Helium bubble bursting in tungsten

Journal Article · Sat Dec 28 00:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4860315· OSTI ID:22267761

Sefta, Faiza ^[1]; Juslin, Niklas ^[2]

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1. University of California, Berkeley, California 94720 (United States)
2. University of Tennessee, Knoxville, Tennessee 37996 (United States)

Molecular dynamics simulations have been used to systematically study the pressure evolution and bursting behavior of sub-surface helium bubbles and the resulting tungsten surface morphology. This study specifically investigates how bubble shape and size, temperature, tungsten surface orientation, and ligament thickness above the bubble influence bubble stability and surface evolution. The tungsten surface is roughened by a combination of adatom “islands,” craters, and pinholes. The present study provides insight into the mechanisms and conditions leading to various tungsten topology changes, which we believe are the initial stages of surface evolution leading to the formation of nanoscale fuzz.

• OSTI ID: 22267761
• Journal Information: Journal of Applied Physics, Vol. 114, Issue 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BUBBLES
CRATERS
HELIUM
MOLECULAR DYNAMICS METHOD
MORPHOLOGY
NANOSTRUCTURES
ORIENTATION
THICKNESS
TUNGSTEN