Preparation and Performance Characterization of Copper and Diamond Filled Composite Thermal Conductivity Materials

IF 1.3 4区工程技术 Q2 ENGINEERING, AEROSPACE

Microgravity Science and Technology Pub Date : 2023-11-17 DOI:10.1007/s12217-023-10082-9

Shuai Wang, Xiang Ma, Quan Gao, Jinyu Wang, Na Xu, Yonghai Zhang, Jinjia Wei, Jianfu Zhao, Bin Li

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Abstract

An experimental investigation was conducted to prepare and study the thermal conductivity performance of copper and diamond composite materials. Copper powder and diamond particles were used as fillers, epoxy resin was used as matrix, and composite materials were prepared by vacuum-assisted mechanical stirring. The thermal expansion coefficient of different composite materials was measured by a laser flash method, which can be used to calculate the thermal conductivity. The effect of the filling rate of copper powder, the morphology of copper powder, the filling rate of diamond, and the thermal conductivity of the particles on the thermal conductivity of composite materials was studied. The results showed that thermal conductivity of copper powder and diamond particles composite materials were 874% and 535% higher than that of the epoxy resin when their filling rates were 50.3 vol.% and 40.0 vol.%, respectively. For two-dimensional flake copper powder materials, the thermal conductivity could be effectively improved at a lower filling rate. However, the flake particles were easy to aggregate at a high filling rate, which maybe cause the composite materials to pulverize.

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铜-金刚石复合导热材料的制备及性能表征

对铜金刚石复合材料的导热性能进行了实验研究。以铜粉和金刚石颗粒为填料，环氧树脂为基体，采用真空辅助机械搅拌法制备复合材料。采用激光闪蒸法测量了不同复合材料的热膨胀系数，可用于计算复合材料的导热系数。研究了铜粉填充率、铜粉形貌、金刚石填充率和颗粒导热系数对复合材料导热系数的影响。结果表明:当铜粉和金刚石颗粒填充率分别为50.3 vol.%和40.0 vol.%时，复合材料的导热系数分别比环氧树脂高874%和535%;对于二维片状铜粉材料，在较低的填充率下，可以有效地提高其导热性。然而，在高填充率下，片状颗粒容易聚集，这可能导致复合材料粉碎。

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来源期刊

Microgravity Science and Technology 工程技术-工程：宇航

CiteScore

3.50

自引率

44.40%

发文量

期刊介绍： Microgravity Science and Technology – An International Journal for Microgravity and Space Exploration Related Research is a is a peer-reviewed scientific journal concerned with all topics, experimental as well as theoretical, related to research carried out under conditions of altered gravity. Microgravity Science and Technology publishes papers dealing with studies performed on and prepared for platforms that provide real microgravity conditions (such as drop towers, parabolic flights, sounding rockets, reentry capsules and orbiting platforms), and on ground-based facilities aiming to simulate microgravity conditions on earth (such as levitrons, clinostats, random positioning machines, bed rest facilities, and micro-scale or neutral buoyancy facilities) or providing artificial gravity conditions (such as centrifuges). Data from preparatory tests, hardware and instrumentation developments, lessons learnt as well as theoretical gravity-related considerations are welcome. Included science disciplines with gravity-related topics are: − materials science − fluid mechanics − process engineering − physics − chemistry − heat and mass transfer − gravitational biology − radiation biology − exobiology and astrobiology − human physiology