Oxide phase development upon high temperature oxidation of γ-NiCrAl alloys

2006 ◽  
Vol 57 (3) ◽  
pp. 269-275 ◽  
Author(s):  
T. J. Nijdam ◽  
N. M. van der Pers ◽  
W. G. Sloof
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxide Phase ◽  
Temperature Oxidation ◽  
Phase Development ◽  
Nicral Alloys

scholarly journals Oksida kaya-Si Tingkatkan Rintangan Pengoksidaan Struktur Terkimpal Al-Mg-Si Pada Suhu 400oC dan 600oC

2020 ◽  
Vol 77 (1) ◽  
pp. 51-68
Author(s):  
Nur Azida Che Lah ◽  
Muhamad Hellmy Hussin
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Filler Metal ◽  
Welding Process ◽  
Protective Layer ◽  
Oxide Phase ◽  
Phase Changes ◽  
Temperature Oxidation ◽  
Heating And Cooling ◽  
Welded Structure

At high temperatures the Al-Mg-Si alloy structure is characterized by low resistance due to the complex oxidation effects involving the formation of layers or scale oxides and internal degradation. The situation becomes more complex when this alloy undergoes a welding process of metal bonding that involves heating and cooling. Subsequently, the welded structure is exposed to high temperature oxidation resulting in different oxide formation and phase changes. Therefore, the present study aims to determine the effect of high temperature oxidation on Al-Mg-Si alloy welded joint using ER 4043 (Al-5% Si) filler metal. The analysis and characterization of samples include morphology and microstructure using OM and SEM / EDX, and the oxide phase was determined using XRD. The addition of 5% Si from the filler metal and the formation of SiO2 on the surface of the welded structure due to the oxidation exposure was found to be effective in lowering the oxidation level by reducing penetration of oxygen diffusion into the alloy substrate. SiO2 also helps strengthen the Al2O3 protective layer. In conclusion, the use of an ER 4043 as a filler metal containing a 5% of Si as a major secondary element in the Al-Mg-Si welded structure is suitable for high temperature applications.

The action of borates as inhibitors for the high temperature oxidation of alloys

1980 ◽  
Vol 295 (1413) ◽  
pp. 334-335 ◽  
Keyword(s):  
High Temperature ◽  
Surface Coating ◽  
High Temperature Oxidation ◽  
Oxide Phase ◽  
Temperature Oxidation ◽  
Diffusion Limited ◽  
Ex Post ◽  
Ex Post Facto ◽  
Effective Development ◽  
Limited Process

The oxidation of metals and alloys at high temperature is usually considered to be a diffusion limited process, controlled ultimately by the concentration of defective lattice sites in the growing oxide film. Measures for controlling rates of oxidation usually depend, therefore, on replacing the oxide phase normally formed by another with a more favourable structure, or by doping the oxide to reduce the concentration of defects. These measures require the presence of a modifying agent either as a constituent of the alloy or as a relatively thick surface coating, and very few cases are known in which useful effects have been obtained by applying traces of material to the surface. There has therefore been no effective development of inhibitors for high temperature oxidation analogous to the well known inhibitors of wet corrosion, suitable for application ex post facto .

Behaviour of copper during the high temperature oxidation of steels produced by the electric furnace route

2003 ◽  
Vol 100 (1) ◽  
pp. 73-82
Author(s):  
Y. Riquier ◽  
D. Lassance ◽  
I. Li ◽  
J. M. Detry ◽  
A. Hildenbrand
Keyword(s):  
High Temperature ◽  
Electric Furnace ◽  
High Temperature Oxidation ◽  
Temperature Oxidation

High Temperature Oxidation Behaviors of Fe-Cr-Al Based Powder Porous Metal and a Strip

2013 ◽  
Vol 51 (10) ◽  
pp. 743-751 ◽  
Author(s):  
Seon-Hui Lim ◽  
Jae-Sung Oh ◽  
Young-Min Kong ◽  
Byung-Kee Kim ◽  
Man-Ho Park ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Porous Metal ◽  
Temperature Oxidation ◽  
Oxidation Behaviors

Effect of CaO Addition on the High-Temperature Oxidation of Mg Alloys

2016 ◽  
Vol 54 (6) ◽  
pp. 390-399 ◽  
Author(s):  
Dong Bok Lee ◽  
Shae Kwang Kim ◽  
Soon Yong Park
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Mg Alloys ◽  
Temperature Oxidation
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