A gas shroud nozzle for HVOF spray deposition

被引：0
|
作者：
Pershin, V [1 ]
Mostaghimi, J [1 ]
Chandra, S [1 ]
Coyle, T [1 ]
机构：
[1] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON, Canada
来源：
THERMAL SPRAY, VOLS 1 AND 2: MEETING THE CHALLENGES OF THE 21ST CENTURY | 1998年
关键词：
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Properties of MCrAlY coatings obtained by High Velocity Oxy-Fuel (HVOF) thermal spray process operated in a standard configuration were compared with those obtained using a gas shroud attachment to the HVOF gun. Our measurements show that the attached gas (nitrogen) shroud nozzle considerably reduces the oxygen content in the coating without an appreciable change in the microstructure. The particle temperatures were decreased by an average of 100 C at a standoff distance of 0.275 m (11 inches). There was also a large reduction in the particle velocity at this distance. Both these effects were related to the excessive amount of nitrogen used for shroud.ing.
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页码：1305 / 1308
页数：4
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