Laser Remelting of Plasma Sprayed Partially Yttria-Stabilized Zirconia Coatings

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Article

Abstract

A plasma-sprayed 8 wt.% yttria partially stabilized zirconia coating doped with 3 wt.% SiO2 was remelted by laser. The microstructure of the as-sprayed and laser-remelted coatings was characterized by scanning electron microscopy (SEM), electron probe microanalysis (EPMA), transmission electron microscopy (TEM), and x-ray diffraction (XRD). The effect of laser remelting on the hardness, wear resistance, and thermal shock resistance of the coatings was also studied. The laser-remelted coating consists of fine solidification grains without the presence of pores and cracks. The elements are uniformly distributed in the laser-remelted coating. Nontransformable tetragonal (t′) phase is predominant in the laser-remelted coating with a small amount of cubic phase. Laser remelting greatly enhanced the hardness, wear resistance, and thermal shock resistance of the coatings, and should find more applications.

Rights

(c) Springer, 2000.

Ouyang, J.H., & Li, X. (2000). Laser-Remelting of Plasma Sprayed Partially Yttria-Stabilized Zirconia Coatings. Journal of Materials Engineering and Performance, 9(5): 516-521.

http://dx.doi.org/10.1361/105994900770345638

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