1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Nanostructuring of molybdenum and tungsten surfaces by low-energy helium ions
Rent:
Rent this article for
USD
10.1116/1.4731196
/content/avs/journal/jvsta/30/4/10.1116/1.4731196
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/30/4/10.1116/1.4731196
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Typical electron temperature ( ) and density ( ) profiles of the helium plasmas used during the experiments. The FWHM of the plasma beam is typically 1 cm.

Image of FIG. 2.
FIG. 2.

(Color online) Evolution of the surface temperature and emissivity of (a) tungsten and (b) molybdenum surfaces exposed to high flux helium plasmas ( ) with  = 45 eV.

Image of FIG. 3.
FIG. 3.

Surface morphology of molybdenum surfaces induced by helium plasma exposure for a duration of 500 s, with a surface temperature of 1000 °C as a function of the impinging ion energy.

Image of FIG. 4.
FIG. 4.

Surface morphology of tungsten surfaces induced by helium plasma exposure for a duration of 500 s, with a surface temperature of 1000 °C as a function of the impinging ion energy.

Image of FIG. 5.
FIG. 5.

Scanning electron microscope images of tungsten surface after exposure to a helium fluence of (500 s) with a surface temperature of 1400 °C, with [(a) and (b) with a tilt of 45°] and [(c) and (d) cross-section images].

Image of FIG. 6.
FIG. 6.

Evolution of the helium-induced surface morphology changes of molybdenum surfaces as a function of the surface temperature during plasma exposure (  = 45 eV, t = 1000 s). For each exposure temperature, top-views (tilted by 52°) and cross-sections are shown in the same magnification on the left and right sides, respectively. The dashed line in (d) indicates the boundary between the plasma-modified layer and the unaffected bulk.

Image of FIG. 7.
FIG. 7.

(Color online) Evolution of the thickness of the plasma-modified sub-surface region as a function of the surface temperature during exposure for molybdenum surfaces. The ion energy was 45 eV, the ion fluence was (500 s) and (1000 s).

Image of FIG. 8.
FIG. 8.

Evolution of the helium-induced surface morphology changes of tungsten surfaces as a function of the surface temperature during plasma exposure (  = 45 eV). For each temperature, top-views and cross-sections are shown on the left and right sides, respectively. The exposure duration was 1000 s for the samples prepared at 1500 °C and 2000 °C, and 500 s for the sample prepared at 1000 °C.

Image of FIG. 9.
FIG. 9.

(Color online) Evolution of the thickness of the nanostructured region as a function of exposure time for tungsten surfaces, with  = 45 eV.

Image of FIG. 10.
FIG. 10.

Transmission electron microscope images of tungsten filaments formed on a tungsten surface during helium plasma exposure. The surface was exposed at 1000 °C for 500 s with  = 45 eV. (a) and (b) are images of the same area with different magnifications.

Image of FIG. 11.
FIG. 11.

Electron diffraction pattern of the tungsten filaments with hkl identification.

Loading

Article metrics loading...

/content/avs/journal/jvsta/30/4/10.1116/1.4731196
2012-06-27
2014-04-16
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanostructuring of molybdenum and tungsten surfaces by low-energy helium ions
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/30/4/10.1116/1.4731196
10.1116/1.4731196
SEARCH_EXPAND_ITEM