Arc erosion behavior of TiB2/Cu composites

被引：0
|
作者：
Li G. [1 ,2 ]
Liu Y. [1 ,3 ]
Guo X. [2 ,3 ]
Feng J. [1 ,2 ]
Song K. [1 ,3 ]
Tian B. [1 ,3 ]
机构：
[1] School of Materials Science and Engineering, He'nan University of Science and Technology, Luoyang
[2] He'nan Key Laboratory of Non-Ferrous Materials Science and Processing Technology, Luoyang
[3] Collaborative Innovation Center of Nonferrous Metals, He'nan Province, Luoyang
来源：
Liu, Yong (liuyong@haust.edu.cn.) | 2018年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 35期
关键词：
Arc duration; Arc erosion; Composites; Material transfer; Spark plasma sintering; TiB[!sub]2[!/sub]/Cu;
D O I：
10.13801/j.cnki.fhclxb.20170531.003
中图分类号：
学科分类号：
摘要：
The TiB2/Cu composites with TiB2 mass fraction of 1wt%-5wt% were prepared by spark plasma sintering (SPS), and the electrical conductivity and hardness were tested. The electrical conductivity of TiB2/Cu composites decreases from 96.9% (International Annealed Copper Standard, IACS) to 65.1%(IACS) with TiB2 mass fraction increasing from 0 to 5wt%, while the Brinell hardness increases from 42.8 to 65.2. To discuss the effect of TiB2 content and current on TiB2/Cu composites arc erosion, the electrical contact tests were performed at 24 V and different direct current for TiB2/Cu composites with the different TiB2 mass fractions. For TiB2/Cu composites with different TiB2 mass fraction, the average arc duration, average arc energy and mass loss increase with the increase of current. The cathode of TiB2/Cu composites mass loss more than that of the anode. In general, the TiB2/Cu composites are transferred from cathode to anode. At 24 V and 25 A, the arc duration and arc energy of TiB2/Cu composites with different TiB2 mass fractions are fluctuant with the increase of operation times. On the whole, it shows a tendency to increase gradually. The 3wt% TiB2/Cu composite has higher stability, the average arc duration and average arc energy are lower than the others. With the increase of mass fraction of TiB2, TiB2/Cu composites present less mass loss and shallower arc erosion pits. © 2018, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：616 / 622
页数：6
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