Microstructure of Suspension Plasma Spray and Air Plasma Spray Al2O3-ZrO2 Composite Coatings

被引：49
作者：
Chen, Dianying [1 ,2 ]
Jordan, Eric H. [3 ]
Gell, Maurice [1 ]
机构：
[1] Univ Connecticut, Inst Mat Sci, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA
[2] Sulzer Metco US Inc, Westbury, NY 11590 USA
[3] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2009年 / 18卷 / 03期
关键词：
alumina; amorphous powders; plasma spray coatings; suspension plasma spray; zirconia; THERMAL BARRIER COATINGS; TITANIA COATINGS; PARAMETERS; RESISTANCE; POWDERS;
D O I：
10.1007/s11666-009-9306-5
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Al2O3-ZrO2 coatings were deposited by the suspension plasma spray (SPS) molecularly mixed amorphous powder and the conventional air plasma spray (APS) Al2O3-ZrO2 crystalline powder. The amorphous powder was produced by heat treatment of molecularly mixed chemical solution precursors below their crystallization temperatures. Phase composition and microstructure of the as-synthesized and heat-treated SPS and APS coatings were characterized by XRD and SEM. XRD analysis shows that the as-sprayed SPS coating is composed of alpha-Al2O3 and tetragonal ZrO2 phases, while the as-sprayed APS coating consists of tetragonal ZrO2, alpha-Al2O3, and gamma-Al2O3 phases. Microstructure characterization revealed that the Al2O3 and ZrO2 phase distribution in SPS coatings is much more homogeneous than that of APS coatings.
引用
收藏
页码：421 / 426
页数：6
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