CAJ | 학술논문

采用大气等离子喷涂技术制备纳米ZrO2热障涂层，采用金相显微镜、X射线衍射仪、拉伸试验机等对涂层组织及性能进行了研究。结果表明，纳米ZrO2热障涂层组织均匀，面层内孔隙较小、呈近圆形，孔隙率为9．6％；涂层由t-ZrO2单相组成，其平均结合强度和平均剪切强度较传统微米ZrO2热障涂层分别提高63．5％和50．5％，分别达到46．63MPa和23．97MPa；同时涂层具有优异的抗腐蚀性能和耐湿热能力，腐蚀和湿热试验后涂层完整、表面清洁，无新相生成。
채용대기등리자분도기술제비납미ZrO2열장도층，채용금상현미경、X사선연사의、랍신시험궤등대도층조직급성능진행료연구。결과표명，납미ZrO2열장도층조직균균，면층내공극교소、정근원형，공극솔위9．6％；도층유t-ZrO2단상조성，기평균결합강도화평균전절강도교전통미미ZrO2열장도층분별제고63．5％화50．5％，분별체도46．63MPa화23．97MPa；동시도층구유우이적항부식성능화내습열능력，부식화습열시험후도층완정、표면청길，무신상생성。
The microstructure and properties of nano-ZrO2 thermal barrier coatings fabricated by plasma spraying technology were studied using optical microscopy, X-ray diffractometer and tensile testing machine, etc. The experimental results show that nano-ZrO2 thermal barrier coatings have uniform microstructure, which composed of t-ZrO2 phase. The pores in ceramic top layer are almost fine and round, and porosity reaches to 9.6%. The average cohesion strength and average shear strength of coatings reach to 53.83MPa and 26.97MPa, respectively, which increase 63.5% and 50.5% than .those of traditional micro ZrO2 thermal barrier coatings. At same time the coatings have better corrosion resistance and hygrothermal resistance. The coatings have whole and cleaning surface without forming no new phases after testing.