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Open AccessArticle

Damping Capacity and Storage Modulus of SiC Matrix Composites Infiltrated by AlSi Alloy

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Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, School of Material Science and Engineering, Hebei University of Technology, Tianjin 300132, China
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Tianjin Gongda Galvanizing Equipment Co., Ltd., Tianjin 300132, China
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Authors to whom correspondence should be addressed.
Metals 2019, 9(11), 1195; https://doi.org/10.3390/met9111195
Received: 11 October 2019 / Revised: 28 October 2019 / Accepted: 4 November 2019 / Published: 7 November 2019
In this paper, we describe how an aluminum alloy-reinforced silicon carbide ceramic matrix composite (SiCCMC) with excellent damping capacity and storage modulus was fabricated by infiltration. The effects of silicon (Si) on the microstructure and damping capacity of the composite were studied. The interface bonding and damping mechanism involved were also discussed. The results show that composites with high damping capacity can be obtained by infiltrating SiC ceramics with aluminum alloy. The residual Si in the SiC ceramic had little effect on the damping capacity, and it provided the passage of aluminum alloy into the interior of the SiC ceramic. The aluminum atoms penetrate the SiC particles by diffusion. Optimal composite damping capacity was obtained when the Si content in the aluminum alloy was 15 wt. %, because the AlSi/SiC interface friction dissipated most of thermal energy. Ti3SiC2 formed on the surface had little effect on the damping capacity. Additionally, by changing the Si content in the aluminum alloy, the strength and damping capacity of the composites can be controlled. View Full-Text
Keywords: SiC ceramic matrix composite; AlSi alloy; damping capacity; storage modulus SiC ceramic matrix composite; AlSi alloy; damping capacity; storage modulus
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MDPI and ACS Style

Li, X.; Fan, Y.; Zhao, X.; Ma, R.; Du, A.; Cao, X.; Ban, H. Damping Capacity and Storage Modulus of SiC Matrix Composites Infiltrated by AlSi Alloy. Metals 2019, 9, 1195.

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