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6CCVD Research

Effects of Chromium Carbide Coatings on Microstructure and Thermal Conductivity of Mg/Diamond Composites Prepared by Squeeze Casting

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2022-02-09
JournalMaterials
AuthorsJianwei Li, Peng Ren, Jinming Ru, Jianhua Wu, Kaixiang Zhou
InstitutionsJiangsu University, Qilu University of Technology
Citations8

Abstract

Section titled ā€œAbstractā€

Magnesium matrix composites are considered a desired solution for lightweight applications. As an attractive thermal management material, diamond particle-reinforced Mg matrix (Mg/diamond) composites generally exhibit thermal conductivities lower than expected. To exploit the potential of heat conduction, a combination of Cr coating on diamond particles and squeeze casting was used to prepare Mg/diamond (Cr) composites. The thickness of the Cr coating under different coating processes (950 Ā°C/30 min, 950 Ā°C/60 min, 950 Ā°C/90 min, 1000 Ā°C/30 min, and 1050 Ā°C/30 min) was measured by FIB-SEM to be 1.09-2.95 Ī¼m. The thermal conductivity (TC) of the Mg/diamond composites firstly increased and then decreased, while the coefficient of thermal expansion (CTE) of Mg/diamond (Cr) composite firstly decreased and then increased with the increase in Cr coating thickness. The composite exhibited the maximum TC of 202.42 W/(mĀ·K) with a 1.20 Ī¼m Cr coating layer, while a minimum CTE of 5.82 Ɨ 10āˆ’6/K was recorded with a coating thickness of 2.50 Ī¼m. The results clearly manifest the effect of Cr layer thickness on the TC and CTE of Mg/diamond composites.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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