CAJ | 학술논문

运用电子扫描电镜(SEM)、X射线衍射仪(XRD)等设备,对采用等离子喷涂方法制备的热障涂层进行了组织结构、氧化动力学、高温热腐蚀动力学、高温隔热性能、抗热震以及结合强度等性能分析.结果表明:原始态的氧化锆涂层微观组织良好,涂层为非转变四方相结构,热生长氧化物(TGO)层是影响热障涂层性能的主要原因,涂层体系经400小时预氧化仍具有良好的抗氧化性但不耐熔盐腐蚀,1100℃涂层的热冲击性能满足500周次循环要求,涂层结合强度呈抛物线特性.
운용전자소묘전경(SEM)、X사선연사의(XRD)등설비,대채용등리자분도방법제비적열장도층진행료조직결구、양화동역학、고온열부식동역학、고온격열성능、항열진이급결합강도등성능분석.결과표명:원시태적양화고도층미관조직량호,도층위비전변사방상결구,열생장양화물(TGO)층시영향열장도층성능적주요원인,도층체계경400소시예양화잉구유량호적항양화성단불내용염부식,1100℃도층적열충격성능만족500주차순배요구,도층결합강도정포물선특성.
The microstructure, oxidation dynamics, high temperature corrosion resistance, thermal conductivity, thermal shock resistance and bond strength of the plasma sprayed thermal barrier coating were investigated with the instruments including SEM, XRD, etc. The results show that the coating has good microstructure in the as sprayed state and is consist of un-transient cubic crystalline structure. The Thermally Grown Oxidation (TGO) layer is the main factor influencing the coating property. The coating system shows good oxidation resistance after 400 hours' high temperature exposure, while with insufficient molten salt corrosion resistance. The thermal shock resistance under 1100℃ satisfies 500 cycles' requirement and the bond serength shows a feature of the parabolic curve.