期刊
RESULTS IN PHYSICS
卷 19, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2020.103343
关键词
Al; Nanocomposites; Mechanical; Corrosion; CTE
资金
- deanship of scientific research (DSR) at King Abdulaziz University, Jeddah [RG-1-150-38]
- DSR
Recently, a growing interest has been dedicated towards improving the properties of Al alloys for use in various industrial applications. In this sense, mechanical alloying technique followed by sintering process at 460 and 560 degrees C in argon atmosphere was used to prepare Al2024 alloy matrix nanocomposites-reinforced by different graphene contents up to 2 wt%. Both XRD technique and TEM were employed to characterize the prepared nanocomposites powders. Microstructure analysis was performed on the sintered composites using SEM. Moreover, the relative density, corrosion rate, thermal expansion and electrical properties of the sintered nanocomposites were measured. Furthermore, their mechanical properties were measured with ultrasonic nondestructive technique. SEM and TEM micrographs revealed a uniform distribution of graphene in the Al alloy matrix. The relative density, coefficient of thermal expansion (CTE) and electrical conductivity of the specimens sintered at 460 degrees C decreased until reached 90.9%, 13.6 x 10(-6)/degrees C and 8.41 x 10(5) S/m, respectively as the graphene content increased to 2 wt%, while they increased to 93.8%, 1.5 x 10(-6)/degrees C and 4.20 x 10(6) S/m as the sintering temperature increased to 560 degrees C. On the other hand, the mechanical properties of the nanocomposites such as microhardness, elastic modulus and yield strength were enhanced to 155, 134 and 97%, respectively after adding 2 wt% graphene and sintering at 560 degrees C. Additionally, the corrosion rate decreased from 5.74 to 2.73 and 5.34 to 2.59 for the sample having 2 wt% graphene and sintered at 460 and 560 degrees C with increased the exposure from 24 to 144 h, respectively.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据