Phenomena involved in suspension plasma spraying part 2: Zirconia particle treatment and coating formation

被引：94

作者：

Delbos, C. ^{[1
]}

Fazilleau, J. ^{[1
]}

Rat, V. ^{[1
]}

Coudert, J. F. ^{[1
]}

Fauchais, P. ^{[1
]}

Pateyron, B. ^{[1
]}

机构：

[1] Univ Limoges, CNRS, UMR 6638,CEA M08, Lab Sci Procedes Ceram & Traitements Surface, F-87060 Limoges, France

来源：

PLASMA CHEMISTRY AND PLASMA PROCESSING | 2006年 / 26卷 / 04期

关键词：

d.c plasma spraying; suspension injection; particle size distribution; thermophoresis; particle trajectories; plasma sprayed coating;

D O I：

10.1007/s11090-006-9020-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The first part of this paper was devoted to phenomena related to liquid injection in the Suspension Plasma Spraying (SPS) process. This second part emphasizes the solid particles treatment and the coating generation. A simplified theoretical approach is proposed to evaluate the influence of the numerous experimental parameters on heat and momentum transfers from the plasma jet to individual particles. It is shown that small solid particles vanish by vaporization and are very sensitive to plasma arc fluctuations and thermophoresis effect, which makes particles to escape from the jet. This study is completed by experimental investigations concerning, first, in-flight collection of particles and, second, coating elaboration. The importance of the particle size distribution of the injected powder and the parameters for the plasma generation is demonstrated, as their choice can give either porous or dense coatings.

引用

页码：393 / 414

页数：22

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