期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 209, 期 2, 页码 922-929出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2008.03.005
关键词
Cold gas dynamic spray; Titanium; Porosity; Direct fabrication
Cold gas dynamic spray (cold spray) is a deposition technology in which particles achieve supersonic velocities. Commercial purity titanium (CP Ti) is directly fabricated to exploit the potential for cold spray to be utilised as a new fabrication technology. Deposition parameters for elimination of porosity were identified. Results show that using helium as the deposition gas has a significant influence on the elimination of pores. The volume fraction of porosity decreased with a decrease in the distance between the nozzle and the substrate. Furthermore, a decrease in average particle size led to a reduction in porosity of the deposited material. The results show that the directly fabricated CP Ti exhibits a higher hardness compared with wrought CP Ti. Optimisation of cold spray parameters led to a significant reduction of pores in directly fabricated parts. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
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