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Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly
2023 Vol.24 No.3 P.206-225
Progress in research on nanoprecipitates in high-strength conductive copper alloys: a review
Abstract: High-strength conductive Cu alloys play an essential role in high-speed railways, 5G networks, and power transmission. The compound precipitates of alloying elements such as Cr, Zr, Fe, and Si in Cu alloys significantly regulate the microstructure and properties of these alloys. They can ensure that the alloys have high strength without damaging conductivity seriously, which is usually a difficult problem in the development of Cu alloys. This paper systematically expounds on the microstructure and concerned factors of compound precipitates in high-strength conductive Cu alloys such as Cu-Cr-Zr, Cu-Zr, Cu-Ni-Si, and Cu-Fe-P. In particular, factors affecting the precipitates are summarized from the perspectives of composition and process to guide the regulation of properties. Some new, promising, high-performance Cu alloys, including Cu-Co-Si, Cu-Co-Ti, and Cu-Fe-Ti, are described. Finally, we look at the research prospects for precipitation-strengthened Cu alloys.
Key words: Cu alloys; Compound precipitate; Strength; Conductivity
西安电子科技大学微电子学院，中国西安市，710071
摘要：文章提出一种应用于 X 频段和 Ku 频段卫星无线通信的带有滤波效应的新型宽带圆极化天线。该结构包含一个驱动层（同时也是滤波层）以及一个堆叠层（同时也是圆极化层）。带通滤波响应中的两个辐射零点，是衬底集成波导（SIW）腔体支持的开口与嵌入式驱动贴片的综合效果。引入倒角贴片作为堆叠元件，具有同时实现圆极化和拓宽工作带宽的能力。使用多层印制电路板（PCB）工艺制作了一个尺寸为 0.8λ0×0.71λ0×0.16λ0 的紧凑原型进行演示。实验结果与仿真结果吻合良好，测量的 −10-dB 阻抗带宽和 3-dB 轴比带宽分别为10.83% 和 15.54%。此外，还获得了 8.9 dBic 的左旋圆极化峰值增益，大于 7 dBic 的带内平均左旋圆极化增益，以及良好的频率选择性。
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DOI:
10.1631/jzus.A2200398
CLC number:
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On-line Access:
2024-08-27
Received:
2023-10-17
Revision Accepted:
2024-05-08
Crosschecked:
2023-03-17