Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:670

Article

Zare, Hassan¹  Jahedi, Mohammad²  Toroghinejad, Mohammad Reza¹  Meratian, Mahmoud¹  Knezevic, Marko² 

[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran

[2] Univ New Hampshire, Dept Mech Engn, Durham, NH 03824 USA

关键词: Metal matrix composites;    Powder processing;    Severe plastic deformation;    Particle distribution;    Consolidation;   

DOI  :  10.1016/j.msea.2016.06.027

来源: Elsevier

【 摘 要 】

In this work, 2 vol% carbon nanotubes (CNTs) reinforced aluminum (Al) matrix composites of superior microstructural homogeneity are successfully synthesized using Bc equal-channel angular extrusion (ECAP) route. The key step in arriving at high level of homogeneous distribution of CNTs within Al was preparation of the powder using simultaneous attrition milling and ultra-sonication processes. Microstructure as revealed by electron microscopy and absence of Vickers hardness gradients across the material demonstrate that the material reached the homogeneous state in terms of CNT distribution, porosity distribution, and grain structure after eight ECAP passes. To facilitate comparison of microstructure and hardness, samples of Al were processed under the same ECAP conditions. Significantly, the composite containing only 2 vol% exhibits 20% increase in hardness relative to the Al samples. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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