The lamellar structure of a detonation gun sprayed Al2O3 coating

被引：58

作者：

Li, CJ ^{[1
]}

Ohmori, A ^{[1
]}

机构：

[1] OSAKA UNIV,WELDING RES INST,IBARAKI,OSAKA 567,JAPAN

来源：

SURFACE & COATINGS TECHNOLOGY | 1996年 / 82卷 / 03期

关键词：

thermal spraying; detonation gun; coating structure; lamellar bonding Al2O3;

D O I：

10.1016/0257-8972(95)02670-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The structural features of a detonation gun sprayed Al2O3 coating were examined using a copper electroplating technique. It is revealed that the detonation gun sprayed Al2O3 coating has a typical layer structure similar to that of coatings deposited using other thermal spraying processes. Despite having the highest particle velocity of the thermal spraying processes, lamellar bonding at the interfaces between flattened particles in detonation gun sprayed Al2O3 coatings is very poor. The mean bonding ratio of bonded interface area to apparent bonding interface for a typical detonation gun Al2O3 coating is about 10%, which is less than one-third the value for a typical plasma-sprayed Al2O3 coating. However, the high particle velocity results in the formation of a rough surface on the spray splat which may be effective in enhancing interlocking between flattened particles.

引用

页码：254 / 258

页数：5