Microstructure and Damping Behavior of Continuous W-Core-SiC Fiber-Reinforced Aluminum Matrix Composites
Source abstract
Abstract
The damping behavior of continuous SiC fiber reinforced aluminum matrix (SiCf/Al) composite is still poorly understood. This paper examined the temperature dependence and strain amplitude dependence of damping capacities in 30 vol% SiCf/Al composites including SiCf/2024Al, SiCf/6061Al and SiCf/AlFe5Si2 composites, and the unreinforced aluminum alloys. Microstructure characterization was performed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron backscattered diffraction (EBSD) and X-ray diffraction (XRD) analysis to investigate the operative damping mechanisms in the SiCf/Al composites. The results show that uniform dispersion of SiCf and good interface bonding were achieved with these SiCf/Al composites. The damping capacity and dynamic modulus of these composites were greatly improved as compared with that of the unreinforced aluminum alloys. The dominant damping mechanisms for SiCf/Al composites were dislocation damping at low temperatures ( 150 ℃). This work indicated that the SiCf/AlFe5Si2 composite simultaneously exhibited good damping capacity and high dynamic modulus, having potential for aerospace applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Advanced ceramic materials synthesis · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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