Effect of Laser Remelting on Hot Corrosion Behavior of Ni3Al and Ni-20Cr Plasma-Sprayed Coatings

CORROSION ◽  
2005 ◽  
Vol 61 (11) ◽  
pp. 1098-1106 ◽  
Author(s):  
B. S. Sidhu ◽  
S. Prakash
Keyword(s):  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Laser Remelting ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Corrosion behavior of Cr3C2–NiCr vacuum plasma sprayed coatings

2008 ◽  
Vol 202 (18) ◽  
pp. 4566-4571 ◽  
Author(s):  
M. Suarez ◽  
S. Bellayer ◽  
M. Traisnel ◽  
W. Gonzalez ◽  
D. Chicot ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Vacuum Plasma ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Laser remelting of plasma-sprayed coatings on cobalt-based alloys

1990 ◽  
Vol 41 (3) ◽  
pp. 365-376 ◽  
Author(s):  
Jiun-Ren Hwang ◽  
Ying-Shyang Shan ◽  
Ji-Liang Doong
Keyword(s):  
Laser Remelting ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Effects of Laser Remelting on Microstructural Characteristics and Hot Corrosion Behavior of MСrAlY Coating Prepared by Plasma Spraying

2019 ◽  
Vol 971 ◽  
pp. 70-76 ◽  
Author(s):  
Dong Sheng Wang
Keyword(s):  
Plasma Spraying ◽  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Tial Alloy ◽  
Surface Oxidation ◽  
Corrosion Property ◽  
Laser Remelting ◽  
Mcraly Coating ◽  
Before And After ◽  
Plasma Sprayed

Plasma spraying technique was used to prepare MCrAlY coating on TiAl alloy surface, the coating was treated through the laser remelting process, and then scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to analyze surface topography and phase composition before and after hot corrosion behavior of the coating. Results indicate that after laser remelting treatment, lamellar structure of the coating disappears with improved compactness and most defects like pores and inclusion eliminated. Plasma sprayed MCrAlY coating can significantly improve hot corrosion property of TiAl alloy, which can be further improved after laser remelting. MCrAlY coating mainly experiences surface oxidation reaction and internal sulfurization reaction during the hot corrosion in the high-temperature molten salt, which mainly generate corrosion products such as Al2O3, Cr2O3, NiO, NiCr2O4, Ni3S2 and CrS.

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