文章信息/Info

Title:

Research on Interface Control and Bonding Strength of Thermal Spraying Ceramic Top-Coats and Metal Bond-Coats

文章編號:

1674-3962(2020)10-0754-09

作者:

李喬磊; 宋鵬; 黃太紅; 翟瑞雄; 李超

（昆明理工大學材料科學與工程學院，云南 昆明 650093）

Author(s):

LI Qiaolei; SONG Peng; HUANG Taihong; ZHAI Ruixiong; LI Chao

(Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

關鍵詞:

熱噴涂; 涂層; 粘結強度; 界面結構; 連續梯度; 納米復合梯度涂層

Keywords:

thermal spraying;  coating;  bonding strength;  interface structure;  continuous gradient;  nanocomposite continuous coating

分類號:

TG174.442

DOI:

10.7502/j.issn.1674-3962.202004005

文獻標志碼:

A

摘要:

熱噴涂陶瓷涂層具有優異的耐磨、防腐、隔熱等性能，能賦予金屬/合金零部件良好的極端環境服役性能，被廣泛應用于航空航天、軍事、交通運輸等領域機械零部件表面，是極端環境服役零部件表面防護的最佳選擇之一。為減小基體與陶瓷涂層的應力梯度，噴涂陶瓷涂層過程中通常先在基體表面制備一層金屬或合金粘結層。由于陶瓷的熱膨脹系數、彈性模量、晶體結構等與金屬或合金粘結層的差異較大，因此粘結層與陶瓷層的界面力學性能直接決定了整個材料的服役壽命，成為制約該領域快速發展的瓶頸之一。綜述了熱噴涂陶瓷層與粘結層界面的最新研究進展，介紹了雙層結構涂層的耦合界面、雙層結構涂層的原位氧化物釘扎界面、使界面模糊化的連續梯度過渡界面和納米復合連續梯度過渡界面；系統地綜述了通過制備工藝、界面結構和粘結層材料優化進行界面調控的研究；并對不同界面結構的涂層粘結強度進行對比分析；最后總結了熱噴涂粘結層與陶瓷層界面研究現階段面臨的突出問題和未來的發展方向。

Abstract:

Thermal spraying ceramic coating has excellent wear resistance, corrosion resistance, thermal insulation and other properties, which can give metal/alloy parts good extreme environmental service properties. It is one of the best choices for surface protection of extreme environmental service parts, and is widely used in mechanical parts in aerospace, military, transportation and other fields. In order to reduce the stress gradient between the substrate and the ceramic coating, the alloy/ metal bond-coats is usually prepared on the surface of the substrate. Because the thermal expansion coefficient, elastic modulus and crystal structure of ceramic top-coats are quite different from the metal/alloy bond-coats, the interface mechanical properties directly determine the service life of the entire material, which has become one of the bottlenecks restricting the rapid development of this field. Based on this, the recent research progress of the interface between the thermal spraying bond-coats and the ceramic top-coats is reviewed. The coupling interface of the double layer structure coating, the in�瞫itu oxide nailing interface of the double layer structure coating, the continuous gradient transition interface that blurs the interface and the optimized nanocomposite continuous gradient transition interface are introduced. The coating bond strength with different interface structures is compared. Finally, the outstanding problems and the future development direction of the interface between thermal spraying bond-coats and ceramic top-coats are summarized.