Comparison of weight-loss changes with different compositions of ZrB2 nanoparticles in carbon fabric–novolac composite at high temperature
- Author(s): Zahra Amirsardari 1 and Rouhollah Mehdinavaz Aghdam 2
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View affiliations
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Affiliations:
1:
Department of Nanotechnology , Space Transportation Research Institute, Iranian Space Research Center , Tehran , Iran ;
2: School of Metallurgy and Materials Engineering , College of Engineering, Tehran University , Tehran , Iran
-
Affiliations:
1:
Department of Nanotechnology , Space Transportation Research Institute, Iranian Space Research Center , Tehran , Iran ;
- Source:
Volume 12, Issue 9,
September
2017,
p.
589 – 594
DOI: 10.1049/mnl.2017.0071 , Online ISSN 1750-0443
© The Institution of Engineering and Technology
Received
12/02/2017,
Accepted
16/03/2017,
Revised
14/03/2017,
Published
01/09/2017
To improve the thermal properties of novolac resin, zirconium diboride (ZrB2) nanoparticles (ZNP) with different weight percentages (0, 2, 4 and 7) were introduced into novolac resin. ZrB2 nanoparticles modified carbon–novolac (C–N) composites were used to determine and compare the ablation performance, thermal stresses and cracks, and mechanical properties of these modified polymer composites. Thermal protection via ablation was achieved through a self-regulating heat and mass transfer process involving an insulator with low thermal conductivity and concomitant formation of a hard char on the insulator surface after 160 s exposure to the combustion environment. Anti-oxidation mechanisms for the novolac resin modified with nanoparticles at different weight percentage were compared and discussed. Ablation performance shows a steady increase with the filler content until a maximum, at 4 wt% of ZNP, and then it decreases.
Inspec keywords: zirconium compounds; high-temperature effects; heat transfer; thermal conductivity; filled polymers; combustion; nanoparticles; nanocomposites; carbon fibres; nanofabrication; particle reinforced composites; cracks; oxidation; thermal stresses; mass transfer; fabrics; resins
Other keywords: weight-loss changes; ZrB2-C; combustion environment; mass transfer; cracks; ablation performance; zirconium diboride nanoparticles; self-regulating heat transfer; mechanical properties; time 160 s; thermal protection; thermal conductivity; thermal stresses; hard char; high temperature regime; modified polymer composites; modified carbon fabric-novolac resin composite; antioxidation mechanisms; insulator surface
Subjects: Fatigue, brittleness, fracture, and cracks; Nonelectronic thermal conduction and heat-pulse propagation in nonmetallic solids; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Other methods of nanofabrication; Flames, combustion, and explosions; Fatigue, embrittlement, and fracture; Surface treatment and degradation of composites; Preparation of reinforced polymers and polymer-based composites
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