scholarly journals Effect of Surface Finish on High-Temperature Oxidation of Steels in CO2, Supercritical CO2, and Air

2019 ◽  
Vol 92 (5-6) ◽  
pp. 525-540 ◽  
Author(s):  
Richard P. Oleksak ◽  
Gordon R. Holcomb ◽  
Casey S. Carney ◽  
Lucas Teeter ◽  
Ömer N. Doğan
Keyword(s):  
High Temperature ◽  
Surface Finish ◽  
Supercritical Co2 ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Effect Of Surface

High-Temperature Oxidation of Commercial Alloys in Supercritical CO2 and Related Power Cycle Environments

JOM ◽  
2018 ◽  
Vol 70 (8) ◽  
pp. 1527-1534 ◽  
Author(s):  
Richard P. Oleksak ◽  
Joseph H. Tylczak ◽  
Casey S. Carney ◽  
Gordon R. Holcomb ◽  
Ömer N. Doğan
Keyword(s):  
High Temperature ◽  
Supercritical Co2 ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Power Cycle

scholarly journals The Role of Substrate Surface Roughness on in-Pack Aluminization Kinetics of Ni-Base Superalloy

2020 ◽  
Vol 4 (1) ◽  
pp. 15 ◽  
Author(s):  
Wojciech J. Nowak ◽  
Małgorzata Tomków ◽  
Patrycja Wierzba ◽  
Kamil Gancarczyk ◽  
Bartek Wierzba
Keyword(s):  
Surface Roughness ◽  
High Temperature ◽  
High Temperature Oxidation ◽  
Substrate Surface ◽  
Surface Preparation ◽  
Temperature Oxidation ◽  
Diffusion Layers ◽  
Substrate Surface Roughness ◽  
Effect Of Surface

The Ni-base superalloys facing high temperature require further protection against high temperature oxidation. One of the most common methods providing high temperature oxidation resistance is the production of aluminide layers (NiAl-coatings). It is known that the thickness of produced diffusion layer can be controlled by the temperature and time of aluminization process. However, no research on the effect of surface roughness on aluminization kinetics was conducted so far. Then, to elucidate the effect of surface roughness on aluminization kinetics, diffusion layers were obtained by an in-pack aluminization method on the IN 617 alloy with differently prepared surfaces, namely polished, ground using 220 grit SiC paper and 80 grit SiC paper. The obtained results revealed that different surface preparation does not affect the chemical and phase composition of produced layers. However, a strong influence of surface preparation method on aluminide layers thicknesses was observed. Namely, it was found that the increase in substrate surface roughness results in an increase of aluminization kinetics. The dependence between surface roughness and thickness of aluminide layers was found to be logarithmic. Moreover, it was found that the aluminization kinetics is influenced, especially at early stages of the aluminization process.

scholarly journals The Effect of Surface Machining on the High-Temperature Oxidation of a Single Crystal Ni-Based Superalloy

2014 ◽  
Vol 55 (10) ◽  
pp. 1540-1546 ◽  
Author(s):  
Nairong Sun ◽  
Lanting Zhang ◽  
Zhigang Li ◽  
Feng Sun ◽  
Xianping Dong ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Surface Machining ◽  
Effect Of Surface
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