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Phenolic resin; nanometric silicon carbide; nanocomposites; friction coefficient.

This paper presents a preliminary study on obtaining and characterization of phenolic resin-based composites modified with nanometric silicon carbide. The nanocomposites were prepared by incorporating nanometric silicon carbide (nSiC) into phenolic resin at 0.5, 1 and 2 wt% contents using ultrasonication to ensure uniform dispersion of the nanopowder, followed by heat curing of the phenolic-based materials at controlled temperature profile up to 120$^{\circ}$C. The obtained nanocomposites were characterized by FTIR spectroscopy and scanning electron microscopy analysis and evaluated in terms of mechanical, tribological and thermal stability under load. The results highlight the positive effect of the nanometric silicon carbide addition in phenolic resin on mechanical, thermo-mechanical and tribological performance, improving their strength, stiffness and abrasive properties. The best results were obtained for 1 wt% nSiC, proving that this value is the optimum nanometric silicon carbide content. The results indicate that these materials could be effectively used to obtain ablative or carbon–carbon composites in future studies.

GEORGE PELIN^{1 2} CRISTINA-ELISABETA PELIN^{1 2} ADRIANA STEFAN¹ ION DINC\u{A}¹ ANTON FICAI² ECATERINA ANDRONESCU² ROXANA TRUSC\u{A}³

1. National Institute for Aerospace Research and Development ‘Elie Carafoli’, Materials Unit, 220 Iuliu Maniu Blvd, 061126 Bucharest, Romania
2. Politehnica University of Bucharest, Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, 1-7 Gh. Polizu St., 011061 Bucharest, Romania
3. S.C. METAV Research & Development S.A., 31 C.A. Rosetti St., 020011 Bucharest, Romania

Manuscript received

18 August 2015

Accepted

8 November 2015