Influence of Spraying Angle on the Properties of Plasma Sprayed AT13 Ceramic Coatings
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摘要: 采用大气等离子喷涂(APS)系统制备了微米和纳米Al2O3-13%TiO2(AT13)陶瓷涂层,研究了喷涂角度对涂层单道次增加厚度、涂层组织、结合强度和硬度的影响。结果表明:随着喷涂角度的减小,两种涂层单道增厚降低,孔隙率增加,结合强度降低,硬度未发生明显变化。喷涂角度为90°时,微米AT13和纳米AT13陶瓷涂层状态均良好,纳米AT13陶瓷涂层单道增厚较微米AT13高出21.5%。喷涂角度为45°时,纳米AT13陶瓷涂层较微米AT13陶瓷涂层单道增厚高出47%,结合强度高出42.1%。喷涂角度为30°时,微米AT13陶瓷涂层出现了严重的缺陷,纳米AT13陶瓷涂层也出现了较大的孔隙。Abstract: Micro-and nano-Al2O3-13%TiO2 coatings are sprayed by using the APS system. The influences of the spray angle on the increased thickness of a single pass, coating microstructure, hardness and bonding strength are studied. The results show that with the decrease of the spraying angle, the increased thickness of a single pass and binding strength decrease, that the porosities of the two coatings increase, and that the hardness does not change significantly. When the spray angle is 90°, the two coatings are in good condition, and the increased thickness of a single pass of the nano-Al2O3-13%TiO2 coating is 21.5% higher than that of the micro-Al2O3-13%TiO2 coating. When the spray angle is 45°, the increased thickness of a single pass and bonding strength of the former are 47% and 42.1% higher than those of the latter. When the spray angle is 30°, the microAl2O3-13%TiO2 coating has serious defects, and the nano-Al2O3-13%TiO2 coating also has large pores. The hardness of the micro-Al2O3-13%TiO2 coating is slightly higher than that of nano-Al2O3-13%TiO2.
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Keywords:
- APS /
- AT13 /
- spray angle /
- adhesive strength /
- increased thickness of a single pass
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