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4 mol.% Y2O3 stabilized ZrO2(YSZ)doped with various quantities of Gd2O3(G-YSZ)ceramic coatings were synthesized by electrophoretic deposition method,and followed by vacuum sintering and isothermally annealing at 1000 oC 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 sintering at 1000 oC for 2 h under vacuum(<10-3 Pa).G-YSZ composite coatings were composed of tetragonal,monoclinic phase and a small amount of Gd2Zr2O7 phase after vacuum sintering at 1000 oC for 2 h,whereas the content of monoclinic phase in G-YSZ composite coatings increased with increasing Gd2O3 concentration.It was found that G-YSZ composite coatings were composed of tetragonal ZrO2 phase,monoclinic ZrO2 phase and cubic phase,whereas Gd2Zr2O7 phase disappeared,after G-YSZ composite coatings were isothermally annealed at 1000 oC in air for 100 h.A detailed description of the results and their discussion was presented in the paper.
4 mol.% Y2O3 stabilized ZrO2 (YSZ) doped with various quantities of Gd2O3 (G-YSZ) ceramic coatings were synthesized by electrophoretic deposition method, and followed by vacuum sintering and isothermally annealing at 1000 oC 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 sintering at 1000 oC for 2 h under vacuum (<10-3 Pa) .G-YSZ composite coatings were composed of tetragonal, monoclinic phase and a small amount of Gd2Zr2O7 phase after vacuum sintering at 1000 oC for 2 h, the content of monoclinic phase in G-YSZ composite coatings increased with increasing Gd2O3 concentration. It was found that G-YSZ composite coatings were composed of tetragonal ZrO2 phase, monocli nic ZrO2 phase and cubic phase, while Gd2Zr2O7 phase disappeared, after G-YSZ composite coatings were isothermally annealed at 1000 oC in air for 100 h. A detailed description of the results and their discussion was presented in the paper.