Phenomena involved in suspension plasma spraying part 1: Suspension injection and behavior

被引：140

作者：

Fazilleau, J. ^{[1
]}

Delbos, C. ^{[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; suspension droplets; characteristic times; droplets fragmentation; plasma imaging; voltage fluctuations;

D O I：

10.1007/s11090-006-9019-1

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Suspension Plasma Spraying (SPS) is a relatively new deposition process which enables to spray micron and submicron particles. It offers the possibility to form finely structured coatings with intermediate thicknesses of a few tens of microns. In order to have a better understanding in SPS, the two parts of this paper are devoted to the description of the phenomena involved in this spray process. The first part focuses on the suspension injection within a d.c. plasma jet. Simplified models, backed by plasma and suspension diagnostics, allow describing the interaction plasma-suspension. It is shown that the suspension is atomized by the plasma jet before the starting of the droplets vaporization. The plasma jet recovers its flow symmetry about 15 mm downstream of the nozzle exit. The strong influence of plasma instabilities on suspension injection is also highlighted. The second part is devoted to solid particle treatments and the coating formation.

引用

页码：371 / 391

页数：21

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