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Reciprocating Friction and Wear Behavior of Zr2[Al(Si)]4C5 and Zr2[Al(Si)]4C5–SiC Composite Against Si3N4 Ball

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The reciprocating sliding friction and wear properties of two novel materials of Zr2[Al(Si)]4C5 ceramic and Zr2[Al(Si)]4C5–30 vol% SiC composite against Si3N4 ball were investigated. The sliding friction process of Zr2[Al(Si)]4C5 against Si3N4 experiences two different stages under constant normal load and involves friction and wear mechanism transition. The static coefficient of friction increases with an increasing normal load. The friction force mainly comes from the interfacial shear between Si3N4 ball and Zr2[Al(Si)]4C5, which changes with varied sliding distances and normal loads. In contrast, the friction process of the composite experiences one stage and the friction coefficient is not related to the test durations and normal loads. The friction force between Zr2[Al(Si)]4C5–30 vol% SiC composite and Si3N4 is mainly from the plough between SiC particles and Si3N4 ball, which appears not to be influenced significantly by different normal load and sliding distance. In addition, microfracture induced mechanical wear is the rate-control wear mechanism in both Zr2[Al(Si)]4C5 and Zr2[Al(Si)]4C5–30 vol% SiC composite. Adding SiC improves the wear resistance of the single-phase material, because the second phase bears normal load and slows down material removal.
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Document Type: Research Article

Affiliations: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Publication date: August 1, 2010

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