scholarly journals Study on water vapor corrosion resistance of rare earth monosilicates RE2SiO5 (RE = Lu, Yb, Tm, Er, Ho, Dy, Y, and Sc) from first-principles calculations

Heliyon ◽  
2018 ◽  
Vol 4 (10) ◽  
pp. e00857 ◽  
Author(s):  
Jing Han ◽  
Yanfei Wang ◽  
Rongjun Liu ◽  
Di Jiang
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Water Vapor ◽  
First Principles ◽  
First Principles Calculations ◽  
Water Vapor Corrosion

Magnetic structure and bonding of rare-earth diboride compounds R B2 : First-principles calculations

2012 ◽  
Vol 249 (7) ◽  
pp. 1470-1476 ◽  
Author(s):  
S. Kacimi ◽  
B. Bekkouche ◽  
A. Boukortt ◽  
F. Zazoua ◽  
M. Djermouni ◽  
...  
Keyword(s):  
Rare Earth ◽  
Magnetic Structure ◽  
First Principles ◽  
First Principles Calculations ◽  
Structure And Bonding

Computational and Experimental Insights into the Role of Acidic Molecules on the Corrosion Behavior on 7A46 Aluminum Alloy

2021 ◽  
Vol 21 (4) ◽  
pp. 2221-2233
Author(s):  
Yaru Liu ◽  
Qinglin Pan ◽  
Xiangdong Wang ◽  
Ye Ji ◽  
Qicheng Liu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
First Principles ◽  
First Principles Calculations ◽  
Corrosive Media ◽  
Corrosion Depth ◽  
Corrosion Mechanisms ◽  
Nanoscale Level

The corrosion mechanisms for different corrosive media on the aged 7A46 aluminum alloy were systematically investigated at nanoscale level. The combination of empirical intergranular and exfoliation corrosion behavior was employed, and coupled with first-principles calculations. Results revealed that the dispersed distribution of matrix precipitates (MPs) leads to the enhancement of the corrosion resistance pre-ageing (PA) followed by double-ageing (PA-DA) alloy. The deepest corrosion depth of PA-DA alloy was in hydrochloric acid, and the calculation result demonstrates that the passivation effect in combination with the accumulation of corrosion products in nitric acid protect the PA-DA alloy from further corrosion.

Electronic Structure of Rare-Earth Scandates from X-Ray Spectroscopy and First-Principles Calculations

2012 ◽  
Vol 438 (1) ◽  
pp. 45-54
Author(s):  
A. V. Postnikov ◽  
C. Derks ◽  
K. Kuepper ◽  
M. Neumann
Keyword(s):  
Electronic Structure ◽  
Rare Earth ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray

High Temperature Hydro Corrosion Resistance of Silica Based Oxide Ceramics

2003 ◽  
Author(s):  
Shunkichi Ueno ◽  
Naoki Kondo ◽  
D. Doni Jayaseelan ◽  
Tatsuki Ohji ◽  
Shuzo Kanzaki
Keyword(s):  
Phase Transition ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
Water Vapor ◽  
High Temperature ◽  
Corrosion Test ◽  
Oxide Ceramics ◽  
Rich Phase ◽  
Water Vapor Corrosion ◽  
Phase Phase

Water vapor corrosion behavior of Ln2Si2O7 (Ln = Nd, Er, Lu), mullite, CaYb4Si3O13 and Al2O3 were investigated at 1500°C. In Ln2Si2O7 phases, Ln = Nd and Er samples were completely dissolved in water vapor environment. CaYb4Si3O13 phase underwent decomposition during the corrosion test. Lu2Si2O7 and mullite showed excellent water vapor corrosion protection. In the case of mullite, Al2O3 rich phase was formed on the surface and the corrosion progression was successfully protected. In the case of Lu2Si2O7 phase, phase transition occurred and the grain boundaries of surface layer were slightly corroded by the corrosion test.

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