Issue 62

Y. S. Rao et alii, Frattura ed Integrità Strutturale, 62 (2022) 240-260; DOI: 10.3221/IGF-ESIS.62.17

reveals that the MoS 2 resemble thin sheets with folded edges (Fig. 2(f-h)) and the lateral size is 144-642 nm. Interlayer distance is 0.3 nm corresponds to the (101) lattice plane as shown in Fig. 2(i) [59]. The darker surface in Fig. 2(f-g) indicates overlapping of thin nanosheets. The selective area electron diffraction (SAED) images reveal both fillers of polycrystalline nature. The d-spacings of hBN and MoS 2 filler materials are estimated from the diameter (D) and radius (R) with respect to central spot of SAED images as shown in Fig. 2(e) and 2(j) respectively. The D and R are measured on images using Image J software. Further, Miller indices values (hkl) were identified by comparing the d-spacing with the Joint committee on powder diffraction standard (JCPDS) value of hBN (card no. 34-0421) and MoS 2 (card no. 89-5112) respectively and are shown in Tab. 3.

Figure 2: HRTEM images (a-d) hBN morphology, (e) hBN SAED pattern, (f-i) MoS 2 morphology and (j) MoS 2 SAED pattern.

Fabrication of composite laminates Eight composite laminates were fabricated by using hBN and MoS 2 fillers of 2, 4, 6, and 8 wt.% and carbon fabric as reinforcement in an epoxy matrix. Also, a carbon fabric-reinforced epoxy laminate without filler was fabricated as a control. The constituents of the composites are mentioned in Tab. 4. The pre-determined quantity of filler dispersed in the known quantity of epoxy matrix by magnetic stirring (Make/Model: Remi 5MLH, India) at 500 rpm and temperature of 70 °C.

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