Vasireddi, Ramakrishna and Mahapatra, Roy D (2018) Micro-crack Pinning and Interfacial Fracture in Mixed Metal Oxide Reinforced Epoxy Nanocomposite. In: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 27 (11). pp. 5938-5946.
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Abstract
The effects of mixed metal oxides (CexZr1-xO2) nanoparticle dispersion on the mechanical properties and fracture mechanisms of epoxy polymer matrix and its composite with glass fiber system are reported in this paper. CexZr1-xO2 nanoparticles are synthesized using sol-gel method, and its crystallinity is optimized. Epoxy nanocomposites are synthesized by a dispersion technique, and the compressive properties are optimized. The glass transition temperature has been improved. Epoxy with 5wt.% of Ce0.75Zr0.25O2 shows optimal results with an increase of 17.4% in compressive modulus, and an increase of 23.4% in compressive strength with respect to those of neat epoxy. This improvement attributes to higher strength of shearing of polymer during the fracture of the nanoparticle interface. Micro-crack kinks at the interfaces can further delay fracture under compression. E-glass fabric-reinforced 5wt.% Ce0.75Zr0.25O2-epoxy nanocomposite also shows improvement in the mechanical properties via nanoscale interface with fibers. This type of ceramic nanocomposites has useful applications in thermal/electrical insulations besides improving the compressive/buckling properties.
| Item Type: | Journal Article |
|---|---|
| Publication: | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE |
| Publisher: | SPRINGER |
| Additional Information: | Copyright of this article belong to SPRINGER |
| Keywords: | ceramic; glass fabric; interface fracture; micro-crack; nanoparticles; nanocomposite; oxide; zirconia |
| Department/Centre: | Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) |
| Date Deposited: | 19 Dec 2018 16:56 |
| Last Modified: | 19 Dec 2018 16:56 |
| URI: | http://eprints.iisc.ac.in/id/eprint/61243 |
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