面向21世纪的热障涂层结构设计  

Structural Design of thermal Barrier Coatings (TBCs) in 21st century

作　　者：刘凤岭[1] 

机构地区：[1]北京航空材料研究院,100095

出　　处：《材料保护》2000年第1期86-88,共3页Materials Protection

摘　　要：为适应涡轮发动机不断增长的热效率需求 ,迫切希望改进热障涂层系统在苛刻使用条件下的结构完整性和工作寿命 ,这种改进可借助于热障涂层的结构设计来实现。本文根据 2 1世纪热障涂层结构设计的需求方向 ,在分析和综合材料科学与热障涂层发展的相互关系的基础上 ,归纳了当今热障涂层结构设计的 4种基本型式 :(1)定向凝固高温合金型 ;(2 )颗粒增强复合材料型 ;(3)梯度功能材料型 ;(4 )多层膜材料型。这 4种基本型式在提高热障涂层结构完整性和工作寿命方面已初显端倪 ,完善、发展和灵活应用这些基本型式是 2 1世纪所面临的重要课题。The continually higher demand for the heat efficiency of gas turbine makes the improvement of TBCs′s structural integrity and service life under severe operation conditions necessary. This improvement can be fulfilled by the structural design of TBCs. In this paper, the possible demands for TBCs′s structural design in 21st century are predicted. Four basic models for TBCs′s structural design are provided based on the analysis of the relations between material science and TBCs. (1) Directionally solidified superalloy model; (2) Particle reinforced composite model; (3) Functionally graded material model; (4) multilayered material model. Usage of these four models shows improvement of TBCs′s structural integrity and a prolonged service life. To make these basic models more complete and more widely used are essential tasks in the 21st century.

关 键 词：热障涂层 结构设计 涂层 涂覆 表面处理 

分 类 号：TG174.4[金属学及工艺—金属表面处理]