期刊
JOURNAL OF THERMAL SPRAY TECHNOLOGY
卷 20, 期 4, 页码 860-865出版社
SPRINGER
DOI: 10.1007/s11666-011-9634-0
关键词
cold spray; dynamic amorphization; high-resolution transmission electron microscopy; interface bonding; phase transition
资金
- Korean government (MOST) [2006-02289]
- Natural Science Foundation of China (NSFC) [50904081]
- NSFC-KOSEF [50911140283]
Strain-rate-induced amorphization at the impact interface of Ni-Cu was observed in a cold spray process by high-resolution transmission electron microscopy. Based on finite element analysis for the evolution of impact temperature and strain, strain-rate-induced phase transformation of dynamic amorphization, dynamic recrystallization, and oriented crystallization from the prior-formed amorphous were considered the possible bonding mechanism of cold spray coatings. Besides, the disordered structure within the central strain region may result from the strain-induced melting from jetting with the subsequent fast quenching, which improves the bonding and deposition of cold sprayed coatings.
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