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(hào):

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(xué)航天航空學(xué)院 機(jī)械結(jié)構(gòu)強(qiáng)度與振動(dòng)國(guó)家重點(diǎn)實(shí)驗(yàn)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‘a(chǎn)n Jiaotong University, Xi’an 710049, China)

關(guān)鍵詞:

重型燃?xì)廨啓C(jī); 高溫葉片; 熱障涂層; 燒結(jié); 模型

Keywords:

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

分類號(hào):

O34;TG174.4

DOI:

10.7502/j.issn.1674-3962.202007024

文獻(xiàn)標(biāo)志碼:

A

摘要:

燃?xì)廨啓C(jī)是清潔高效火電能源系統(tǒng)的核心動(dòng)力裝備，對(duì)保障國(guó)家能源安全和國(guó)防安全具有重要意義。燃?xì)廨啓C(jī)技術(shù)等級(jí)的主要標(biāo)志是透平前燃?xì)鉁囟人�平，目前�?guó)際先進(jìn)重型燃?xì)廨啓C(jī)的已達(dá)到1500~1600 ℃，這對(duì)燃?xì)廨啓C(jī)高溫葉片設(shè)計(jì)與制造提出了嚴(yán)峻挑戰(zhàn)。為此，科技人員提出了多種應(yīng)對(duì)方案，相對(duì)而言，熱障涂層制造成本較低，隔熱效果顯著，是國(guó)際公認(rèn)的重型燃?xì)廨啓C(jī)制造的關(guān)鍵核心技術(shù)之一。在長(zhǎng)期高溫服役環(huán)境下，熱障涂層系統(tǒng)的陶瓷隔熱層會(huì)發(fā)生顯著的燒結(jié)現(xiàn)象，從而引起涂層微結(jié)構(gòu)、力學(xué)、熱學(xué)性能的變化，嚴(yán)重影響涂層的熱障效果和安全服役�？梢�(jiàn)，陶瓷層燒結(jié)是制約熱障涂層長(zhǎng)期服役穩(wěn)定性與壽命的瓶頸之一。介紹了重型燃?xì)廨啓C(jī)熱障涂層燒結(jié)問(wèn)題的最新研究進(jìn)展，包括燒結(jié)現(xiàn)象及其表征、燒結(jié)力學(xué)模型及其行為預(yù)測(cè)、抗燒結(jié)涂層的設(shè)計(jì)及其驗(yàn)證、抗燒結(jié)參數(shù)及評(píng)價(jià)方法等，并對(duì)未來(lái)研究方向進(jìn)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.