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Abstract

The time dependent gas-phase isovolumetric desorption technique has been used over a temperature range of 675 to 1029 K and driving pressures ranging from 1.3.10(E4) to 10(E5) Pa, to obtain the deuterium transport parameters diffusivity (D), and solubility (S) in a 3-D SiCf/SiC composite. Two theoretical models have been applied in order to simulate the experiment; a model corresponding to a homogeneous material and a model corresponding to a heterogeneous material wherein two phases (matrix and fibre) are distinguished. The homogeneous model evaluates the following parameters:

(m(E2)s(E-1))=1.131.10(E-4)exp( -107700/RT).
S(mol m(E-3))=1.949.10(E3) exp(-30165/RT).

These are engineering parameters for evaluating effective gas inventory retention and permeation in SiCf/SiC structures.

Additional information

Authors: ESTEBAN G.A, JRC-Environment Institute Renewable Energies Unit, Ispra (IT);PERUJO A, JRC-Environment Institute Renewable Energies Unit, Ispra (IT);DOUGLAS K, JRC-Environment Institute Renewable Energies Unit, Ispra (IT)
Bibliographic Reference: EUR: 19751 EN (2001), pp29 Euro: FREE of charge
Availability: Available from the Documentation Service JRC Ispra (IT) Fax: +39-0332-785818 url: http://www.europa.eu
ISBN: ISBN: N/A
Record Number: 200013232 / Last updated on: 2001-06-12
Category: PUBLICATION
Original language: en
Available languages: en