Electrical properties of hollow glass particle filled vinyl ester matrix syntactic foams

2013 ◽  
Vol 49 (1) ◽  
pp. 180-190 ◽  
Author(s):  
Vasanth Chakravarthy Shunmugasamy ◽  
Dinesh Pinisetty ◽  
Nikhil Gupta
2012 ◽  
Vol 47 (14) ◽  
pp. 5596-5604 ◽  
Author(s):  
Vasanth Chakravarthy Shunmugasamy ◽  
Dinesh Pinisetty ◽  
Nikhil Gupta

2020 ◽  
Vol 8 (5) ◽  
pp. 2147-2155

Syntactic foams are porous particulate composites fabricated by mixing hollow particles called micro-balloons into a matrix material such as metal, polymer, ceramic etc. Fillers i.e. micro balloons are used to decrease the amount of expensive matrix material and/or to enhance or tailor some properties of matrix materials. The different variations in density and properties of syntactic foam could be obtained by changing the material, volume fraction and/ or density of micro balloons. Here the hybrid syntactic foams were synthesized by adding two different filler materials that are hollow glass microballoons and flyash cenospheres into vinyl ester matrix. Two types of hybrid systems are created one with 50% total filler content and another with 60% total filler content in a matrix whereas, within these hybrid systems an internal composition of two fillers were varied in a step of 25 vol% with respect to each other. Hybridization of two different types of ceramic microballoons in vinyl ester matrix gives maximum 111% increase in impact strength with respect to plane hollow glass microsphere syntactic foam. Hybridization also causes lncrease in flexural strength and Flexural modulus by 39% and 58% respectively.


2016 ◽  
Vol 95 ◽  
pp. 32-38 ◽  
Author(s):  
Haitao Geng ◽  
Jiachen Liu ◽  
Anran Guo ◽  
Sue Ren ◽  
Xiqing Xu ◽  
...  

Fuel ◽  
2014 ◽  
Vol 121 ◽  
pp. 240-249 ◽  
Author(s):  
Matthew Labella ◽  
Steven E. Zeltmann ◽  
Vasanth Chakravarthy Shunmugasamy ◽  
Nikhil Gupta ◽  
Pradeep K. Rohatgi

2010 ◽  
Vol 29-32 ◽  
pp. 607-612 ◽  
Author(s):  
Chang Jun He ◽  
Hui Jian Li ◽  
Wei Yu ◽  
Xi Liang ◽  
Hai Yan Peng

. The Young’s modulus of syntactic foams were studied both the experiment and the theory. The compressive test and dynamic mechanical analysis were progressed for a few of specimens, which were made of the syntactic foams with the epoxy resin and hollow glass microspheres (HGMs). the equations for Young’s modulus of concentrated particulate composites were derived using a differential scheme of an infinitely dilute system, and were employed to prediction the Young’s modulus of syntactic foams. The computed effective Young’s moduli were compared with the experimental results, the prediction values were between the lower and upper bounds of the experimental data, and the prediction model was acceptable and can estimate the Young’s modulus of syntactic foams.


Author(s):  
Pravin R. Kubade ◽  
Amol N. Patil ◽  
Hrushikesh B. Kulkarni

Syntactic foam is the porous composite produced by mixing prefabricated hollow spherical particle into the matrix. Syntactic foams are used as energy absorption sandwich core for several applications like marine, automotive, and aerospace. In this work, low density hollow glass microspheres are hybridized with fly ash cenosphere in Bisphenol-A epoxy-based vinyl ester matrix. Hybrid syntactic foams is created with 60% total filler content. Within these hybrid systems internal composition of two fillers were varied in a step of 25 vol% with respect to each other. Hybrid syntactic foams are prepared by the hand lay-up (molding) method. The physical characterization parameter contains density and matrix porosity whereas tensile, quasi-static compression, flexural (3-point bending), Izod impact, and micro Vickers hardness are grouped as mechanical characterization parameters. Scanning electron microscopy was performed on fractured surfaces to examine deformation and fracture mechanisms related with each loading condition.


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