self-fluxing alloy coatings were deposited by high velocity oxy-fuel (HVOF) spraying. Annealing treatment was applied to the as-sprayed coatings to develop the microstructure of the -based coating. The microstructure of the coating was characterized using optical microscopy, x-ray diffraction and transmission electron microscopy. The crystallization behavior of the amorphous coating was also characterized by differential scanning calorimetry. The properties of the coating were characterized by microhardness and abrasive wear tests. The results showed that the as-sprayed HVOF coating deposited by well melted spray particles exhibited a dense microstructure of amorphous phase. It was revealed that the crystallization of the amorphous phase in HVOF coating occurs at a temperature of about . Annealing at temperature a little higher than recrystallization temperature leads to the formation of the nano-crystalline microstructure. The subsequent nanostructured -based coating presents higher microhardness and excellent wear performance. With the further increase in annealing temperature, the growth of the nano-crystalline grains occurs and, accordingly, the microhardness of the coating and the wear performance decrease. Thereafter, the microstructure and properties of the -based self-fluxing alloy coating can be controlled through postannealing treatment.
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September 2004
Research Article|
September 23 2004
Effect of nano-crystallization of high velocity oxy-fuel-sprayed amorphous alloy on properties of the coatings
Chang-Jiu Li;
Chang-Jiu Li
a)
State Key Laboratory for Mechanical Behavior of Materials, Welding Research Institute, School of Materials Science and Engineering
, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, People’s Republic of China
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Yu-Yue Wang;
Yu-Yue Wang
State Key Laboratory for Mechanical Behavior of Materials, Welding Research Institute, School of Materials Science and Engineering
, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, People’s Republic of China
Search for other works by this author on:
J. Vac. Sci. Technol. A 22, 2000–2004 (2004)
Article history
Received:
October 27 2003
Accepted:
June 01 2004
Citation
Chang-Jiu Li, Yu-Yue Wang, Hua Li; Effect of nano-crystallization of high velocity oxy-fuel-sprayed amorphous alloy on properties of the coatings. J. Vac. Sci. Technol. A 1 September 2004; 22 (5): 2000–2004. https://doi.org/10.1116/1.1776183
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