Plasma and Fusion Research
Volume 13, 3406074 (2018)
Regular Articles
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
- 1)
- Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan
Abstract
Fuzz nanostructure formation on metal by helium plasma irradiation has potential in industrial application due to the increasing in surface area. We have investigated the influence on the surfaces of platinum and tungsten carbide by helium plasma irradiation. On tungsten carbide, fuzz nanostructure was formed when the surface temperature was higher than 1000 K. However, when helium irradiation was conducted at the surface temperature of 940 K or higher, tungsten carbide changed to W possibly because of radiation enhanced sublimation. On platinum, fuzz nanostructure was formed when the surface temperature was in the range of 800 - 1000 K and the fluence was on the order of 1026 m−2. The nanostructure formation mechanism of platinum should be similar to that of tungsten, but incubation fluence of platinum was higher and the growth rate of fuzzy layer was likely to be lower than those of tungsten.
Keywords
Helium, fuzz, platinum, tungsten carbide, nanostructure
Full Text
References
- [1] S. Kajita et al., Nucl. Fusion 49, 095005 (2009).
- [2] S. Kajita et al., Appl. Surf. Sci. 303, 438 (2014).
- [3] S. Kajita et al., Scientific Reports 6, 30380 (2016).
- [4] J.K. Tripathi et al., Appl. Surf. Sci. 378, 63 (2016).
- [5] S. Kajita et al., J. Appl. Phys. 113, 134301 (2013).
- [6] M. de Respinis et al., ACS Appl. Mater. Interface 5, 7621 (2013).
- [7] H. Igarashi et al., J. Electroanal. Chem. 391, 119 (1995).
- [8] F. Kapteijn et al., Catal. Today 16, 273 (1993).
- [9] C. Wang et al., ACS Appl. Mater. Interface 2, 3373 (2010).
- [10] R.B. Lavy and M. Boudart, Science 181, 547 (1973).
- [11] R.J. Colton et al., Chem. Phys. Lett. 34, 2, 337 (1975).
- [12] V. Philipps et al., J. Nucl. Mater. 179-181, 25 (1989).
- [13] R.E. Nygren et al., J. Nucl. Mater. 176&177, 445 (1990).
- [14] J. Roth and W. Möller, Nucl. Instrum. Methods Phys. Res. B 7/8, 788 (1985).
- [15] S. Kajita et al., J. Nucl. Mater. 418, 152 (2011).
- [16] M. Yajima et al., J. Nucl. Mater. 449, 9 (2014).
- [17] A. Lasa et al., Nucl. Instrum. Methods Phys. Res. B, 303, 156 (2013).
- [18] T.J. Petty et al., Nucl. Fusion 55, 093033 (2015).