Advance of Carbon Reinforced Metal-Matrix Composites

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Matrix Composites".

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 3368

Special Issue Editors


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Guest Editor
Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials, Institute of Advanced Materials, Shandong Academy of Sciences, Jinan 250014, China
Interests: particle-reinforced Al/Mg-based composites; semisolid forming; solidification theory and technology

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Guest Editor
Materials Science Department, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
Interests: powder metallurgy; composite materials; nanocarbon materials; non-equilibrium and nanostructured metal systems
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Special Issue Information

Dear Colleagues,

With the development of metal-matrix composites (MMCs), carbonaceous reinforcements such as graphite particles, carbon nanotubes, graphene, SiC particles etc. have received increasing attention owing to their lower density, perfect elastic modulus and strength, good thermal conductivity, and excellent electrical properties. Simultaneously, the preparation technologies for MMCs are also developing—advanced equipment and technology are applied in powder metallurgy, semisolid forming, die casting, etc. Thus, the current Special Issue focuses on carbon-reinforced MMCs, including but not limited to advanced MMCs, preparation technology and performance.

Dr. Suqing Zhang
Dr. Oleg Tolochko
Guest Editors

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Keywords

  • metal-matrix composites
  • preparation technology
  • performance of metal-matrix composites

Published Papers (3 papers)

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Research

11 pages, 5802 KiB  
Article
Microstructure and Mechanical Properties in a Gd-Modified Extruded Mg-4Al-3.5Ca Alloy
by Jixue Zhou, Dongqing Zhao, Shouqiu Tang, Yu Liu, Suqing Zhang, Yunteng Liu, Jianhua Wu, Xiaocun Song, Hongtao Liu, Xinfang Zhang, Pengfei Yan and Xitao Wang
Metals 2023, 13(8), 1333; https://doi.org/10.3390/met13081333 - 26 Jul 2023
Cited by 1 | Viewed by 744
Abstract
In the present study, the microstructure and mechanical properties of a new Mg-4Al-3.5Ca-2Gd (AXE432) alloy are investigated. The microstructure of the as-cast AXE432 alloy consists of α-Mg, C14 (Mg2Ca), and C36((Mg, Al)2Ca) phases. After the heat treatment at 480 [...] Read more.
In the present study, the microstructure and mechanical properties of a new Mg-4Al-3.5Ca-2Gd (AXE432) alloy are investigated. The microstructure of the as-cast AXE432 alloy consists of α-Mg, C14 (Mg2Ca), and C36((Mg, Al)2Ca) phases. After the heat treatment at 480 °C for 8 h, the C14 with fine lamellar structure changes from narrow stripes to micro-scale particles, and part of the C36 and the C14 dissolve into the α-Mg matrix, with many short needle-shaped C15 (Al2Ca) phase precipitating in the primary a-Mg grains. The AXE432 alloy extruded at a temperature as high as 420 °C exhibits a refined dynamically recrystallized (DRXed) microstructure with grain sizes less than 1.5 ± 0.5 μm and a strong {0001}<101¯0> basal texture with a maximum intensity of 5.62. A complex combination of the effects from grain size, texture, second-phase particles, and strain hardening results in balanced mechanical properties, with the tensile yield strength (TYS), ultimate tensile strength (UTS), elongation (El), compressive yield strength (CYS), and ultimate compressive strength (UCS) of 331.4 ± 2.1 MPa, 336.9 ± 3.8 MPa, 16.1 ± 2.3%, 270.4 ± 1.6 MPa and 574.5 ± 12.4 MPa, respectively. Full article
(This article belongs to the Special Issue Advance of Carbon Reinforced Metal-Matrix Composites)
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7 pages, 15480 KiB  
Communication
Investigation of Copper–Carbon Composite Microstructure and Properties
by Elizaveta Bobrynina, Tatiana Koltsova and Tatiana Larionova
Metals 2023, 13(6), 1052; https://doi.org/10.3390/met13061052 - 31 May 2023
Cited by 3 | Viewed by 1104
Abstract
This paper presents a study of microstructures and properties of pure copper and copper–fullerene-soot (Cu-FS) composite materials produced by mechanical milling followed by hot pressing. The electrochemical etching method was successfully applied to reveal the fragmented structure of the specimens produced by high-energy [...] Read more.
This paper presents a study of microstructures and properties of pure copper and copper–fullerene-soot (Cu-FS) composite materials produced by mechanical milling followed by hot pressing. The electrochemical etching method was successfully applied to reveal the fragmented structure of the specimens produced by high-energy ball milling. It is shown the carbon nanoparticles are involved in the composite microstructure formation. Copper–fullerene-soot composite materials have a complex microstructure with a bimodal grain distribution. Both recrystallized (average 3 μm) and polygonized (155 nm) grains are observed in the microstructure. Thus, in the case of pure copper, due to the absence of carbon nanoparticles, only recrystallized grains are observed in the microstructure. The Cu-FS composite has a hardness up to 160 HV and thermal stability up to 700 °C. Full article
(This article belongs to the Special Issue Advance of Carbon Reinforced Metal-Matrix Composites)
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13 pages, 14900 KiB  
Article
Effects of Mold Temperature on the Microstructures and Tensile Properties of the Thixoforged Graphite/AZ91D Composite
by Kejian Geng, Haipeng Jiang, Suqing Zhang, Xin Gao, Jianhua Wu, Cuicui Sun, Jixue Zhou and Xinfang Zhang
Metals 2023, 13(5), 1000; https://doi.org/10.3390/met13051000 - 21 May 2023
Cited by 1 | Viewed by 1171
Abstract
The effects of mold temperatures on the microstructures and mechanical properties of thixoforged Grp (graphite particles)/AZ91D composites have been investigated, followed by partial remelting and thixoforging technology. The results indicate that the best semi-solid microstructure could be obtained after being partially remelted at [...] Read more.
The effects of mold temperatures on the microstructures and mechanical properties of thixoforged Grp (graphite particles)/AZ91D composites have been investigated, followed by partial remelting and thixoforging technology. The results indicate that the best semi-solid microstructure could be obtained after being partially remelted at 600 °C and held for 60 min. Correspondingly, under a mold temperature of 300 °C, the best tensile properties were obtained by thixoforging. The UTS (ultimate tensile strength) and elongation of the thixoforged Grp/AZ91D were up to 304.1 MPa and 13.9%, respectively, which increased 11.3% and 43.1% in comparison with the thixoforged AZ91D, respectively. The variation of the tensile properties responded to the influences of mold temperatures on the amount of eutectic phase, the distribution of Grp, and the grain size of α-Mg. Meanwhile, HRTEM (High Resolution Transmission Electron Microscope) showed good bonding between Grp and AZ91D, and many edge dislocations were found in the inverse FFT (Fast Fourier Transform) image. And the result showed that the increase in tensile properties is attributed to the synergistic effect of load transfer, dislocation strengthening, and Orowan looping mechanisms from the Grp strengthening the matrix. Full article
(This article belongs to the Special Issue Advance of Carbon Reinforced Metal-Matrix Composites)
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