Graded thermal barrier coatings, deposited by EB-PVD

被引：39
|
作者：
Movchan, BA [1 ]
Yakovchuk, KY [1 ]
机构：
[1] EO Paton Welding Inst, Int Ctr EB PVD Technol, UA-03150 Kiev, Ukraine
来源：
SURFACE & COATINGS TECHNOLOGY | 2004年 / 188卷
关键词：
electron beam evaporation and deposition (EB-PVD); thermal barrier-graded coating; gas turbine blades; zirconium dioxide; composite ingot;
D O I：
10.1016/j.surfcoat.2004.08.006
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Variants of graded thermal barrier coating (TBC) are given, which consist of bond coats of NiAl or MCrAlY+NiAl and YSZ-based outer ceramic layer, produced in a one-step cycle by evaporation of a composite ingot. A design of the composite ceramic ingot is considered, as well as the ability to regulate in a broad range the composition and structure of the bond coats, outer ceramic layer, as well as the transition barrier zones of the substrate/bond coat and bond coat/outer ceramic layer. Distributions of chemical elements in the coating/substrate system and microstructure after deposition and after heat treatment are shown. Results are given of furnace thermal cycling tests of various types of graded TBC at 1150 degreesC. Design of a new generation of electron beam units for deposition of the above coatings and cost-effectiveness of the one-step deposition process are described. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码：85 / 92
页数：8
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