High Thermal Conductivity and Mechanical Properties of Nanotube@Cu/Ag@Graphite/Aluminum Composites

Abstract

Weak interfacial bonding and the agglomeration of reinforcements are critical challenges for the expected performance in thermal management materials, hindering the extensive application of aluminum matrix composites. In this work, Cu particles, nanotubes, Ag-coated graphite flakes and films, urea, and starch were mixed together to fabricate porous preforms, which then were infiltrated by vacuum gas pressure at 720 °C. The effects of graphite film thickness on the microstructure and properties of thermal conductivity (TC) and coefficient of thermal expension were investigated. The nanotube@Cu/Ag@graphite/aluminum composites exhibited a high TC of 451 W/mK and excellent bending strength of 74 MPa, which were approximately increased by 48.8% and 126%, respectively, as compared with the samples without graphite film.

Preparation and properties of C/SiC composites reinforced by high thermal conductivity graphite films

“…And, it obeys the relationship between fracture strength and porosity (Eq. ( 5)), which could be understood that the fracture strength is strongly influenced by porosity with exponential function [22]. Therefore, the flexural strength of CS-1 composite is higher than the others.…”

Improvement in mechanical properties in AlN-h-BN composites with high thermal conductivity

“…Hexagonal boron nitride has a layered structure, and the layers are held together by van der Waals forces between each other. The good interfacial contact between the grains of each phase is beneficial to improve the mechanical properties of composites [29][30][31]. The lamellar structure is easily deformed and filled during the sintering process, which makes the two phases more closely bonded, and the addition of sintering additives reduces the formation of defects.…”

Non-equilibrium Molecular Dynamics for Calculating the Thermal Conductivity of Graphene-Coated Aluminum

“…The corrosion resistance of aluminum studies has been done by other researchers in the literature and it was also found that the graphene layer protects the aluminum against corrosion [14]. Moreover, Han et al [15] were fabricated nanotube@Cu/Ag@graphite/Al composite.…”