Bending Properties and Failure Mechanism of Continuous W-Core-SiC Fiber-Reinforced 2024 and 6061 Aluminum Matrix Composites

Chu, Desheng; Ma, Yue; Li, Peiyong; Tang, Peng

doi:10.1007/s11665-020-05119-8

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…W-core SiC filament exhibits high tensile strength, high stiffness and excellent irradiation resistance, and has a good compatibility with many metallic materials. Therefore, it is often used as the reinforcement of metal matrix composites, in developing lightweight structural components in aeroengines and plasma-facing components for fusion reactors [1][2][3]. Considering the mechanical performance of metal matrix composites are, mainly, determined by that of the reinforcement, it is essential to gain insight into the relationship between the microstructure and mechanical properties of W-core SiC filament.…”

Section: Introductionmentioning

confidence: 99%

Influence of Supersaturation on Growth Behavior and Mechanical Properties of Polycrystalline 3C-SiC on W Wire Substrate

Shuai

X²,

Bin³

et al. 2022

Metals

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As an important reinforcement for metal matrix composites, the microstructure and mechanical properties of W-core SiC filament have drawn increasing attentions among researchers. In this work, the growth behavior of polycrystalline 3C-SiC on W-wire substrate in the chemical vapor deposition (CVD) process and the evolution of mechanical properties in preparation of W-core SiC filament, were investigated as a function of gas-phase supersaturation. Kinetic studies revealed that the growth of 3C-SiC grains was limited by surface reactions at both 850 °C and 1050 °C, and the deposit experienced similar morphological changes from a porous structure to large clusters, with the increase in supersaturation. Structural analyses and mechanical tests show that the production of pores and the amorphous phase with a low supersaturation, of 9.6 × 107 at 850 °C, resulted in a reduction in the modulus and hardness of the polycrystalline deposits, to 270.3 GPa and 33.9 GPa, while the reduced structural defects (e.g., stacking faults and twins) in highly (111) orientated 3C-SiC grains, as well as the improved surface quality obtained with the medium supersaturation of 1.6 × 107 at 1050 °C, enhanced the tensile strength and the Weibull modulus of W-core SiC filament to 2.88 GPa and 11.2, respectively. During the growth of 3C-SiC grains, the variation in structural defects density is controlled by the critical nucleation energy of the two-dimensional (2D) nucleus.

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Section: Introductionmentioning

confidence: 99%