文章信息/Info

Title:

Research Progress in the Real�睺ime Acoustic Emission Characterization of Failure in Thermal Barrier Coatings

文章編號:

1674-3962(2020)11-0878-19

作者:

楊麗1; 2;  周益春2; 朱旺2

（1. 西安電子科技大學(xué)先進材料與納米科技學(xué)院, 陜西 西安 710126）（2. 湘潭大學(xué)材料科學(xué)與工程學(xué)院, 湖南 湘潭 411105）

Author(s):

YANG Li1; 2;  ZHOU Yichun2;  ZHU Wang2

（1.School of Advanced Materials and Nanotechnology, Xidian University, Xi‘a(chǎn)n 710126, China）（2. School of Materials and Engineering, Xiangtan University, Xiangtan 411105, China）

關(guān)鍵詞:

熱障涂層; 裂紋演變; 聲發(fā)射檢測; 模式識別; 失效機理

Keywords:

TBCs;  crack evolution;  acoustic emission technology;  crack mode identification;  failure mechanisms

分類號:

V261.93+3;V23

DOI:

10.7502/j.issn.1674-3962.202007034

文獻標(biāo)志碼:

A

摘要:

耐高溫、高隔熱的熱障涂層能有效降低渦輪葉片金屬基底工作溫度，從而提高發(fā)動機的熱效率與性能，被列為航空發(fā)動機的關(guān)鍵熱防護技術(shù)。然而，在燃氣熱沖擊、沖蝕、腐蝕等惡劣環(huán)境中服役時，熱障涂層極易產(chǎn)生涂層裂紋、界面裂紋、變形等多種損傷，并最終以涂層剝落的形式失效。采用聲發(fā)射技術(shù)實時無損檢測服役環(huán)境下熱障涂層裂紋萌生與演化的過程，是表征涂層失效過程、揭示其機理進而預(yù)測最終剝落的有效手段。闡述了熱障涂層裂紋演化的高溫聲發(fā)射檢測方法，并著重從損傷模式、定量評估方法及基于此的熱障涂層失效機理等研究方面，介紹了熱障涂層失效的聲發(fā)射實時表征技術(shù)的研究進展，并對其發(fā)展趨勢進行了展望。

Abstract:

Thermal barrier coatings (TBCs), with high temperature durability and excellent heat insulation, can effectively reduce the working temperature of metal base made for turbine blade, bringing about a significant improvement in both efficiency and performance of engines. Therefore, TBCs have been continually developed as a key thermal protection technique for aero-engines. However, TBCs are likely to be subject to serious damage like coating crack, interface crack, deformation and so on under serving at the complicated environment including gas shock, erosion, corrosion, etc., which finally will peel off and fail to function. Acoustic emission technology can real-timely detect crack’s initiation and evolution process in TBCs nondestructively, which is an effective method to supervise the failure process, discover the failure mechanism and predict the failure-time for TBCs. In this paper, research progress of the high temperature acoustic emission technology on detection of the failure for TBCs will be introduced, and the method itself, crack mode identification, quantitative damage evaluation and failure mechanisms of TBCs obtained based on the method will all be elaborated in detail.