کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7989860 | 1515947 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and properties of the W-Cu composites reinforced with uncoated and nickel-coated tungsten fibers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fabrication and properties of the W-Cu composites reinforced with uncoated and nickel-coated tungsten fibers Fabrication and properties of the W-Cu composites reinforced with uncoated and nickel-coated tungsten fibers](/preview/png/7989860.png)
چکیده انگلیسی
In this work, novel high-voltage electrical contacts of the W-Cu composites reinforced with tungsten fibers (Wf) have been fabricated by hot-press sintering and infiltration processes. Considering microstructural homogeneity and fabrication repeatability of the composites, Wf with the content of 3.3 wt% was determined to be optimum for the reinforcement. By electroless deposition of ~ 2.5 μm thick nickel layer onto the surface of Wf, the connectivity between the Wf and its neighboring W-Cu matrix after sintering and infiltration was improved with the elimination of porosity. This was considered to be ascribed to the plastic deformation of Ni-coatings during the molding of green compacts and the improvement of rearrangement of tungsten particles (Wp) during the Ni-activated sintering. Compared with the traditional commercial W-Cu composites, the W-Cu composite reinforced with the Ni-coated Wf provided desirable increased tensile strength by ~ 15.8% and improved electrical breakdown strength by 65.3% after the interface tuning, which is applicable and transferrable to other refractory metals for property improvement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 71, February 2018, Pages 175-180
Journal: International Journal of Refractory Metals and Hard Materials - Volume 71, February 2018, Pages 175-180
نویسندگان
Longchao Zhuo, Yiheng Zhang, Qiuyu Chen, Shuhua Liang, Long Chen, Juntao Zou,