Synthesis and Analysis of the Thermal Behavior of SiC-Fibre Reinforced Copper Matrix Composites as Heat Sink Material

Copper matrix composites reinforced with silicon carbide fibres (SiCf/Cu) are considered as heat sink materials for the divertor of DEMO as they combine high thermal conductivity and good mechanical strength at high temperature. A new method was developed to synthesise a metal matrix composite (MMC) consisting of about 3-6 unidirectional reinforced layers (UD-layers). The UD-layers were prepared by two subsequent electroplating processes which allow to adjust various fibre volume fractions. These single UD layers were stacked with different relative fibre orientations (0°/0° and 0°/90°) and consolidated by vacuum hot pressing to form the MMC specimen. The thermal conductivity perpendicular to fibre direction was obtained by laser flash apparatus (LFA) measurements. It is about 310 Wm-1K-1 for electroplated copper (Cu) and above 200 Wm-1K-1 for MMC specimens with a fibre volume fraction of 8-13%. Due to the manufacturing process, boundaries within the matrix were found resulting in a reduction of the values. In addition, DSC (differential scanning calorimetry) measurements were performed which gave similar results.

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Thermo-Physical Properties of Copper Matrix Composites Reinforced with 3D-SiC Network

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.150-151.144 ◽

2010 ◽

Vol 150-151 ◽

pp. 144-149

Author(s):

Hong Wei Xing ◽

Jin Song Zhang ◽

Xiao Ming Cao

Keyword(s):

Thermal Conductivity ◽

Physical Properties ◽

Room Temperature ◽

Volume Fraction ◽

Copper Matrix ◽

High Thermal Stability ◽

Matrix Composites ◽

Copper Matrix Composites ◽

Specific Heat Capacities ◽

Thermo Physical Properties

Copper matrix composites reinforced with 3D-SiC network (15v% and 20v% SiC) were fabricated by squeezing copper alloy into 3D-SiC network preforms. The thermo-physical properties of the copper matrix composites were investigated. The specific heat capacities of the composites were about 0.39~0.50 J•g-1•K-1. The coefficients of thermal expansion (CTEs) of the composites were found to be lower than 6.9×10-6 -1 at Room Temperature. The composites exhibited high thermal stability for 3D-SiC network advent. The thermal conductivity of the composites was in the range of 50~80W•m−1•K−1. The thermo-physical properties of Cu matrix composites had a great relationship with the structures of 3D-SiC network preforms. The thermal conductivity of the composites decreased with an increase in the volume fraction of SiC or the structures of the limbs changing compacted, but the CTEs were not completely according this rule.

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Preparation and thermophysical properties of graphite flake-carbon fiber coreinforced copper matrix composites

Materials Research Express ◽

10.1088/2053-1591/ac440a ◽

2021 ◽

Author(s):

Junchen Huang ◽

Guodong Miu ◽

TongLe Liu ◽

Chen Huang ◽

Shibo Guo ◽

...

Keyword(s):

Thermal Conductivity ◽

Carbon Fiber ◽

Hot Pressing ◽

Bending Strength ◽

Volume Fraction ◽

Copper Matrix ◽

Graphite Flake ◽

Matrix Composites ◽

Copper Matrix Composites ◽

Hot Pressing Sintering

Abstract Graphite flake-carbon fiber coreinforced copper matrix composites were prepared by vacuum hot pressing technology. The carbon fibers were dispersed ultrasonic in alcohol and then mixed with graphite flake and alloys powder（Zr and Cu）for hot pressing sintering. The effects of the carbon fiber content on the microstructure, bending strength and thermal conductivity of the composites were investigated. The results show that the interface of the composites is well bonded. When the volume fraction of carbon fiber is 1%-3%, the carbon fiber can be uniformly dispersed in the matrix, and the bending strength of the composites can be improved effectively. When the volume fraction of carbon fiber is 2%, the bending strength reaches a maximum of 152 MPa, which is an increase of 60% compared with that of the composites without carbon fiber. However, an excessive addition of carbon fiber (4% or more) leads to an uneven distribution of carbon fiber, and the bending strength of the composites decreases. When the volume fraction of carbon fiber is 2%, the thermal conductivity of the composite is 597 W·m-1·K-1. The acoustic mismatch model (AMM) associated with the Digimat MF module is able to predict the thermal conductivity of the anisotropic multiphase composites.

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MICROSTRUCTURE AND PROPERTIES OF SiC PARTICLES REINFORCED COPPER BASED ALLOY COMPOSITE

Modern Physics Letters B ◽

10.1142/s021798491341025x ◽

2013 ◽

Vol 27 (19) ◽

pp. 1341025 ◽

Cited By ~ 1

Author(s):

YU HONG ◽

XIAOLI CHEN ◽

WENFANG WANG ◽

YUCHENG WU

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Electrical Conductivity ◽

Relative Density ◽

Volume Fraction ◽

Copper Matrix ◽

Matrix Composites ◽

Wear Properties ◽

Sic Particles ◽

Copper Based Alloy

Copper-matrix composites reinforced with SiC particles are prepared by mechanical alloying. The microstructure characteristics, relative density, hardness, tensile strength, electrical conductivity, thermal conductivity and wear properties of the composites are investigated in this paper. The results indicate that the relative density, macro-hardness and mechanical properties of composites are improved by modifying the surface of SiC particles with Cu and Ni . The electrical conductivity and thermal conductivity of composites, however, are not obviously improved. For a given volume fraction of SiC , the Cu / SiC ( Ni ) has higher mechanical properties than Cu / SiC ( Cu ). The wear resistance of the composites are improved by the addition of SiC . The composites with optimized interface have lower wear rate.

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Thermal conductivity of textile reinforcements for composites

Journal of Textiles and Fibrous Materials ◽

10.1177/2515221117751154 ◽

2018 ◽

Vol 1 ◽

pp. 251522111775115 ◽

Cited By ~ 3

Author(s):

Yue El-Hage ◽

Simon Hind ◽

François Robitaille

Keyword(s):

Thermal Conductivity ◽

Carbon Fibre ◽

Volume Fraction ◽

Fibre Volume Fraction ◽

Three Dimensional ◽

Fibre Volume ◽

Published Data ◽

Manufacturing Processes ◽

Composites Manufacturing ◽

The Relationship

Thermal conductivity data for dry carbon fibre fabrics are required for modelling heat transfer during composites manufacturing processes; however, very few published data are available. This article reports in-plane and through-thickness thermal conductivities measured as a function of fibre volume fraction ( Vf) for non-crimp and twill carbon reinforcement fabrics, three-dimensional weaves and reinforcement stacks assembled with one-sided carbon stitch. Composites made from these reinforcements and glass fibre fabrics are also measured. Clear trends are observed and the effects of Vf, de-bulking and vacuum are quantified along with orthotropy ratios. Limited differences between the conductivity of dry glass and carbon fibre fabrics in the through-thickness direction are reported. An unexpected trend in the relationship between that quantity and Vf is explained summarily through simple simulations.

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