Show simple item record

AuthorMatli, Penchal Reddy
AuthorUbaid, Fareeha
AuthorShakoor, Rana Abdul
AuthorParande, Gururaj
AuthorManakari, Vyasaraj
AuthorYusuf, Moinuddin
AuthorAmer Mohamed, Adel Mohamed
AuthorGupta, Manoj
Available date2022-10-05T07:23:07Z
Publication Date2017
Publication NameRSC Advances
ResourceScopus
URIhttp://dx.doi.org/10.1039/c7ra04148a
URIhttp://hdl.handle.net/10576/34846
AbstractIn this study, nano-sized Si3N4 (0, 0.5, 1.0 and 1.5 vol%)/Al composites were fabricated using a powder metallurgy method involving microwave sintering technique followed by hot extrusion. The influence of Si3N4 content on the structural, mechanical and thermal behaviour of Al–Si3N4 nanocomposites was systematically investigated. Electron microscopy examination reveals the uniform distribution of hard Si3N4 nanoparticles in the soft Al matrix. The compressive and tensile strengths of Al composites increased with the increase of Si3N4 content while the ductility decreased. The thermal expansion coefficient of the Al composite decreased with the progressive addition of hard Si3N4 nanoparticles. Overall, hot extruded Al–1.5 vol% Si3N4 nanocomposites exhibited the best combination of tensile, compressive, hardness, Young's modulus and thermal properties of 191 ± 4 MPa, 412 ± 3 MPa, 16.3 ± 0.8 GPa, 94 ± 2 GPa and 19.3 μ K−1, respectively. Tensile tests performed at 200 °C revealed that the tensile strength reduced by ∼35% when compared to the strength at room temperature. The strength, however, was still higher compared to that of the pure Al at 200 °C. The major enhancement in the strength of the nanocomposites is primarily attributed to the presence of uniformly distributed nano-sized Si3N4 nanoparticles in the Al matrix.
Languageen
PublisherRoyal Society of Chemistry
SubjectAl-Si3N4
nanocomposites
aluminum (Al)
TitleImproved properties of Al-Si3N4 nanocomposites fabricated through a microwave sintering and hot extrusion process
TypeArticle
Pagination34401-34410
Issue Number55
Volume Number7
dc.accessType Open Access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record