Influence of plasma instabilities in ceramic suspension plasma spraying

被引：48

作者：

Etchart-Salas, R. ^{[1
]}

Rat, V. ^{[1
]}

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

Fauchais, P. ^{[1
]}

Caron, N. ^{[2
]}

Wittman, K. ^{[2
]}

Alexandre, S. ^{[2
]}

机构：

[1] Univ Limoges, SPCTS, Limoges, France

[2] CEA Ripault, DMA SDI LPTH, Monts, France

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2007年 / 16卷 / 5-6期

关键词：

ceramic oxide layers; fuel cells; influence of spray parameters; nano-powders;

D O I：

10.1007/s11666-007-9084-x

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Direct current Suspension Plasma Spraying (SPS) allows depositing finely structured coatings. This article presents an analysis of the influence of plasma instabilities on the yttria-stabilized suspension drops fragmentation. A particular attention is paid to the treatment of suspension jet or drops according to the importance of voltage fluctuations (linked to those of the arc root) and depending on the different spray parameters such as the plasma forming gas mixture composition and mass flow rate and the suspension momentum. By observing the suspension drops injection with a fast shutter camera and a laser flash sheet triggered by a defined transient voltage level of the plasma torch, the influence of plasma fluctuations on jet or drops fragmentation is studied through the deviation and dispersion trajectories of droplets within the plasma jet.

引用

页码：857 / 865

页数：9

共 13 条

[1] Suspension plasma spraying of nanostructured WC-12Co coatings [J].