Spray-drying of ceramics for plasma-spray coating

被引：147

作者：

Cao, XQ

Vassen, R

Schwartz, S

Jungen, W

Tietz, F

Stöever, D

机构：

[1] Forschungszentrum Julich, Inst Verkstoffe & Verfahren Energietech, D-52425 Julich, Germany

[2] Hunan Normal Univ, Coll Chem & Chem Engn, Hunan 410081, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2000年 / 20卷 / 14-15期

关键词：

plasma spraying; spray-drying; thermal barrier coatings; ZrO2-Al2O3;

D O I：

10.1016/S0955-2219(00)00112-6

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The spray-drying process of ceramics which are candidate materials for thermal barrier coatings (TBCs), i.e. 3YSZ + 0, 2, 4, 6 wt.% Al2O3, is discussed in this paper. The two most important properties of spray-dried powders to determine the coating quality are density and particle size. Polyethyleneimine (PEI) acts as both an organic binder and a dispersant giving low viscosity in the suspension. The optimised suspension composition is: greater than or equal to 33.6 vol.% powder + 1.8 wt.% PEI + ethanol, and operational parameters of the spray-dryer: drying temperature 175 degreesC, feeding rate 55 cm(3)/min, feeding pressure 1.013 x 10(4) Pa. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：2433 / 2439

页数：7

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