程广贵,唐荣荣,杨诚,张忠强,袁宁一,丁建宁.基于正交试验的热障涂层性能变化规律研究[J].热喷涂技术,2019,11(2):49~57.
基于正交试验的热障涂层性能变化规律研究
Study on the Variation Rules of Thermal Barrier Study on the Variation Rules of Thermal Barrier
  
DOI:10.3969/j.issn.1674-7127.2019.02.009
中文关键词:  热障涂层  大气等离子喷涂 (APS)  表面形貌  残余应力
英文关键词:Thermal barrier coating  Atmospheric plasma spraying (APS)  Surface morphology  Residual stress
基金项目:
                 
作者单位
程广贵 江苏大学 微纳米科学技术研究中心
常州大学江苏省光伏科学与工程协同创新中心
唐荣荣 江苏大学 微纳米科学技术研究中心
杨诚 华瑞( 江苏) 燃机服务有限公司
张忠强 江苏大学 微纳米科学技术研究中心
常州大学江苏省光伏科学与工程协同创新中心
袁宁一 常州大学江苏省光伏科学与工程协同创新中心
丁建宁 江苏大学 微纳米科学技术研究中心
常州大学江苏省光伏科学与工程协同创新中心
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中文摘要:
      热障涂层广泛应用于燃气轮机、飞机发动机等装备上,其性能直接影响装备的使用寿命。本文采用大气等 离子喷涂工艺,在 GH4169 高温合金表面依次制备 NiCoCrAlY 金属粘结层和 ZrO2-8%wtY2O3 陶瓷层。采用扫描 电镜和残余应力测试仪对样品的表面形貌、孔隙率以及表面的残余应力进行测试。通过正交试验研究喷涂工艺参 数对热障陶瓷层厚度、孔隙率以及残余应力的影响,实验结果表明,对陶瓷层厚度的影响因素从大到小顺序依次 为氢气流量,电流,氩气流量,喷涂距离;在相同的制备时间内,陶瓷层的厚度随着电流与氢气流量的增大而明 显的增大;随着氩气流量与喷涂距离的增大,陶瓷层的厚度随之减小;对陶瓷层孔隙率的影响因素从大到小顺序 依次为喷涂距离,氢气流量,电流,氩气流量。当氩气流量从 30 slpm/min 增加到 40 slpm/min 时,氢气流量从 5 slpm/min 增加到 10 slpm/min 时,孔隙率随之增大;当氩气流量从 40 slpm/min 增加到 50 slpm/min 时,氢气流量 从 10 slpm/min 增加到 15 slpm/min 时,孔隙率随之减小。当喷涂距离从 5 mm 增加到 10 mm 时,孔隙率随之减小, 而当喷涂距离从 10 mm 增加到 15 mm 时,孔隙率急剧升高,而随着电流的增大,孔隙率减小。 电流、氢气流量 以及氩气流量对涂层残余应力造成很大影响,随着电流以及氢气流量的增大,氩气流量的减小,涂层表面的残余 应力急剧上升。
英文摘要:
      Thermal barrier coatings are widely used in gas turbines, aircraft engines and other equipments, and their performance directly affects the service life of the equipment. In this paper, NiCoCrAlY metal bonding layer and ZrO2-8%wtY2O3 thermal barrier coating were prepared on the surface of GH4169 super alloy by atmospheric plasma spraying. The surface morphology, porosity and residual stress of the sample were tested using a scanning electron microscope and a residual stress tester. The effects of spraying process parameters on the thickness and porosity of the thermal barrier ceramic layer were investigated by orthogonal test. The experimental results show that the factors affecting the thickness of the ceramic layer are, in descending order, hydrogen flow, current, argon flow, and spray distance; during the same preparation time, the thickness of the ceramic layer increases with the increase of current and hydrogen flow rate; as the argon flow rate and spray distance increase, the thickness of the ceramic layer decreases; The factors affecting the rate from the largest to the smallest are spray distance, hydrogen flow, current, and argon flow. When the argon flow rate increases from 30 slpm/min to 40 slpm/min, the porosity increases as the hydrogen flow rate increases from 5 slpm/min to 10 slpm/min; when the argon flow rate increases from 40 slpm/min to 50 slpm /min, When the hydrogen flow rate increases from 10 slpm /min to 15 slpm/min, the porosity decreases. When the spraying distance is increased from 5 mm to 10 mm, the porosity is decreased, and when the spraying distance is increased from 10 mm to 15 mm, the porosity sharply increases, and as the current increases, the porosity decreases.The current, hydrogen flow rate and argon flow rate have a great influence on the residual stress of the coating. As the current and the flow rate of hydrogen increase, the flow rate of the argon gas decreases, and the residual stress on the surface of the coating rises sharply.
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