발간논문

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Vol.31, No.12, 1487 ~ 1494, 1993
Title
Effect of Ni - P Coating for SiC Particles on Mechanical Behavior of SiCp / 2024 Al Composites
김경택Kyoung Taek Kim, 고명완Myung Wan Ko, 이지환Chi Hwan Lee
Abstract
In this paper, the effects of Ni-P coating on SiC particle in SiC_P/2024 Al composites have been studied in relation with mechanical properties. Elastic modulus of SiC_P/2024 Al composites tends to linearly increase as volume fraction of SiC particle increases. After Ni-P coating, elastic modulus of the composites with Ni-P coated SiC particle is shown to be much higher than that of the composites with uncoated SiC particle in the range of 10 to 30 vol% SiC particle. It is observed that the hardness of Ni-P coated SiC particle reinforced composites is superior to that of uncoated SiC particulate reinforced composites. This is due to the brittle and hard Ni₃P formed at consolidation temperature of 520℃ from Ni-P coating layer. Both the tensile strength and elongation in Ni-P coated SiC particle reinforced composites was found to be decreased in comparison with uncoated SiC particle reinforced composites, because the brittle Ni₃P phase were formed at the interface between SiC particle and 2024 Al matrix.
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