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论文类型：期刊论文

发表时间：2009-12-01

发表刊物：JOURNAL OF THERMAL SPRAY TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：18

期号：4

页面范围：686-693

ISSN号：1059-9630

关键字：cold spraying; high-velocity impact; numerical simulation; particle interactions

摘要：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.