摘要
采用大气等离子喷涂制备了(La_(0.4)Sm_(0.5)Yb_(0.1))_2-Zr_2O_7(LSYZO)涂层,并在相同的条件下制备了Sm_2Zr_2O_7涂层作为对比。分别用扫描电子显微镜(SEM)和X射线衍射仪(XRD)分析LSYZO涂层的微观形貌和相结构,并对2种涂层的热导率进行测定。结果表明,等离子喷涂后LSYZO涂层的相结构未发生变化。LSYZO涂层的结合强度为22 MPa,与SZO涂层相当。LSYZO涂层热震40次后发生失效,其热导率明显低于SZO涂层,这主要与LSYZO陶瓷自身的复杂结构有关。
（La_（0.4）Sm_（0.5）Yb_（0.1））_2-Zr_2O_7（LSYZO） coating was prepared by atmospheric plasma spray. Sm_2Zr_2O_7（SZO） coating was also prepared in the same conditions as a contrast. Microstructures and phases of LSYZO coatings were investigated by scanning electrical microscopy（SEM） and X-ray diffraction（XRD）, respectively. The thermal conductivities of the two coatings were measured. The results show that the phase composition of LSYZO coating has no change after plasma spraying. The adhesion strength of LSYZO coating is 22 MPa, which is comparable with that of SZO coating. And LSYZO coating has lifetime of about 40 cycles. The thermal conductivity of LSYZO coating is lower than that of SZO coating, which mainly depends on the complex structure of LSYZO ceramic.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第10期2785-2789,共5页
Rare Metal Materials and Engineering
基金
Natural Science Foundation of China(51102016)
关键词
稀土锆酸盐
热性能
热障涂层
rare-earth zirconates
thermal properties
thermal barrier coatings
