Formation of multilayer interfaces and the load transfer in graphene nanoplatelets reinforced Al matrix composites

In this work, few-layered MoS2 (FLM) nanosheet-reinforced Al matrix composites are developed through powder metallurgy and hot extrusion. The microstructure, mechanical properties, and strengthening mechanisms have been systematically investigated. It is found that Al12Mo and Al2S3 can be formed in-situ during the sintering process, resulting in the improvement of interfacial bonding between FLM and Al matrix. With 1.5 wt.% of FLM addition, an improved tensile strength of 234 MPa with a high elongation of 17% can be obtained. Moreover, the strengthening mechanisms are also demonstrated to be grain refinement, dislocation strengthening, and load transfer, and the calculation indicates that load transfer is the main contribution factor. This work will inspire more new designs of metal matrix composites with balanced strength and ductility.

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Microstructural characteristics and mechanical behavior of microwave-assisted sintered ferromagnetic FeCoNi1.5CrCu HEAp/Al matrix composites

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.158439 ◽

2021 ◽

Vol 861 ◽

pp. 158439

Author(s):

Li Guirong ◽

Wen Haoran ◽

Wang Hongming ◽

Ren Wenxiang ◽

Yan Yuwei ◽

...

Keyword(s):

Mechanical Behavior ◽

Matrix Composites ◽

Microstructural Characteristics ◽

Microwave Assisted ◽

Al Matrix Composites ◽

Al Matrix

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Enhancement on the Tribological Properties of the Multilayer RGO/Al Matrix Composites by Cu-Coating Method

Materials ◽

10.3390/ma14123163 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3163

Author(s):

Fengguo Liu ◽

Ning Su ◽

Renguo Guan

Keyword(s):

Electron Microscope ◽

Tribological Properties ◽

Milled Powder ◽

Wear Loss ◽

Matrix Composites ◽

Tem Analysis ◽

Lubricating Film ◽

Coating Method ◽

Al Matrix Composites ◽

Al Matrix

Multilayer reduced graphene oxide (mrGO) was chemically modified by electroless plating of copper on surface to form mrGO-Cu. The scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis revealed that nano-Cu particles were uniformly dispersed on the surface of mrGO. The mrGO-Cu powders were further utilized as reinforcements for aluminum (Al) matrix and the mrGO-Cu/Al composite was successfully fabricated through clad rolling of milled powder. The tribological properties of the mrGO-Cu/Al composites were explored. The tribological results show that the mrGO-Cu could reduce the friction coefficient and wear loss of mrGO-Cu/Al composites, since the mrGO-Cu participated in lubricating processes due to the formation of a transfer layer on the contact surface. Furthermore, it is found that the composition of mrGO-Cu could significantly influence the tribological properties of the mrGO-Cu/Al composites. The composites with 4% of mrGO-Cu for composites exhibited the best tribological behavior, which transformed from adhesive wear to abrasive wear, due to the formation of a graphite lubricating film.

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Al Matrix Composites Reinforced by Ti and C Dedicated to Work at Elevated Temperature

Materials ◽

10.3390/ma14113114 ◽

2021 ◽

Vol 14 (11) ◽

pp. 3114

Author(s):

Bartosz Hekner ◽

Jerzy Myalski ◽

Patryk Wrześniowski ◽

Tomasz Maciąg

Keyword(s):

Working Conditions ◽

Elevated Temperatures ◽

Aluminium Matrix ◽

Carbon Surface ◽

Matrix Composites ◽

Time Intervals ◽

Aluminium Matrix Composites ◽

Al Matrix Composites ◽

Microstructure Of The Material ◽

Al Matrix

In this paper, the applicability of aluminium matrix composites to high-temperature working conditions (not exceeding the Al melting point) was evaluated. The behaviour of Al-Ti-C composites at elevated temperatures was described based on microstructural and phase composition observations for composites heated at temperatures of 540 and 600 °C over differing time intervals from 2 to 72 h. The materials investigated were aluminium matrix composites (AMC) reinforced with a spatial carbon (C) structure covered by a titanium (Ti) layer. This layer protected the carbon surface against contact with the aluminium during processing, protection which was maintained for the material’s lifetime and ensured the required phase compositions of Al4C3 phase limitation and AlTi3 phase creation. It was also proved that heat treatment influenced not only phase compositions but also the microstructure of the material, and, as a consequence, the properties of the composite.

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