INFLUENCE OF THE COATING THICKNESS ON THE COOLING RATES OF PLASMA-SPRAYED PARTICLES IMPINGING ON A SUBSTRATE

被引：30

作者：

MOREAU, C

LAMONTAGNE, M

CIELO, P

机构：

[1] National Research Council Canada, Industrial Materials Institute, Boucherville, Que. J4B 6Y4

来源：

SURFACE & COATINGS TECHNOLOGY | 1992年 / 53卷 / 02期

关键词：

D O I：

10.1016/0257-8972(92)90111-M

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermal histories of plasma-sprayed molybdenum particles during and after impingement on different substrates were monitored using a fast two-colour pyrometer and the influence of the coating thickness on the lamella cooling rate was investigated. The cooling rate was found to increase with coating thickness owing to the low thermal resistance at the molybdenum-molybdenum lamella interfaces and to the relatively high thermal conductivity of the sprayed molybdenum lamellae. The lower cooling rates observed at the coating-substrate interface were associated with changes in the lamella microstructure, the lamellae within the coating having a columnar structure while this structure was absent in lamellae at the coating-substrate interface.

引用

页码：107 / 114

页数：8

共 17 条

[1]

CLINE TW, 1984, METALL T B, V15, P369

[2]

FLEMINGS MC, 1974, SOLIDIFICATION PROCE, pCH11

[3]

GROT AS, 1981, AM CERAM SOC BULL, V60, P807

[4]

HOUBEN JM, 1984, 2ND P NAT C THERM SP, P1