Computational Simulation on a Coaxial Substream Powder Feeding Laval Nozzle of Cold Spraying

Medžiagotyra. 2014;20(3):271-276 DOI 10.5755/j01.ms.20.3.4244

 

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Journal Title: Medžiagotyra

ISSN: 1392-1320 (Print); 2029-7289 (Online)

Publisher: Kaunas University of Technology

Society/Institution: KTU

LCC Subject Category: Technology: Mining engineering. Metallurgy

Country of publisher: Lithuania

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS

Guosheng HUANG (ICDAST)
Daming GU (ICDAST)
Xiangbo LI (Luoyang Ship Material Research Institute)
Lukuo XING (Luoyang Ship Material Research Institute)

EDITORIAL INFORMATION

Peer review

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Time From Submission to Publication: 48 weeks

 

Abstract | Full Text

In this paper, a substream coaxial powder feeding nozzle was investigated for use in cold spraying. The relationship between nozzle structure and gas flow, the acceleration behavior of copper particles were examined by computational simulation method. Also, one of the nozzle was used to spray copper coating on steel substrate. The simulation results indicate that: the velocity of gas at the center of the nozzle is lower than that of the conventional nozzle. Powders are well restrained near the central line of the nozzle, no collision occurred between the nozzle wall and the powders. This type of nozzle with expansion 3.25 can successfully deposit copper coating on steel substrate, the copper coating has low porosity about 3.1 % – 3.8 % and high bonding strength about 23.5 MPa – 26.8 MPa. <p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.20.3.4244">http://dx.doi.org/10.5755/j01.ms.20.3.4244</a></p>