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Indexed by:期刊论文

Date of Publication:2009-12-01

Journal:JOURNAL OF THERMAL SPRAY TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:18

Issue:4

Page Number:686-693

ISSN No.:1059-9630

Key Words:cold spraying; high-velocity impact; numerical simulation; particle interactions

Abstract:In this study, an investigation on the effects of interactions between copper particles on coating formation was conducted by using a finite element analysis method to clarify the bonding mechanism in cold spraying. The predicted results reveal that the interactions between particles significantly affect the particle deformation and thus coating formation. When the initial parallel distance between particles is short, particles compress with the generation of gap between them. For the vertical case, the initial distance between particles also has an important effect. Short vertical distance makes the subsequent incident particle deform so weakly that the bonding performance is probably not strong enough to form a coating. Furthermore, for successive impacting particles, the subsequent incident particles will tamp the former deposited particles, causing the coating to be little porous near the surface and denser inside the coating.