Abstract
Surface modifications and features of materials alloying under pulsed plasma exposures are investigated in this paper. The experiments were carried out with a pulsed plasma gun, which generates plasma streams with ion energies of up to 2 keV, a plasma density of (2–\(20)\times 10^{14}~{\rm cm}^{-3}\), an average specific power of 10 MW/cm2 and plasma energy densities in the range of (5–\(40)~{\rm J/cm}^{2}\). Nitrogen, helium, hydrogen, oxygen and different mixtures can be used as working gases. Modification of thin (1–2 μm) PVD coatings of molybdenum coating mixed with substrate in liquid phase under the pulsed plasma processing are analyzed. After alloying of ferritic/martensitic steel EP-823 with Mo the concentration of molybdenum in the modified layer of 15–20 μm achieved 20% for single treatment cycle and 30% after two cycles. Decrease of grain sizes (from tens of μm to hundreds of nm), roughness and porosity were obtained by plasma irradiation of thick (~0.1–0.3 mm) plasma sprayed coatings of Co-32Ni-21Cr-8Al-0.5Y and Ti64. A modified layer with homogeneous structure and thickness up to 50 μm is formed as a result of plasma treatment. Mechanisms of surface modification of WC-Co under irradiation with pulsed plasma streams of different ions are discussed.
Similar content being viewed by others
References
S.J. Zinkle, Fus. Eng. Des. 74, 31 (2005)
A.M. Dvoriashin et al., J. Nucl. Mat. 367–370, 92 (2007)
S.I. Porollo et al., J. Nucl. Mat. 329–333, 314 (2004)
Jinsuo Zhang, Ning Li, J. Nucl. Mat. 373, 351 (2008)
Molybdenum, edited by G.D. Considine (Wiley Interscience, New York, 2005), p. 1038
A. Gil et al., Surf. Coat. Technol. 201, 3824 (2006)
V.I. Tereshin et al., Vacuum 73, 555 (2004)
V.V. Uglov et al., Vacuum 81, 1341 (2007)
J. Langner et al., Surf. Coat. Technol. 128–129, 105 (2000)
I.E. Garkusha et al., Vacuum 58, 195 (2000)
V.I. Tereshin et al., Rev. Sci. Instrum. 73, 831 (2002)
V.I. Tereshin et al., Vacuum 80, 1272 (2006)
G. Muller et al., Surf. Coat. Technol. 108–109, 43 (1998)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Makhlay, V., Garkusha, I., Bandura, A. et al. Features of materials alloying under exposures to pulsed plasma streams. Eur. Phys. J. D 54, 185–188 (2009). https://doi.org/10.1140/epjd/e2009-00154-1
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjd/e2009-00154-1