Effect of Ductile Agents on the Dynamic Behavior of SiC 3D Network Composites
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Effect of Ductile Agents on the Dynamic Behavior of SiC3D Network Composites Jingbo Zhu 1 & Yangwei Wang 1 & Fuchi Wang 1 & Qunbo Fan 1
Received: 17 April 2016 / Accepted: 10 May 2016 / Published online: 1 July 2016 # Springer Science+Business Media Dordrecht 2016
Abstract Co-continuous SiC ceramic composites using pure aluminum, epoxy, and polyurethane (PU) as ductile agents were developed. The dynamic mechanical behavior and failure mechanisms were investigated experimentally using the split Hopkinson pressure bar (SHPB) method and computationally by finite element (FE) simulations. The results show that the SiC3D/Al composite has the best overall performance in comparison with SiC3D/epoxy and SiC3D/PU composites. FE simulations are generally consistent with experimental data. These simulations provide valuable help in predicting mechanical strength and in interpreting the experimental results and failure mechanisms. They may be combined with micrographs for fracture characterizations of the composites. We found that interactions between the SiC phase and ductile agents under dynamic compression in the SHPB method are complex, and that interfacial condition is an important parameter that determines the mechanical response of SiC3D composites with a characteristic interlocking structure during dynamic compression. However, the effect of the mechanical properties of ductile agents on dynamic behavior of the composites is a second consideration in the production of the composites. Keywords SiC3D composites . Ductile agents . Dynamic compaction . Finite element analysis
1 Introduction Three-dimensional (3D) co-continuous ceramic composites, also known as interpenetrating composites (IPCs), are composed of two interconnected continuous networks, one of which is a ductile agent and the other a ceramic phase. The main advantage of these composites is the synergistic effects of their components on some properties due to the contribute of the property
* Yangwei Wang [email protected]
1
National key Laboratory of Science and Technology on Materials under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
1016
Appl Compos Mater (2016) 23:1015–1026
of each phase to that of the composites [1–4]. In contrast to traditional discrete-phase reinforced composites based on ceramic particles or fiber, the tendency of the ceramic phase to segregate can be avoided in IPCs. Thus, they may have a very high content of the ceramic phase (up to 70 vol.% or more). Such a unique, three-dimensional interpenetrating and interlocking structure endows the composite with isotropic properties, stability, as well as uniform physical and mechanical behaviors [5–7]. Primary uses of these composites are in dental materials [8], automotive industry [9], and electronic packaging [10]. The composites also can retain some structural integrity at the macroscopy scale upon impact. Recently, such properties of IPCs have been found to be potentially suitable for military defense c
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