Nanoindentation creep behavior of an Fe–Cr–Mo–B–C amorphous coating via atmospheric plasma spraying

2022 ◽  
Vol 141 ◽  
pp. 107411
Author(s):  
Q. Dong ◽  
J. Tan ◽  
R. Huang ◽  
H.L. Wang ◽  
P. Song ◽  
...  
2012 ◽  
Vol 557-559 ◽  
pp. 1768-1771
Author(s):  
Xiao Bing Zhao ◽  
Zhi Hui Ye

Fe-based amorphous coating was prepared on stainless steel substrates by atmospheric plasma spraying (APS) using Fe-based amorphous powder as feedstock. Microstructures of the coating were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM). The corrosion behavior of coating and stainless steel were evaluated respectively in 3.5% NaCl, 10% NaOH and 1 mol/L H2SO4 aqueous solutions by electrochemical workstation. The results indicated that the coating was composed of most amorphous phase and some Fe-Cr crystalline phase. The coating exhibited the better corrosion resistance in H2SO4 solution, while the worse in NaOH.


2021 ◽  
Author(s):  
Zheyi Zhang ◽  
Yizhaotong Ai ◽  
Xinghua Zhong ◽  
Yin Zhuang ◽  
Jing Sheng ◽  
...  

Abstract This study mainly investigated the formation mechanism of Al2O3-YAG(Al5Y3O12) amorphous coating prepared by atmospheric plasma spraying. Nano and micro-sized powders with low eutectic point ratio were selected as raw materials for comparison. XRD, SEM and EBSD were used to analyze the phase composition, morphologies, phase distribution and structure of the coating. The crystal structures of the possible existed phases were studied to analyze the crystallization chemistry of powder droplets. It is concluded that the composition ratio of powders and particle size should be also considered as the key factors for the preparation of amorphous coatings besides the high enthalpy and ultra-fast cooling rate of thermal spray technology. The as-sprayable powder chose multiple components with low eutectic point ratio distributed uniformly at nano-scale or sub-micro scale, and can reacted to form the new phase crystal with high coordination numbers of cations.


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