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Indexed by:期刊论文

Date of Publication:2014-10-01

Journal:NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

Included Journals:SCIE、EI、Scopus

Volume:336

Page Number:158-162

ISSN No.:0168-583X

Key Words:Carbon fiber/bismaleimide composite; Electron irradiation; Dynamic mechanical analysis (DMA); Thermogravimetric analysis (TGA); Mechanical properties

Abstract:The effects of electron irradiation in simulated space environment on thermal and mechanical properties of high performance carbon fiber/bismaleimide composites were investigated. The dynamic mechanical properties of the composites exposed to different fluences of electron irradiation were evaluated by Dynamic mechanical analysis (DMA). Thermogravimetric analysis was applied to investigate the changes in thermal stability of the resin matrix after exposure to electron irradiation. The changes in mechanical properties of the composites were evaluated by flexural strength and interlaminar shear strength (ILSS). The results indicated that electron irradiation in high vacuum had an impact on thermal and mechanical properties of CF/BMI composites, which depends on irradiation fluence. At lower irradiation fluences less than 5 x 10(15) cm(-2), the dynamic storage modulus, cross-linking degree, thermal stability and mechanical properties that were determined by a competing effect between chain scission and cross-linking process, decreased firstly and then increased. While at higher fluences beyond 5 x 10(15) cm(-2), the chain scission process was dominant and thus led to the degradation in thermal and mechanical properties of the composites. (C) 2014 Elsevier B.V. All rights reserved.