Microstructure and mechanical properties of SiC nanoparticles reinforced magnesium matrix composites fabricated by ultrasonic vibration
Microstructure and mechanical properties of SiC nanoparticles reinforced magnesium matrix composites fabricated by ultrasonic vibration
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DOI：
10.1016/j.msea.2011.03.061
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发表时间：
2011-06-15
期刊：
影响因子：
6.4
通讯作者：
Zheng, M. Y.
中科院分区：
文献类型：
--
作者：
Nie, K. B.;Wang, X. J.;Zheng, M. Y.
采用超声振动法制备了颗粒增强镁基纳米复合材料。与铸态AZ91合金相比，SiCp/AZ91纳米复合材料基体的晶粒尺寸减小，Mg17Al12相的形貌由粗板相变为片层相。虽然纳米复合材料中仍存在一些SiC微团簇，但大多数SiC纳米颗粒在微团簇外分散良好。与AZ91合金相比，SiCp/AZ91纳米复合材料的极限抗拉强度、屈服强度和断裂伸长率均有显著提高。对复合材料中SiC纳米颗粒与基体界面的研究表明，SiC纳米颗粒与基体结合良好，无界面活性。(C) 2011 Elsevier B.V.版权所有
A particulate reinforced magnesium matrix nanocomposite was fabricated by ultrasonic vibration. Compared with as-cast AZ91 alloy, grain size of matrix in the SiCp/AZ91 nanocomposite decreased and morphology of phase Mg17Al12 varied from coarse plates to lamellar precipitates. Although there were still some SiC microclusters in the nanocomposite, most of the SiC nanoparticles were dispersed well outside the microclusters. The ultimate tensile strength, yield strength and elongation to fracture of the SiCp/AZ91 nanocomposite were simultaneously enhanced compared with that of the AZ91 alloy. The study of interface between the SiC nanoparticles and the matrix in the nanocomposite suggested that SiC nanoparticles bonded well with the matrix without interfacial activity. (C) 2011 Elsevier B.V. All rights reserved.