scholarly journals High-temperature oxidation of heat-resistant alloys with small amounts of sulfur and reactive elements (Y,Hf) for 1800ks at 1273K.

2001 ◽  
Vol 13 (1/2) ◽  
pp. 58-59
Author(s):  
Tadaaki AMANO ◽  
Megumi MIYAZAKI ◽  
Hironori SAWAFUJI ◽  
Daisuke HATAKEYAMA ◽  
Naoki SAKAI ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Reactive Elements ◽  
Temperature Oxidation ◽  
Heat Resistant

scholarly journals High Temperature Oxidation Resistance on Heat-Resistant Alloys with Small Additions of Reactive Elements.

1993 ◽  
Vol 5 (4) ◽  
pp. 110
Author(s):  
Tadaaki Amano ◽  
Kaoru Michiyama ◽  
Yasuhiko Nakajima ◽  
Nobutaka Suzuki ◽  
Hideyoshi Matsumoto ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Reactive Elements ◽  
Temperature Oxidation ◽  
Heat Resistant

scholarly journals High-temperature oxidation of heat-resistant alloys with small amounts of sulfur and reactive elements (Y,Hf) for 1800ks at 1373K.

2001 ◽  
Vol 13 (1/2) ◽  
pp. 64-65 ◽  
Author(s):  
Tadaaki AMANO ◽  
Takahiro OZAWA ◽  
Keiko KUDO ◽  
Norihiro MATSUMOTO ◽  
Naoki SAKAI ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Reactive Elements ◽  
Temperature Oxidation ◽  
Heat Resistant

scholarly journals High-temperature oxidation of Al2O3-forming heat-resistant alloys with small amounts of sulfur and reactive elements at 1373 and 1473K.

2000 ◽  
Vol 12 (1/2) ◽  
pp. 86-88
Author(s):  
Tadaaki AMANO ◽  
Kei SASAMOTO ◽  
Taizo HIRATA ◽  
Takayuki NISHINAKA ◽  
Naoki SAKAI ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Reactive Elements ◽  
Temperature Oxidation ◽  
Heat Resistant

High-Temperature Oxidation Behaviors of 30Cr25Ni20Si Heat-Resistant Steel in Air

2020 ◽  
Vol 861 ◽  
pp. 83-88
Author(s):  
You Yang ◽  
Xiao Dong Wang
Keyword(s):  
High Temperature ◽  
Oxide Film ◽  
High Temperature Oxidation ◽  
Film Growth ◽  
Surface Oxidation ◽  
Mass Gain ◽  
Resistant Steel ◽  
Temperature Oxidation ◽  
Heat Resistant Steel ◽  
Heat Resistant

High temperature oxidation dynamic behaviors and mechanisms for 30Cr25Ni20Si heat-resistant steel were investigated at 800, 900 and 1000°C. The oxide layers were characterized by scanning electron microscopy (SEM-EDS), X-ray diffractometer (XRD). The results showed that the oxidation rate of test alloys is increased with increasing the oxidation time. The oxidation dynamic curves at 800 and 900°C follow from liner to parabolic oxidation law. The transition point is 10 h. At 1000°C, the steel exhibits a catastrophic oxidation, and the oxidation mass gain value at 50 h is 0.77 mg/cm2. This suggests that the steel at 900°C has formed a dense protective surface oxidation film, effectively preventing the diffusion of the oxygen atoms and other corrosive gas into the alloy. Therefore, at the first stage of oxidation, chemical adsorption and reaction determine the oxide film composition and formation process. At the oxide film growth stage, oxidation is controlled by migration of ions or electrons across the oxide film. When the spinel scale forms, it acts as a compact barrier for O element and improving the oxidation resistance.

scholarly journals Properties of High Temperature Oxidation of Heat-resistant Steel with Aluminium and Copper

2019 ◽  
Vol 25 (4) ◽  
pp. 394-400
Author(s):  
Hong LI ◽  
Chengzhi ZHAO ◽  
Tao YAN ◽  
Chao DING ◽  
Hexin ZHANG ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxide Films ◽  
Main Element ◽  
Resistant Steel ◽  
Temperature Oxidation ◽  
Heat Resistant Steel ◽  
X Ray ◽  
Heat Resistant ◽  
Test Steel

The research is focused on a novel aluminum and copper-containing heat-resistant steel. The steel was designed by the material performance simulation software JmatPro, performed high-temperature oxidation tests at 650 °C and 700 °C atmospheric conditions, and analyzed the high-temperature oxidation processes and its mechanisms.The phase transtions and surface morphology of the oxide films were studied using X-ray diffraction (XRD), electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the equilibrium phase of the test steel is composed of γ phase and δ phase at 1050 °C and tranforms to tempered martensite and δ-Fe mixed structure after heat treatment. The preferential oxidation of Fe and Cr and the internal oxidation of Al occurred during the high temperature oxidation of the test steel. The oxide films were formed with various shape and weak bonding properties after high-temperature oxidation at 650℃. To the contrary, the oxide films more regular and evenly distributed, and has a certain protective effect after high-temperature oxidation at 700 ℃. The oxide films were divided into two layers, Fe2O3 is main element in the outer layer, the inner layer is mainly consisting the oxide of Cr. However, the addition of Cu element can promote the diffusion of Al and Si elements, which is beneficial to the formation of Al2O3 and SiO2 protective oxide films and excellent in high temperature oxidation resistance.

scholarly journals High-temperature oxidation behavior of heat-resistant alloys with small amounts of sulfur.

1999 ◽  
Vol 11 (1) ◽  
pp. 7-13
Author(s):  
Tadaaki AMANO ◽  
Susumu ARAI ◽  
Yuko MAEKAWA ◽  
Masayuki KOBAYASHI ◽  
Akira HARA ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Temperature Oxidation ◽  
Heat Resistant ◽  
High Temperature Oxidation Behavior
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