Microwave absorption and mechanical properties of cross-scale SiC composites. (15th December 2018)

• Record Type: Journal Article
• Authors: Wu, Qiong; Gao, Hanjun; Zhang, Yidu; Shui, Weijia
• Is Part Of: Composites. Number 155(2018)
• Page Start: 83
• Page End: 91
• Publication Date: 2018-12-15
• Subjects: Cross-scale SiC composites -- Microwave absorption properties -- Mechanical properties -- Finite element analysis (FEA) -- Polymer-matrix composites (PCMs); Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2018.08.020
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: SiCp/PVDF composite films with cross-scale SiC particle sizes (40 nm and 5, 10, 14, and 28 μm) and five different mass fractions for each particle size (10%, 20%, 30%, 40%, and 50%) were prepared in the present study, and their characteristics, adsorption properties, and mechanical properties were investigated. FE models were also established to study the mechanical properties of the composites further. The results showed that: 1) the SiCp/PVDF composites have good absorption properties over a wide bandwidth, and reflection loss increases with decreasing particle size; 2) the elastic modulus ( E ) of the films first increases and then decreases with the SiC mass fraction; 3) E decreases with the particle size when the mass fraction ranges from 10% to 20% and first increases and then decreases with the particle size when the mass fraction ranges from 30% to 50%; and 4) the maximum E of the prepared composites is 933 MPa, which is 3.6 times that of conventional PVDF films. Graphical abstract: Image 1 Highlights: The characteristics, and adsorption and mechanical properties of the prepared SiCp/PVDF composites were investigated. FE models were established to study the mechanical properties. The SiCp/PVDF composites have good absorption properties over a wide bandwidth. The influences of SiC mass fraction and particle size on the mechanical properties were obtained. The maximum elastic modulus of the prepared composites is 933 MPa, which is 3.6 times that of conventional PVDF films.