scholarly journals High Temperature Oxidation Behavior of Creep Resistant Steels in Water Vapour Containing Environments

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 616
Author(s):  
Mária Hagarová ◽  
Gabriela Baranová ◽  
Martin Fujda ◽  
Miloš Matvija ◽  
Peter Horňak ◽  
...  
Keyword(s):  
Water Vapour ◽  
Oxidation Rate ◽  
Oxidation Behavior ◽  
Middle Layer ◽  
Bottom Layer ◽  
Humid Atmosphere ◽  
Temperature Oxidation ◽  
Creep Resistant Steels ◽  
High Temperature Oxidation Behavior ◽  
Hematite Fe2o3

This study describes the water vapour effect on the oxidation resistance of 9Cr creep resistant steels. Boiler P91 and MarBN steels were oxidized for 3000 h in a simulated humid atmosphere with ~10% water vapour. The oxidation kinetics had a stable course for 1000 h and was evaluated by the weight gain curves for both experimental steels and both oxidation temperatures. The oxidation rate was higher at 650 °C versus 600 °C, as reflected by the oxidation rate coefficient. A significant increase occurred after 1000 h of oxidation, which was related to the local breakdown oxide scale and oxide nodules were formed on steel. This oxidation behavior was influenced by the fact that a compact spinel structure of iron oxides and alloying elements were not formed on the steel. Analysis after 3000 h of exposure showed hematite Fe2O3 formed on the outer layer, magnetite Fe3O4 on the middle layer, and the bottom layer consisted of iron-chromium-spinel (Fe,Cr)2O3.

Structure and Oxidation Behavior of Gradient Zr/ZrN/Zr Diffusion Barrier on the Ni-Based Superalloy by Arc Ion Plating

2010 ◽  
Vol 97-101 ◽  
pp. 1479-1483
Author(s):  
Yan Cai ◽  
Chun Hu Tao ◽  
Feng Lu ◽  
Jian Ping Li
Keyword(s):  
High Temperature ◽  
Diffusion Barrier ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Middle Layer ◽  
Temperature Oxidation ◽  
Arc Ion Plating ◽  
Ion Plating ◽  
Gradient Diffusion ◽  
High Temperature Oxidation Behavior

Gradient Zr/ZrN/Zr layer was deposited as a diffusion barrier between the NiCrAlYSi The overlay coating and Ni-base superalloy DZ125 by arc ion plating(AIP). The microstructure and high-temperature oxidation behavior of the diffusion barrier were studied. The results show that the gradient diffusion barrier is homogeneous and compact, and has strong bond strength with the substrate. The diffusion barrier is composed of three layers, among which the inner and outer layers are rich in Zr, and the middle layer is rich in ZrN. The main phase structure of the diffusion barrier is ZrN(200). During high temperature oxidation at 1100°C, the Zr/ZrN/Zr/HY3 compound coating system presents excellent oxidation resistance.

High temperature oxidation behavior of CrN/AlN superlattice films

2011 ◽  
Vol 519 (8) ◽  
pp. 2402-2408 ◽  
Author(s):  
Jianliang Lin ◽  
John J. Moore ◽  
Jun Wang ◽  
William D. Sproul
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Temperature Oxidation ◽  
High Temperature Oxidation Behavior
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