循环热载下的热障涂层失效概率影响因素分析  

Analysis of Factors Affecting the Failure Probability of Thermal Barrier Coatings Under Cyclic Thermal Loading

作　　者：王鲁斌 王卫泽[1] 万江玲 周宗盛 汪骏皓 WANG Lubin;WANG Weize;WAN Jiangling;ZHOU Zongsheng;WANG Junhao(Key Laboratory of Pressure System and Safety,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;Ningbo Institute of Dalian University of Technology,Ningbo 315016,Zhejiang,China;Zhejiang CRRC Electric Vehicle Co.,Ltd.,Ningbo 315111,Zhejiang,China)

机构地区：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237 [2]大连理工大学宁波研究院,宁波浙江315016 [3]浙江中车电车有限公司,宁波浙江315111

出　　处：《热喷涂技术》2025年第1期112-118,共7页Thermal Spray Technology

基　　金：国家高技术研究发展计划(863计划)(2023YFB3711200);国家自然科学基金(52175136;52130511);燃气轮机科学中心项目(P2021-A-IV-002)。

摘　　要：热障涂层(TBCs)在工业燃气轮机及航空发动机中的广泛应用,已成为提升这些设备使用寿命的关键技术。然而,在实际使用过程中,热障涂层从基材上脱落的现象严重威胁着设备的安全运行与可靠性。涂层脱落失效受到多种因素的影响,本研究根据之前开发的失效概率评估方法对影响涂层失效概率的三个主要因素进行分析。研究结果表明,热源半径和冷却速率对涂层的失效概率影响较大,保温时间的影响相对较小。失效概率与热源半径的大小成正比,热源半径越大,相同时间内涂层的失效概率越大;陶瓷层(TC)与氧化层(TGO)界面应力与换热系数成正比,冷却速率越大,界面应力增长的速率越快,涂层损伤累积速度越快。研究循环热载下热障涂层的失效概率影响因素,可以更加准确地理解涂层在复杂工况下的行为表现。The widespread application of Thermal Barrier Coatings(TBCs)in industrial gas turbines and aero-engines has been identified as a critical technology for prolonging the working lifespan of these systems.Nonetheless,in practical use,the spalling of the TBCs from the substrate significantly threatens the safety and dependability of the equipment.The failure of coating peeling is influenced by several factors.This study evaluated three primary factors influencing coating failure using a previously established failure probability evaluation method.The findings indicate that the radius of the heat source and the cooling rate significantly influence the failure probability of the TBCs,while the impact of the retention time barely.The probability of failure is directly related to the radius of the heat source.Furthermore,the TC/TGO interfacial stress is directly corresponding to the heat transfer coefficient;a higher cooling rate results in a more rapid increase in interfacial stress and accelerates the development of coating damage.Investigating the failure mechanisms and influencing factors of thermal barrier coatings(TBCs)under cyclic thermal loading offers deeper insights into coating behavior under complex operating conditions.Such studies enhance our understanding of how TBCs perform in real-world applications,enabling the development of more reliable and durable coatings.

关 键 词：热障涂层 残余应力 失效预测 可靠性评估 概率统计 

分 类 号：TG174.4[金属学及工艺—金属表面处理]