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http://dx.doi.org/10.7234/kscm.2010.23.2.010

Evaluation of Dry Tribological Characteristics of Hybrid Metal Matrix Composites with Temperature Rising  

Wang, Yi-Qi (Dept. Mechanical Eng., Changwon National University)
Afsar, Ali-Md. (Dept. Mechanical Eng., Changwon National University)
Song, Jung-Il (Dept. Mechanical Eng., Changwon National University)
Publication Information
Composites Research / v.23, no.2, 2010 , pp. 10-16 More about this Journal
Abstract
$Al_2O_3$ fiber and SiC particle hybrid metal matrix composites (MMCs) were manufactured by squeeze casting method investigated for their tribological properties. The pin specimens had different ratios of fiber to particle content but their total weight fraction was constant at 20 wt. %. Tribological tests were performed with a pin-on-disk friction and wear tester. The investigation of the dry tribological characteristics of hybrid MMCs were carried out at room temperature and elevated temperature of$100^{\circ}C$ and$150^{\circ}C$. The morphologies of worn surfaces were examined by scanning electron microscope (SEM) to observe tribological characteristics and investigate wear behavior. The results revealed that the wear resistance improved with the content of SiCp increased of the planar random (PR) MMCs at room temperature. At the elevated temperature, it revealed that the wear resistance of normal (N) MMCs was superior to that of the PR-MMCs due to PR-fibers were easily pulled out holistically from the worn surface. Meanwhile, the coefficient of friction decreased with the temperature increasing.
Keywords
Tribology; Metal matrix composites; Fiber orientation; Wear resistance; Wear mechanism;
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