摘要
4 mol.% Y203 stabilized ZrO2 （YSZ） doped with various quantifies of Gd203 （G-YSZ） ceramic comings were synthesized by electrophoretic deposition method, and followed by vacuum sintering and isothermally annealing at 1000 ℃ for different durations. X-ray diffraction （XRD） was used to investigate their phase composition. Scanning electron microscopy （SEM） was employed to examine their microstructure, while energy dispersive X-ray spectrometer （EDS） was used to assess composition of the composite coatings. The results indicated that YSZ coating was composed of tetragonal and monoclinic phase after vacuum sintefing at 1000 ~C for 2 h under vacuum （〈103 Pa）. G-YSZ composite coatings were composed of tetmgonal, monoclinic phase and a small amount of Gd2Zr207 phase after vacuum sintering at 1000 ℃ for 2 h, whereas the content ofmonoclinic phase in G-YSZ composite coatings in- creased with increasing Gd203 concentration. It was found that G-YSZ composite coatings were composed of tetragonal ZrO2 phase, monoclinic ZrO2 phase and cubic phase, whereas Gd2Zr207 phase disappeared, after G-YSZ composite coatings were isothermally annealed at 1000 ℃ in air for 100 h. A detailed description of the results and their discussion was presented in the paper.
4 mol.% Y203 stabilized ZrO2 （YSZ） doped with various quantifies of Gd203 （G-YSZ） ceramic comings were synthesized by electrophoretic deposition method, and followed by vacuum sintering and isothermally annealing at 1000 ℃ for different durations. X-ray diffraction （XRD） was used to investigate their phase composition. Scanning electron microscopy （SEM） was employed to examine their microstructure, while energy dispersive X-ray spectrometer （EDS） was used to assess composition of the composite coatings. The results indicated that YSZ coating was composed of tetragonal and monoclinic phase after vacuum sintefing at 1000 ~C for 2 h under vacuum （〈103 Pa）. G-YSZ composite coatings were composed of tetmgonal, monoclinic phase and a small amount of Gd2Zr207 phase after vacuum sintering at 1000 ℃ for 2 h, whereas the content ofmonoclinic phase in G-YSZ composite coatings in- creased with increasing Gd203 concentration. It was found that G-YSZ composite coatings were composed of tetragonal ZrO2 phase, monoclinic ZrO2 phase and cubic phase, whereas Gd2Zr207 phase disappeared, after G-YSZ composite coatings were isothermally annealed at 1000 ℃ in air for 100 h. A detailed description of the results and their discussion was presented in the paper.
基金
Project supported by Shanghai Municipal Developing Foundation of Science and Technology (0852nm01400)
National Training Programs of Innovation for Undergraduates (201210856022)
Science and Technology Key Fund Project of Shanghai University of Engi-neering Science (2011XZ07) for financial support
