Experiment and Simulation for Rolling of Diamond–Cu Composites
Experiment and Simulation for Rolling of Diamond–Cu Composites
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DOI：
10.1007/s40195-017-0561-z
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
Yun Wang;Kaikun Wang;Yu-wei Wang;Guangming Li
中科院分区：
文献类型：
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作者：
Yun Wang;Kaikun Wang;Yu-wei Wang;Guangming Li
我们展示了一种创新的金刚石/铜复合材料的制备方法粉末管技术和滚动。在小铜管中分别装入镀钛和镀铜金刚石颗粒，然后通过复合轧制将金刚石颗粒与铜基体复合。用扫描电镜和能谱仪分析了金刚石与铜的界面形貌和元素分布。利用DEFORM-3D软件对轧制过程进行了有限元模拟，并结合实验进行了分析。实验结果表明，金刚石颗粒在复合材料的中心层分布均匀。对比实验表明，金刚石粒度为0.12- 0.15mm，预轧厚度为1.2mm的样品形貌比较完整，分布比较均匀。实验结果表明，过量压下效果不佳。通过理论计算，复合材料的热导率约为453 W（m K）-1。在有限元模拟方面，采用DEFORM-3D软件对复合材料的轧制变形和温度场进行了模拟。对仿真结果进行了解释，数值结果验证了模型的可靠性。模拟预测，大应变的局部区域，指示沿沿着方向的应变，可以通过添加金刚石颗粒来加强。
We demonstrate an innovative preparation approach of diamond/Cu composites by powder-in-tube technique and rolling. A small copper tube was loaded with Ti- and Cu-coated diamond particles, and then the diamond particles were combined with Cu matrix by composite rolling. The morphology and element distribution of the interface between diamond and Cu were determined by scanning electron microscopy and energy-dispersive spectrometer. Finite element method (FEM) simulation was used to analyze the rolling process associated with experiment by DEFORM-3D. The final experimental results showed that homogeneous distribution of diamond particles could be observed in the center layer of the composites. According to the contrast experiments, the sample, whose diamond particle size is 0.12–0.15 mm and thickness of pre-rolling is 1.2 mm, showed relatively complete morphologies and homogeneous distribution. Experimental results indicated a poor efficacy of excessive rolling reduction. The thermal conductivity of the composites is about 453 W (m K)−1by theoretical calculation. For FEM simulation, rolling strain and temperature field of the composites were simulated by DEFORM-3D. Simulation results were interpreted, and numerical results verified the reliability of the model. The simulation predicted that the local area of large strain, indicative of the strain along the thickness direction, could be intensified by adding diamond particles.