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Metals 2018, 8(8), 647; https://doi.org/10.3390/met8080647

B4C Particles Reinforced Al2024 Composites via Mechanical Milling

1
Advanced Materials Research Center (CIMAV), National Laboratory of Nanotechnology, Miguel de Cervantes No. 120, Chihuahua C.P. 31136, Mexico
2
La Salle University of Chihuahua, Prol. Lomas de Majalca No. 11201, Chihuahua C.P. 31020, Mexico
3
CONACYT-The Mexican Corporation for Research on Materials (COMIMSA), Ciencia y Tecnología 790, Fracc. Saltillo 400, Saltillo C.P. 25290, Mexico
*
Author to whom correspondence should be addressed.
Received: 13 July 2018 / Revised: 3 August 2018 / Accepted: 14 August 2018 / Published: 17 August 2018
(This article belongs to the Special Issue Modern Aerospace Materials)
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Abstract

The control of a homogeneous distribution of the reinforcing phase in aluminum matrix composites is the main issue during the synthesis of this kind of material. In this work, 2024 aluminum matrix composites reinforced with boron carbide were produced by mechanical milling, using 1 and 2 h of milling. After milling, powdered samples were cold consolidated, sintered and T6 heat treated. The morphology and microstructure of Al2024/B4C composites were investigated by scanning electron microscopy; analysis of X-ray diffraction peaks were used for the calculation of the crystallite size and microstrains by the Williamson–Hall method. The mechanical properties were evaluated by compression and hardness tests. B4C particles were found to be well dispersed into the aluminum matrix as a result of the high-energy milling process. The crystallite size of composites milled for 2 h was lower than those milled for 1 h. The hardness, yield strength and maximum strength were significantly improved in the composites processed for 2 h, in comparison to those processed for 1 h and the monolithic 2024 alloy. View Full-Text
Keywords: Al2024; boron carbide; mechanical milling Al2024; boron carbide; mechanical milling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Carreño-Gallardo, C.; Estrada-Guel, I.; López-Meléndez, C.; Ledezma-Sillas, E.; Castañeda-Balderas, R.; Pérez-Bustamante, R.; Herrera-Ramírez, J.M. B4C Particles Reinforced Al2024 Composites via Mechanical Milling. Metals 2018, 8, 647.

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