National Institute of Foundry & Forge Technology

Al matrix composites are the most promising candidate for light-weight components in the aerospace and automotive industries. Graphene has numerous applications across various fields due to its exceptional mechanical, electrical, and thermal properties. The incorporation of graphene into aluminium (Al) matrix composites shows significantly improved mechanical and physical properties compared with pure Al. This review article summarizes the properties and applications of graphene in various areas. This article covers the processing route and effect of different fractions of graphene in aluminium matrix. Moreover, the article evaluates the advancement in mechanical and microstructural properties in Al/graphene composites with various fractions of graphene content.

Aluminum fumarate (AlFu) metal-organic framework (MOF) shows high fluoride adsorption from water, compared to other MOFs (Zr-MOFs, fumaric acid based MOFs), alumina-based porous materials, hydrated cement, waste mud etc.However, the nano-sized AlFu MOF tends to agglomerate in water.Thus, it reduces the fluoride removal efficiency of the MOF.Further, the exhausted MOF is difficult to regenerate and reuse.The present study prepared polymer matrix composite (PMC) to resolve it using an integrated chitosan mix coated on top of nanofiber (polyvinyl alc.) support.Some of the PMC studied includes Ca-Zr @ polyvinyl alc. (PVA), Fe-Al-Mn nanoparticles @ chitosan, and monetite bundles @ chitosan.AlFu MOF based PMC (9 g) was packed in a pouch-like tea bag and dipped in groundwater (1 L) with 10-30 mg fluoride/L.After 100 ± 10 min, the fluoride concentration was reduced to 1-1.5 mg/L.The exhausted PMC pouch could be regenerated by dipping it in 100 mL of treated water, tap water or deionized water for 5 h resp.The same process was repeated ten times in fresh groundwater.Thus, PMC pouch could be used in our daily life.

In this work, Ti and Gd co-doped Bi2VO5.5 compounds have been reported.The structural anal. reveals suppression of phase transition in the co-doped system.The conductivity plots of Bi₂V₁-xTix/₂Gdx/₂O₅.₅-δ (0 ≤ x ≤ 0.225) carry two distinct segments: Below and above ∼ 425°C.Below this temperature, the ionic conductivity is higher for all the doped compounds than the parent specimen Bi₂VO₅.₅, with the highest value of conductivity for x = 0.175.At higher temperatures, though, conductivity is lower than the parent compound for all the specimens.The enhancement observed in the conductivity is explained by structural and Raman spectra anal. and is corroborated with the electrochem. impedance anal.