CAJ | 학술논문

采用磁控溅射在大气等离子喷涂的ZrO2?7%Y2O3(7YSZ)热障涂层表面制备一层厚度约15μm铝膜，对镀有铝膜的热障涂层样品在700、900°C分别保温1 h和5 h进行真空热处理。采用场发射?扫描电子显微镜对经真空热处理前后镀铝热障涂层的微观结构进行表征。采用X射线衍射和透射电子显微镜对经真空热处理前后镀铝热障涂层的物相变化进行分析。对等离子喷涂的7YSZ原始热障涂层和镀铝真空热处理后的热障涂层进行室温粒子冲刷性能对比。结果表明：镀铝热障涂层经真空热处理后在涂层表面出现疏松表层和致密底层，其成分主要为α-Al2O3，其中致密底层来源于Al膜与ZrO2的高温原位反应且该层有较高的显微硬度。此外，冲刷实验后发现镀铝真空热处理后热障涂层的冲刷性能比无镀铝热障涂层有较大的提高。
채용자공천사재대기등리자분도적ZrO2?7%Y2O3(7YSZ)열장도층표면제비일층후도약15μm려막，대도유려막적열장도층양품재700、900°C분별보온1 h화5 h진행진공열처리。채용장발사?소묘전자현미경대경진공열처리전후도려열장도층적미관결구진행표정。채용X사선연사화투사전자현미경대경진공열처리전후도려열장도층적물상변화진행분석。대등리자분도적7YSZ원시열장도층화도려진공열처리후적열장도층진행실온입자충쇄성능대비。결과표명：도려열장도층경진공열처리후재도층표면출현소송표층화치밀저층，기성분주요위α-Al2O3，기중치밀저층래원우Al막여ZrO2적고온원위반응차해층유교고적현미경도。차외，충쇄실험후발현도려진공열처리후열장도층적충쇄성능비무도려열장도층유교대적제고。
A columnar Al film was firstly deposited on the top of 7%Y2O3?stabilized zirconia (7YSZ) ceramic coating in thermal barrier coating (TBC) system by magnetron sputtering. A vacuum treatment was then carried out at 700 °C for 1 h and 900 °C for 5 h to improve the erosion resistance of Al-deposited TBC. Aα-Al2O3 layer was in situ synthesized on the top of 7YSZ coating via vacuum heat treatment. The microstructure evolution of Al-deposited TBC illustrated that a loose surface-layer and a dense sub-layer formed on the top of 7YSZ coating after vacuum treatment. The phase structures of the as-sprayed TBC and the Al-deposited TBC after vacuum heat treatment were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM) assisted with focused ion beam (FIB). Particulate erosion resistances of the as-sprayed TBC and treated TBC were compared at room temperature. In addition, erosion mechanism and schematic diagram were proposed. The results show that the Al-deposited TBC after vacuum heat treatment has better particulate erosion resistance than the as-sprayed one.