文章信息/Info

Title:

Advances on the Sintering of Thermal Barrier Coatings for High Temperature Blade of Industrial Gas Turbines

文章編號:

1674-3962(2020)11-0855-16

作者:

呂伯文; 江鵬; 李定駿; 王鐵軍

（西安交通大學航天航空學院 機械結構強度與振動國家重點實驗室，陜西 西安 710049）

Author(s):

LV Bowen;  JIANG Peng;  LI Dingjun;  WANG Tiejun

(State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi‘an Jiaotong University, Xi’an 710049, China)

關鍵詞:

重型燃氣輪機; 高溫葉片; 熱障涂層; 燒結; 模型

Keywords:

industrial gas turbine;  high temperature blade;  thermal barrier coating;  sintering;  modeling

分類號:

O34;TG174.4

DOI:

10.7502/j.issn.1674-3962.202007024

文獻標志碼:

A

摘要:

燃氣輪機是清潔高效火電能源系統的核心動力裝備，對保障國家能源安全和國防安全具有重要意義。燃氣輪機技術等級的主要標志是透平前燃氣溫度水平，目前國際先進重型燃氣輪機的已達到1500~1600 ℃，這對燃氣輪機高溫葉片設計與制造提出了嚴峻挑戰。為此，科技人員提出了多種應對方案，相對而言，熱障涂層制造成本較低，隔熱效果顯著，是國際公認的重型燃氣輪機制造的關鍵核心技術之一。在長期高溫服役環境下，熱障涂層系統的陶瓷隔熱層會發生顯著的燒結現象，從而引起涂層微結構、力學、熱學性能的變化，嚴重影響涂層的熱障效果和安全服役�？梢姡�陶瓷層燒結是制約熱障涂層長期服役穩定性與壽命的瓶頸之一。介紹了重型燃氣輪機熱障涂層燒結問題的最新研究進展，包括燒結現象及其表征、燒結力學模型及其行為預測、抗燒結涂層的設計及其驗證、抗燒結參數及評價方法等，并對未來研究方向進行了展望。

Abstract:

Gas turbine is the key technical equipment in the clean and efficient thermal power energy system, which is of great significance to ensure national energy security and national defense security. As the main technical parameter of gas turbine, the turbine inlet temperature has reached 1500~1600 ℃, which poses a severe challenge to the design and manufacture of high temperature blade of gas turbine. Therefore, a variety of technologies were used to improve the performance of blades, such as the directional/single crystal forming technology of superalloy blade, film cooling technology and thermal barrier coating (TBC) technology. Moreover, the TBC technology has attracted great attention due to low cost and a remarkable thermal insulation effect. However, sintering occurs in the ceramic insulation layer during the long-term service of TBC system in high temperature environment, which affects the thermal barrier effect and safety of the coating. Therefore, restraining the sintering phenomenon is the key technology to improve the service stability and life of TBC. Based on the above background, the research progress on the TBC sintering was introduced on emphasis, including the sintering phenomenon and characterization, mechanics models for sintering, structure design of sintering resistant TBC and the sintering resistance evaluation. Finally, the future prospect and development directions of TBC technology were forecasted.