Thermal expansion behaviour of unidirectional carbon-fibre-reinforced copper-matrix composites
Thermal expansion behaviour of unidirectional carbon-fibre-reinforced copper-matrix composites
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DOI：
10.1016/s1359-835x(98)00066-9
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发表时间：
1998-01-01
影响因子：
8.7
通讯作者：
Groboth, G
中科院分区：
文献类型：
--
作者：
Korb, G;Korab, J;Groboth, G
采用扩散连接技术制备了连续碳纤维增强铜基复合材料，并对其热膨胀系数进行了研究。出于经济和易于获得的原因，连续Torayca T300纤维已用于样品制备。他们被连续涂敷铜（电镀，然后化学）和单向复合材料的制备在真空中在873 K的30分钟通过扩散结合。的线性热膨胀系数（CTE）的样品与不同的体积分数的碳纤维的测量方向平行和垂直于纤维方向。将样品在293-573 K范围内热处理一次温度循环或在253 - 573 K范围内热处理三次。测得的CTE值进行了比较，与那些预测的著名Schapery模型和模型推导的Kural和最小。更好的协议实现了与复合材料的纵向CTE的预测。由于缺乏对碳纤维横向热膨胀系数的了解，横向热膨胀系数的预测更加困难。模型包括碳纤维的横向热膨胀系数（Kural-Min）的单向复合材料的横向热膨胀系数的预测给出了更好的结果。(C)1998由Elsevier Science Ltd.出版。保留所有权利。
Continuous carbon-fibre-reinforced copper-matrix composites prepared by diffusion bonding technology have been used for investigation of the coefficient of thermal expansion. For reasons of economy and ease of availability, continuous Torayca T300 fibres have been used for sample preparation. They were coated continuously with copper (galvanically and then chemically) and unidirectional composites were prepared by diffusion bonding in vacuum at 873 K for 30 min. The linear coefficient of thermal expansion (CTE) of samples with different volume fractions of carbon fibres was measured in directions parallel and perpendicular to the fibre direction. The samples were heat-treated for one temperature cycle in the range 293-573 K or cycled three times in a temperature range from 253 to 573 K. Measured CTE values are compared with those predicted by the well-known Schapery model and the model derived by Kural and Min. Better agreement was achieved with the predictions of the longitudinal CTE of the composite. Prediction of the transverse CTE was more difficult because of a lack of knowledge of the transverse CTE of carbon fibres. Models including the transverse CTE of carbon fibres (Kural-Min) gave better results for prediction of the transverse CTE of the unidirectional composite. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.