In-situ polymer-derived SiOC strengthened aluminum sheets: Investigations on its manufacturing and structure-property correlations

Pariyar, A and Perugu, CS and Abhishek, BM and Toth, LS and Kailas, SV (2023) In-situ polymer-derived SiOC strengthened aluminum sheets: Investigations on its manufacturing and structure-property correlations. In: Materialia, 30 .

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Abstract

Ceramic nanoparticles are used to strengthen metals/alloys but their agglomeration within the matrix, weak particle-matrix interface, and high cost are concerning issues. Polymer-derived ceramics could overcome these problems. Pyrolyzed SiOC was obtained from poly(methylhydrosiloxane) (PMHS) in-situ within an Al matrix. Before pyrolysis, PMHS was fragmented and distributed in the nano and sub-micron scale by accumulative roll bonding (ARB). In the mid-section/central region of the composite along the thickness, a multimodal grain size distribution with a combination of large elongated and fine equiaxed grains (recrystallized grains) was observed. However, near the surface, only the latter was present. The PDC-containing specimen exhibited an improvement in strength by ∼ 8.5 times compared to the parent material. Whereas, the improvement compared to a similarly processed specimen but without the polymer-derived SiOC particles was by ∼ 6 times. Fractography revealed ductile fracture with sheet debonding in the composite.

Item Type:	Journal Article
Publication:	Materialia
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	Composite; Mechanical properties; Microstructure; Nanoparticles; Polymer-derived ceramic
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	01 Aug 2023 05:10
Last Modified:	01 Aug 2023 05:10
URI:	https://eprints.iisc.ac.in/id/eprint/82721

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