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首页> 外文期刊>CERAMICS INTERNATIONAL >Formation of compositional gradient in Al/SiC FGMs fabricated under huge centrifugal forces using solid-particle and mixed-powder methods
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Formation of compositional gradient in Al/SiC FGMs fabricated under huge centrifugal forces using solid-particle and mixed-powder methods

机译：使用固体颗粒和混合粉末法在巨大的离心力下制造的Al / SiC FGM中的组成梯度形成

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摘要

Formations of graded distribution of SiC ceramic particles within the hollow cylindrical shaped Al/SiC functionally graded materials (FGMs) fabricated by centrifugal solid-particle method (CSPM) and centrifugal mixed-powder method (CMPM) under huge centrifugal force are experimentally and theoretically investigated. The movement of SiC ceramic particles in viscous liquid under centrifugal force is explained based on Stoke's law. The effect of compositional gradient of particles on viscosity is taken into account. Also, the effect of temperature distribution on viscosity and density are considered. A computer code to simulate the formation of compositional gradient in the Al/SiC FGMs fabricated by CSPM and CMPM is developed. From the results, it is found that the volume fraction of SiC ceramic particles can be graded from the inner to the outer surface of hollow cylindrical shaped Al/SiC FGMs by CSPM. Meanwhile by CMPM, the SiC ceramic particles can be dispersed on the outer surface of hollow cylindrical shaped Al/SiC FGMs. The graded distribution in Al/SiC FGMs under huge centrifugal force is found to be significantly affected by the mold temperature but less affected by the temperature of molten Al and casting atmosphere.
机译：通过离心固体颗粒（CSPM）和离心式混合粉法（CMPM）制造的中空圆柱形Al / SiC功能梯度材料（FGM）在巨大的离心力下制造的中空圆柱形Al / SiC功能梯度材料（FGM）的形成在实验和理论上研究。基于Stoke的定律，解释了离心力下离心力下的粘性液体中的SiC陶瓷颗粒的运动。考虑了颗粒对粒子对粘度的作用梯度的影响。而且，考虑了温度分布对粘度和密度的影响。开发了一种计算机代码，用于模拟CSPM和CMPM制造的Al / SiC FGM中的组成梯度的形成。从结果中，发现SiC陶瓷颗粒的体积分数可以通过CSPM从中空圆柱形Al / SiC FGMS的内表面探蚀。同时通过CMPM，可以将SiC陶瓷颗粒分散在中空圆柱形Al / SiC FGM的外表面上。在巨大的离心力下，Al / SiC FGMS的分析被发现受模具温度的显着影响，但受熔融Al和浇铸气氛的温度影响。

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