Affiliation:
1. Korea Institute of Materials Science
2. Korea Institute of Materials
Abstract
Tungsten/copper composites were produced using an agglomerated feedstock powder by plasma spray and cold spray. In the case of the plasma spray, the external feedstock injection (EFI) and the internal feedstock injection (IFI) were adopted to compare oxidation, microstructure, porosity, and tungsten recovery in the deposits. The IFI deposit had less oxidation, denser microstructure, and more tungsten retention compared to the EFI. Especially, more tungsten particles were melted from the IFI than from the EFI at input power of 25kW. Thermal expansion coefficient of plasma sprayed composite (72W/28Cu vol.%) was approximately 5.2x10-6/K. In the cold spray, no oxidation and more dense microstructures were observed with porosity of less than 1.0 vol.%. However lots of tungsten was lost due to insufficient plastic deformation.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference8 articles.
1. L.P. Dorfman, D.L. Houck and M.J. Scheithauer: J. Mater Res. Vol. 17 (2002), p. (2075).
2. N. Akiyoshi, K. Nakada, K. Koda and H. Yamabe, M. Nakayama: Copper-tungsten alloys and their manufacturing methods, US Patent 5889220, Mar (1999), p.30.
3. C.H. Lee, H.K. Kim, H. S Choi and H.S. Ahn: Sur Coat Technol. Vol 124 (2000), p.1.
4. J.M. Lee, S.B. Kang C.Y. Lim, T. Sato and G.S. Cho: Metals and Materials Int. 9, (2003), p.459.
5. H. Assadi, F. Gärtner, T. Stoltenhoff, H. Kreye: Acta mater Vol. 51 (2003), p.4379.
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