Structure and mechanical properties of He-implanted SiC

The changes in microstructure and mechanical properties of 4H-SiC implanted at room temperature with 50keV helium ions have been studied. Up to 1×1016cm−2, no significant change in mechanical properties is observed. Nevertheless, the as-created damage that induce a normal strain profile of few perce...

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Veröffentlicht in:	Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2008-06, Vol.266 (12-13), p.2776-2779
Hauptverfasser:	Tromas, C., Audurier, V., Leclerc, S., Beaufort, M.F., Declémy, A., Barbot, J.F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Implantation Mechanical properties Nanoindentation Silicon carbide
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container_title	Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms
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creator	Tromas, C. Audurier, V. Leclerc, S. Beaufort, M.F. Declémy, A. Barbot, J.F.
description	The changes in microstructure and mechanical properties of 4H-SiC implanted at room temperature with 50keV helium ions have been studied. Up to 1×1016cm−2, no significant change in mechanical properties is observed. Nevertheless, the as-created damage that induce a normal strain profile of few percents, enhance the dislocation nucleation. The compressive in-plane stress impedes the crack formation. At medium fluences, when a buried amorphous layer is created, the hardness curve against penetration depth can be divided into three stages showing “constraining coating” effects. Indents are surrounded by large hillocks resulting from the flowing of the amorphous state. When the entire part of the implanted crystal is amorphous a large decrease is measured for both the hardness and elastic modulus.
doi_str_mv	10.1016/j.nimb.2008.03.115
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subjects	Implantation Mechanical properties Nanoindentation Silicon carbide
title	Structure and mechanical properties of He-implanted SiC
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