期刊
SURFACE & COATINGS TECHNOLOGY
卷 203, 期 19, 页码 2851-2857出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2009.02.135
关键词
Laser-assisted Cold Spray; Thermal spray; Titanium; Oxygen; HVOF
资金
- Engineering & Physical Sciences Research Council
Laser-assisted Cold Spray (LCS) is a new coating and fabrication process which combines the supersonic powder beam found in Cold Spray (CS) with laser heating of the deposition zone. LCS combines some advantages of CS: solid-state deposition, high build rate and the ability to deposit metals onto a range of substrates, with reduced operating costs which arise from not using a gas heater and replacing helium with nitrogen as the process gas. A system has been developed to impact metallic powder particles onto a substrate which is locally heated using a diode laser. A pyrometer and control system are used to record and maintain impact site temperature. In this study, < 50 mu m powder particles are measured to be traveling at around 400 ms(-1), and heated to temperatures between 450 degrees C and 900 degrees C when they impact the substrates. Build rates of up to 45 g min(-1) were achieved for deposits with less than 1% porosity. Oxygen and nitrogen content in the deposits were measured to be less than 0.6 wt.% and 0.03 wt.% respectively. (c) 2009 Elsevier B.V. All rights reserved
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