Interface and strengthening mechanisms of Al matrix composites reinforced with in-situ CNTs grown on Ti particles

C.M.Y. Yang; X. Li; C.J. Li; Y.Z. Peng; Y. Xing; Z.X. Feng; J. Tan; J.M. Tao; Z.L. Li; Y.R. Wang; B.H. Yu; J.H. Yi

Materials & Design (May 2023)

Interface and strengthening mechanisms of Al matrix composites reinforced with in-situ CNTs grown on Ti particles

C.M.Y. Yang,
X. Li,
C.J. Li,
Y.Z. Peng,
Y. Xing,
Z.X. Feng,
J. Tan,
J.M. Tao,
Z.L. Li,
Y.R. Wang,
B.H. Yu,
J.H. Yi

Affiliations

C.M.Y. Yang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China
X. Li: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
C.J. Li: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China; Corresponding authors at: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Y.Z. Peng: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China
Y. Xing: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China
Z.X. Feng: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China
J. Tan: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
J.M. Tao: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China
Z.L. Li: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Y.R. Wang: Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China; Yunnan Hao Xin Foil Co., LTD, Yunnan Aluminum Co., LTD, Kunming 650502, China
B.H. Yu: Yunnan Key Laboratory of New Aluminum-based Materials, Kunming 650502, China; Yunnan Hao Xin Foil Co., LTD, Yunnan Aluminum Co., LTD, Kunming 650502, China
J.H. Yi: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Yunnan Engineering Research Center of Metallic Powder Materials, Kunming University of Science and Technology, Kunming 650093, China; Corresponding authors at: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Journal volume & issue: Vol. 229
p. 111923

Abstract

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The strengthening effect of carbon nanotubes (CNTs) in Al matrix composites (AMCs) is significantly weakened by CNTs agglomeration and unsubstantial interfacial bonding with the Al matrix. In this study, CNTs were grown on the surface of Ti particles by chemical vapor deposition to obtain CNTs@Ti hybrid reinforcement, followed by powder metallurgy to prepare CNTs@Ti/Al composites. Evenly dispersed CNTs with good structural integrity were successfully obtained using the carrying effect of the micron-sized Ti particles. Meanwhile, TiC, Al4C3, and TiAl3 were generated at the CNT/Al interface, which strengthened the bearing capacity of the inner-wall of the CNTs, improved the wettability of the CNT/Al interface, and enhanced the strain-hardening ability of the Al matrix. The deficiencies in the CNTs/Al composites are compensated by this kind of materials design, and the two types of reinforcements have a synergistic strengthening effect, which greatly improves the comprehensive mechanical properties of AMCs. An excellent interface structure is formed by controlling the interface reaction such that the dispersion, grain boundary, dislocation, and load transfer strengthening mechanisms are fully realized.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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