8YSZ热障涂层结构设计与高温性能研究  

Structural Design and Study on High Temperature Performance of 8YSZ Thermal Barrier Coating

作　　者：张文展 刘定荣 邱小林[1,2] 裘承[2,3] 廖丹[2,3] 周冬兰[2,3] 陈秋香 ZHANG Wenzhan;LIU Dingrong;QIU Xiaolin;QIU Cheng;LIAO Dan;ZHOU Donglan;CHEN Qiuxiang(Graphene and Advanced Materials Laboratory,Nanchang Institute of Technology,Nanchang 330044,China;Key Laboratory of Jiangxifor Solar Photoelectric Materials,Nanchang InstituteofTechnology,Nanchang 330044,China;Photovoltaic Cell Research Institute,Nanchang Institute of Technology,Nanchang 330044,China)

机构地区：[1]南昌理工学院石墨烯与先进材料实验室,江西南昌330044 [2]南昌理工学院江西省太阳能光电材料重点实验室,江西南昌330044 [3]南昌理工学院光伏电池研究所,江西南昌330044

出　　处：《热加工工艺》2024年第22期28-33,39,共7页Hot Working Technology

基　　金：江西省自然科学基金面上项目(20212BAB202025);江西省教育厅科学技术项目(GJJ202120);江西省大学生创新创业训练计划项目(S202212795032X);南昌理工学院自然科学技术研究项目(NLZK-21-13)。

摘　　要：采用大气等离子喷涂技术在钛合金表面制备了不同厚度的Ni CoCrAlY粘结层及8YSZ陶瓷层双层结构的热障涂层,然后利用XRD、SEM和高温性能实验等途径研究了涂层厚度对该系列涂层的物相、微观形貌、高温氧化、隔热性能及高温热冲刷力学性能的影响。结果表明:不同厚度的热障涂层都会呈现出典型的层状结构,且涂层表面存在着完全熔融态、半熔融态和未熔态等3种复杂状态。不同厚度的热障涂层都具有良好的高温抗氧化性、隔热效果和高温力学性能。陶瓷层越厚,涂层的高温抗氧化性和隔热效果越好,但钛合金基体的抗拉强度却有所下降。然而在高温工况下,陶瓷层越厚越能够有效地保障钛合金的力学性能。Double-layer structured thermal barrier coatings containing NiCoCrAlY bonding layers and 8YSZ ceramic layers with different thickness were prepared on the surface of titanium alloys by atmospheric plasma spraying technique.Then,the effects of coating thickness on the physical phase,microscopic morphology,high temperature oxidation of coating,thermal insulation performance and high temperature thermal scouring mechanical properties were investigated by XRD,SEM and high temperature performance experiments.The results show that the thermal barrier coatings of different thicknesses exhibit a typical laminar structure.And there are three complex states on the surface of the coatings,such as completely molten,semi-molten and unmelted states.The thermal barrier coatings with different thicknesses all have good high temperature oxidation resistance,thermal insulation and high temperature mechanical properties.The thicker the ceramic layer,the better the high temperature oxidation resistance and thermal insulation of the coating,but the tensile strength of the titanium alloy substrate decreases.However,the thicker the ceramic layer,the more effective the mechanical properties of the titanium alloy can be under high temperature conditions.

关 键 词：大气等离子喷涂 8YSZ 等温氧化 隔热效果 抗拉强度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]