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Mr. Yermal Shriraj Rao https://orcid.org/0000-0003-3653-6977 Dr. B. Shivamurthy Dr. Nanjangud Subbarao Mohan Dr. Nagaraja Shetty

Abstract

Hexagonal boron nitride (hBN) and molybdenum disulfide (MoS2) fillers of 2 to 8 wt.% influence on toughness, microhardness and thermal stability of carbon fabric-reinforced epoxy composite (CFREC) reported. Mode-I, mixed-mode I/II toughness and microhardness of CFREC improved due to the addition of hBN and MoS2 separately upto 6 wt.% filler loading. The epoxy matrix in CFREC modified by hBN and MoS2 strengthens the matrix, deflects the crack path and resists delamination. Toughness reduced beyond 6 wt.% filler addition due to agglomeration and poor fiber-filler-matrix bonding as revealed by the surface morphology of the fracture specimen. Thermal analysis reveals decomposition temperature at 25% weight loss increased from 395 to 430 °C and 395 to 411 °C due to 4 wt.% MoS2 and 4 wt.% hBN addition to CFREC respectively. Impermeable characteristics of MoS2 and hBN fillers caused tortuous diffusion path for gas molecules and delayed thermal decomposition.

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    Section
    Fracture

    How to Cite

    Rao, Y. S., Basavannadevaru, S., Subbarao, N. M., & Shetty, N. (2022). Influence of hBN and MoS2 fillers on toughness and thermal stability of carbon fabric-epoxy composites. Frattura Ed Integrità Strutturale, 16(62), 240–260. https://doi.org/10.3221/IGF-ESIS.62.17