°C in Air

1999 ◽  
Vol 5 (S2) ◽  
pp. 852-853
Author(s):  
L.R. Walker ◽  
M.P. Brady
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Complex Mixture ◽  
Laves Phase ◽  
Temperature Oxidation ◽  
Heat Treated ◽  
Structural Applications ◽  
Temperature Fracture

Laves phase (Cr2X) strengthened Cr solid solution [Cr(X)]-based alloys are under development for a variety of high-temperature structural applications. Among the most promising alloys are castings based on the Cr(Ta)-Cr2Ta eutectic, which exhibit room-temperature fracture toughness in the 10-12 MPa√m range and creep rupture lives in excess of 1000 h at 1000° (138 MPa) in air. These alloys exhibit superior high-temperature oxidation resistance to previously developed Cr(Nb)-Cr2 Nb based alloys despite the general similarities of Ta and Nb. In order to optimize high-temperature oxidation resistance an understanding of why the Cr(Ta)-Cr2Ta alloys are more oxidation resistant is needed. Detailed EPMA characterization of the oxidized scaleswas initiated as a first steptowards gaining this understanding.Fig. 1 shows a backscattered electron image of cast and heat treated and heat treated Cr-10Nb at.% after a 6 cycle, 120 h exposure at 1100°C in humid air. Most of the coupon was converted to a complex mixture of Cr-, Nb-, and Cr+ Nb- oxides.

scholarly journals Quantitative characterization of high temperature oxidation using electron tomography and energy-dispersive X-ray spectroscopy

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Jihan Zhou ◽  
Matthew Taylor ◽  
Georgian A. Melinte ◽  
Ashwin J. Shahani ◽  
Chamila C. Dharmawardhana ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Electron Tomography ◽  
Energy Dispersive ◽  
Quantitative Characterization ◽  
Temperature Oxidation ◽  
X Ray
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