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Description:

The tribological properties are evaluated using several types of Mg/SiC composites, which SiC powders with particle sizes of 20~30 nm, 130 nm and 2~3 μm are dispersed in up to 25 % by volume fraction. Sound and bulky Mg/SiC composites are successfully fabricated by powder-metallurgy combining extrusion process. The initial SiC particle size and volume fraction affect the wear and friction properties. The specific wear rate increases with increasing contents of SiC particles, regardless of the initial SiC particle size. However, when the SiC particle size is larger than a certain size and its content is greater than 10 %, the friction coefficient decreases rapidly. In the surface observations after friction tested specimens, the element map shows the Mg ratio relative to Si ratio (= SiC) increases with reducing friction coefficient. This indicates that good wear resistance is due to the formation of self-formed SiC layers during the friction process.

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• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

  © 2024.
  Licensed under the Creative Commons https://creativecommons.org/licenses/by-nc-nd/4.0/.

Keyword: Magnesium composite, Tribology, Friction coefficient, SiC powder

Date published: 2024-05-22

Publisher: Elsevier BV

Journal:

• Ceramics International (ISSN: 02728842) vol. 50 issue. 17 p. 30359-30366

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4670

First published URL: https://doi.org/10.1016/j.ceramint.2024.05.333

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Updated at: 2024-08-22 14:25:28 +0900

Published on MDR: 2026-05-23 08:31:09 +0900