CAJ | 학술논문

采用大气等离子喷涂技术制备了纳米氧化锆热障涂层。利用FESEM、XRD和拉曼光谱开展了纳米氧化锆热障涂层的微观组织和物相组成的高温演变研究。微观组织分析结果表明，纳米氧化锆热障涂层始终保持着独特的“纳米-微米”双态结构，而其中纳米晶粒大小随着服役温度和服役时间的增加而增大，但仍保持纳米结构；物相分析结果表明，纳米氧化锆热障涂层主要由非平衡四方相组成，并不随服役环境的变化而变化；而拉曼峰形状及位置的变化则进一步揭示了高温服役环境会造成涂层组织缺陷减少和声子散射降低，从而导致热导率的上升。
채용대기등리자분도기술제비료납미양화고열장도층。이용FESEM、XRD화랍만광보개전료납미양화고열장도층적미관조직화물상조성적고온연변연구。미관조직분석결과표명，납미양화고열장도층시종보지착독특적“납미-미미”쌍태결구，이기중납미정립대소수착복역온도화복역시간적증가이증대，단잉보지납미결구；물상분석결과표명，납미양화고열장도층주요유비평형사방상조성，병불수복역배경적변화이변화；이랍만봉형상급위치적변화칙진일보게시료고온복역배경회조성도층조직결함감소화성자산사강저，종이도치열도솔적상승。
Nanostructured yttria-stabilized zirconia (YSZ) coatings were deposited by atmospheric plasma spraying method, and the microstructure and phase composition of coatings were analyzed by FESEM, XRD and Raman spectra techniques in order to research the evolution of high-temperature properties of coating. The microstructure results show that a special "nano-micro" double-state structure always kept in the nano YSZ coatings, and the grain size gradually increased along with the rise of working temperature and time but still maintained nano size. The results of phase composition show that the metastable tetragonal phase is the unique phase in nano YSZ coatings and doesn't change with the working environment. While the changes of raman peak shape and position revealed that the condition of high temperature made the structure defects of coating decrease and the phonon scattering depress, which caused the rise of thermal conductivity ofnano YSZ coatings.