Laser surface treatment of plasma-sprayed yttria-stabilized zirconia coatings

被引：0
作者：
Pinto, MA [1 ]
Osorio, WR [1 ]
Lima, CRP [1 ]
García, A [1 ]
Ierardi, MCF [1 ]
机构：
[1] Univ Estadual Campinas, UNICAMP, Dept Mat Engn, BR-13083970 Campinas, SP, Brazil
来源：
REVISTA DE METALURGIA | 2005年
关键词：
laser surface treatment; yttria-stabilised zirconia; plasma-sprayed; corrosion resistance;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A continuous wave CO2 laser with a defocused beam has been employed to seal the surface layer of plasma-sprayed of 8wt. % yttria-stabilised zirconia coatings on AISI 1045 steel Substrate. The effect of laser remelting on microstructure and corrosion resistance of plasma-sprayed layer was investigated. The microstructure of the sealed layer presented a cellular structure which grows perpendicular to the surface. The micrographs have shown small cracks and absence of porosity. The corrosion resistance was analysed by the EIS and polarisation tests by using a 3 % NaCl solution. Laser sealing improved the corrosion resistance of the coating and increased the microhardness.
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页码：154 / 159
页数：6
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