Fabrication and tribo characteristics of in-situ polymer-derived nano-ceramic composites of Al-Mg-Si alloy

Kumar, S and Divakaran, A and Kailas, SV (2023) Fabrication and tribo characteristics of in-situ polymer-derived nano-ceramic composites of Al-Mg-Si alloy. In: Tribology International, 180 .

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Abstract

Polymer-derived nano ceramic metal matrix composites (PDC-MMC) have potential as wear-resistant materials. PDC-MMC are obtained from preceramic polymers after pyrolysis. To develop in-situ PDC-MMC, ball-milled Polymethylhydrosiloxane polymer particles were dispersed in an industrial-grade Al-Mg-Si matrix by Friction Stir Processing (FSP). Tribological properties were evaluated at variable loads using a reciprocating ball-on-flat method. PDC-MMC showed 67.2 reduction in wear volume loss. Improved resistance to abrasion and delamination could be reasoned for excellent wear resistance. Under the severe plastic deformation during FSP, the uniform ceramic distribution resulted in compact bonding with the metal matrix and yielded better wear properties. The dominant wear mechanism of PDC-MMC changed from abrasive to adhesive. © 2023 Elsevier Ltd

Item Type:	Journal Article
Publication:	Tribology International
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Abrasion; Adhesives; Friction; Friction stir welding; Magnesium alloys; Metallic matrix composites; Silicon alloys; Tribology; Wear resistance, Ceramic composites; Ceramic-metal; Friction stir processing; Matrix composite; Metal matrix; Nano ceramics; Polymer derived nano ceramic metal matrix composite; Tribological properties; Wear resistant materials; Wear volume loss, Aluminum alloys
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	16 Feb 2023 04:22
Last Modified:	16 Feb 2023 04:22
URI:	https://eprints.iisc.ac.in/id/eprint/80291

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