利用激光熔覆技术制备ZrO2+MgS辅助电极涂层

利用激光熔覆技术在氧化镁稳定氧化锆(MSZ)固体电解质表面制备出了ZrO2+MgS辅助电极涂层.利用扫描电镜(SEM)和X射线衍射仪(XRD)研究了熔覆层的微观组织，并分析了影响涂层稳定性的因素.研究结果表明，熔覆层与基体结合良好，MgS粉体未完全分解和氧化，因此，利用激光熔覆法在氧化锆固体电解质表面制备ZrO2+MgS辅助电极方法可行.在1600℃时，硫分压大于10-495Pa，MgS不发生分解；氧分压为10-5578Pa时，硫分压大于10-4636Pa，MgS不发生氧化.

ZrO2+MgS Auxiliary Electrode Coating Prepared by Laser Cladding

The ZrO2+MgS auxiliary electrode coating was prepared on the surface of the MgO stabilized zirconia based solid electrolyte by laser cladding. The surface morphology and phase composition were analyzed with the scanning electronic microscope (SEM) and X ray diffractometer (XRD). The factors influenced the stability of ZrO2+MgS coatings were also analyzed. The research results showed that the cladding layer was combined well with the substrate. MgS powder were not fully decomposed and oxidized. From this work， it showed that laser cladding was an effective method to prepare ZrO2+MgS coating on the surface of the MgO stabilized zirconia based solid electrolyte. At 1600℃， if the sulfur partial pressure was higher than 10-495Pa， MgS phase did not decompose; if the oxygen pressure was 10-5578Pa and sulfur partial pressure was higher than 10-4636Pa， MgS phase did not oxidize.