Results 271 to 280 of about 117,477 (313)

Nanoindentation on ion irradiated steels

Journal of Nuclear Materials, 2009
Radiation induced mechanical property changes can cause major difficulties in designing systems operating in a radiation environment. Investigating these mechanical property changes in an irradiation environment is a costly and time consuming activity.
P. Hosemann, C. Vieh, R.R. Greco, S. Kabra, J.A. Valdez, M.J. Cappiello, S.A. Maloy   +6 more
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Challenges to the use of ion irradiation for emulating reactor irradiation

Journal of Materials Research, 2015
Abstract
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Ion beam irradiation of polymers

AIP Conference Proceedings, 1996
Mylar and kapton films were irradiated with H+ (2.5 Mev) or C4+ (12.5 Mev) beams, at doses up to 1.99×1016 H+/cm2 and 2.48×1015 C4+/cm2. Analysis of scattered projectiles simultaneously to irradiation has allowed discerning and following several changes undergone by the films, such as loss of elements, density changes, compaction and movement of ...
Saúl Romero H., Ghiraldo Murillo O., Rafael Policroniades R., Marco Fernández B., Jorge Fernández A., Octavio Alvarez F.   +5 more
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Fullerene ion irradiation to silicon

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Abstract Silicon has been irradiated by singly charged C60 fullerene ions with an ion dose of up to 1 × 1013 ions/cm2 at room temperature in order to study the damage formation of cluster ion bombardment on solid surfaces. Singly and doubly charged fullerene ions and some daughter ions of fullerene were observed. Mass separation was accomplished by a
M. Tanomura, D. Takeuchi, J. Matsuo, G.H. Takaoka, I. Yamada   +4 more
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Ion irradiation of astrophysical ices

Planetary and Space Science, 1995
We report recent experimental studies on the physical—chemical effects induced by fast ions colliding with frozen gases (CO. CH3OH, CH4, CO2) and mixtures with water simulating icy targets in space (frosts on external planets and satellites. comets and interstellar ices). We have studied, by lR spectroscopy, the formation of new molecules.
G. Strazzulla, A.C. Castorina, M.E. Palumbo   +2 more
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Ion Irradiation of Ternary Pyrochlores

MRS Proceedings, 2008
AbstractSynthetic pyrochlore samples Y2Ti2-xSnxO7 (x=0.4, 0.8, 1.2, 1.6), Nd2Zr2O7, Nd2Zr1.2Ti0.8O7, and La1.6Y0.4Hf2O7, were irradiated in-situ using the IVEM-TANDEM microscope facility at the Argonne National Laboratory. The critical temperatures for amorphisation have revealed a dramatic increase in tolerance with increasing Sn content for the Y2Ti2-
Karl R. Whittle, Katherine L. Smith, Mark G. Blackford, Simon A.T. Redfern, Elizabeth J. Harvey, Nestor J. Zaluzec, Gregory R. Lumpkin   +6 more
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Erosion of ices by ion irradiation

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1987
We have studied the erosion rates of icy films under irradiation by a wide variety of ion beams, from H to Kr, and energies from 1 keV to 100 MeV. The films are prepared by condensation of vapors (H 2 O, CO 2 , NH 3 and mixtures) onto KBr substrates maintained at liquid nitrogen temperature.
Benit, J., Bibring, J.P., Della Negra, S., Le Beyec, Y., Mendenhall, M., Rocard, F., Standing, K.   +6 more
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Ion irradiation of carbon fibres

12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103), 2002
The aim of the present work is to study changes of surface and volume physico-chemical properties of carbon fibres after ion irradiation. Ion irradiation of a foreign species can lead to the production of new compounds in near-surface layers of carbon fibre, but the displacement damage caused by energetic ions also lead to structural transitions of the
N.V. Gavrilov, D.R. Emlin, A.E. Ligachev, G.A. Mesyats, S. Ligacheva, A. Galyaeva   +5 more
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Ion irradiation of polymethylmetacrylate (PMMA)

Radiation Effects and Defects in Solids, 1998
Abstract Radiation damage of polymethylmetacrylate (PMMA) is investigated irradiating thin films with 100–300 keV helium beams. The damage is deduced by measuring in situ the molecular ejection from the irradiated polymer with a quadrupole mass spectrometer.
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Unique Effects of Ion Irradiation

2016
This chapter will focus on processes that are unique to ion bombardment of metals and alloys. Ion bombardment is important in fusion reactor systems in which the reaction products consist of energetic helium and hydrogen (deuterium or tritium) ions that impact the first wall and other components.
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