scholarly journals Optical study of supersonic jet structure in atmospheric plasma spraying

2018 ◽  
Author(s):  
I. P. Gulyaev ◽  
M. P. Golubev ◽  
V. I. Kuzmin ◽  
P. A. Tyryshkin
Keyword(s):  
Plasma Spraying ◽  
Supersonic Jet ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Optical Study ◽  
Jet Structure

Effect of binary rare earth oxide on the properties of plasma sprayed Al2O3/TiO2 coatings

2017 ◽  
Vol 69 (5) ◽  
pp. 808-814
Author(s):  
Qingjun Ding ◽  
Bo Tian ◽  
Gai Zhao ◽  
Feng Wang ◽  
Huafeng Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Plasma Spraying ◽  
Adhesion Strength ◽  
Rare Earth Oxide ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Micro Hardness ◽  
Content Type ◽  
Melting Degree ◽  
Binary Rare Earth

Purpose This study systematically investigated the effect of the binary rare earth oxide of La2O3 and Sm2O3 on the properties of the Al2O3/TiO2 (AT) coating, including phase transform, wear behavior, etc. Design/methodology/approach AT coatings mixed with different components of binary rare earth oxides of La2O3 and Sm2O3 are prepared by atmospheric plasma spraying. The adhesion strength, micro-hardness, phase transition and tribological behavior of coatings are systematically investigated. Findings The X-ray diffraction (XRD) analysis shows that phase transformation is obvious after spraying, and a-Al2O3 is almost translated into γ-Al2O3 when La2O3 and Sm2O3 are doped together. Meanwhile, solid solution generated between rare earth oxide and Al2O3/TiO2 coatings results in disappearance of TiO2 and rare earth oxide phase. The photos under the scanning electron microscope (SEM) indicate that binary rare earth oxide could increase the melting degree of powder and decrease porosity of coatings.The increasing of Sm2O3 rarely affect micro-hardness and adhesion strength, and the coating with 4 per cent Sm2O3 and 1 per cent La2O3 exhibits the best wear resistance and lowest friction coefficient among all the samples. Originality/value AT coatings mixed with different components of binary rare earth oxide of La2O3 and Sm2O3 are prepared by atmospheric plasma spraying. Binary rare earth oxide could increase the melting degree of powder and decrease porosity of AT coatings.

Tribological and Thermal Properties of Mullite Coating Prepared by Atmospheric Plasma Spraying

2013 ◽  
Vol 23 (3) ◽  
pp. 410-419 ◽  
Author(s):  
Yulong An ◽  
Xiaoqin Zhao ◽  
Guoliang Hou ◽  
Huidi Zhou ◽  
Jie Chen ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Plasma Spraying ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Mullite Coating
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