Mazumder, Subhrojyoti and Metselaar, Hendrik Simon Cornelis and Sukiman, Nazatul Liana and Zulkifli, Nurin Wahidah Mohd (2023) Friction and wear behavior of fluoride added Si3N4-SiC ceramic composites at elevated temperature. Ceramics International, 49 (8). pp. 12787-12795. ISSN 0272-8842, DOI https://doi.org/10.1016/j.ceramint.2022.12.144.
Full text not available from this repository.Abstract
The addition of fluoride phases often provides promising wear resistance characteristics in ceramic matrix composites at elevated temperatures. In this work, MgF2 added Si3N4-SiC nanowire composite is successfully fabricated to enhance wear resistance capabilities at 500OC. Tribological characteristics of Si3N4-SiC composite with the addition of fluoride phase are reported here. The composite matrix with 5 wt.% MgF2 shows a signif-icant decrease in coefficient of friction by-25.40% and an improvement of specific wear rate by-78.35%, by providing a tribo layer at the mating interfaces. Moreover, the composite can achieve a high fracture toughness of-10.56 MPa.m0.5 with the addition of SiC nanowires. However, the addition of a higher amount of (>5 wt.%) fluoride diminishes the mechanical properties of the ceramic composite. This leads to a change of wear mech-anism from delamination to abrasion, causing a higher wear rate.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya , Malaysia [Grant No: GPF061A-2020], Ministry of Higher Education, Malaysia [Grant No: FRGS/1/2020/TK0/UM/02/12] |
| Uncontrolled Keywords: | Silicon nitride; Silicon carbide nanowire; Fluoride additive; Tribochemical layer; High temperature; Wear resistance |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 10 Nov 2024 04:40 |
| Last Modified: | 10 Nov 2024 04:40 |
| URI: | http://eprints.um.edu.my/id/eprint/38457 |
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