Helium behavior in $\alpha$-SiC ceramics investigated by NRA technique - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Year : 2007

Helium behavior in $\alpha$-SiC ceramics investigated by NRA technique

Abstract

The mechanisms involved in helium migration in α-SiC are investigated through the evolution of its microstructure and of the concentration profiles following annealing at 1300 °C/30 min for fluences of 1 and 5 × 1015 3He cm−2 and a He implantation energy of 500 keV. Helium profiling is performed using the 3He(d,α)1H NRA technique with an improved detection limit of 5 at ppm. The NRA and TEM techniques clearly show that depending on the initial fluence, a proportion of the helium is trapped within the grain and a part of the helium is released. Analysis of the helium profile changes after annealing enabled to determine a value of the volume diffusion coefficient close to (8 ± 1) × 10−17 m2 s−1 for both fluences studied.

Dates and versions

in2p3-00169581 , version 1 (04-09-2007)

Identifiers

Cite

T. Sauvage, G. Carlot, G. Martin, L. Vincent, P. Garcia, et al.. Helium behavior in $\alpha$-SiC ceramics investigated by NRA technique. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007, 257, pp.231-235. ⟨10.1016/j.nimb.2007.01.006⟩. ⟨in2p3-00169581⟩
24 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More