Research on the dynamic compressive properties of Cu-Co-W alloys with different Co contents

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-02-26 DOI:10.1016/j.vacuum.2025.114183

Zengye Ning , Xiuqing Li , Qingxia Yang , Shizhong Wei , Jingkun Liang , Tianyao Guo , Jie Wu , Xinyu Zhang , Haiyang Pei , Liangdong Chen , Huijie Liu , Dan Jia , Longwei Zhou

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引用次数: 0

Abstract

Within this paper, Cu-Co-W alloys with distinct Co concentrations were synthesized through mechanical alloying in conjunction with vacuum spark plasma sintering (SPS). The microstructural features, grain size parameters, and orientation characteristics of the alloy samples were analyzed via field-emission electron microscopy (FESEM), transmission electron microscopy (TEM), and electron backscatter diffraction (EBSD). The dynamic compressive properties of the alloys were tested by means of a Hopkinson pressure bar device. The phase composition, grain boundaries and geometrically necessary dislocation density of the dynamically compressed specimens were analyzed via EBSD. The research results show that during the sintering process, atomic diffusion occurs among Co and W, as well as W and Cu, generating solid solutions, namely Co_0.9W_0.1 and Cu_0.4W_0.6. Adding Co to Cu-W alloy can improve its density and refine the matrix grains. Meanwhile, the addition of Co can effectively improve the dynamic compression performance of Cu-W alloy. When the Co addition amount is 2 at%, an optimal balance of strengthening effects within different compression rate ranges can be achieved. The relevant mechanisms have also been studied and revealed.

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本文通过机械合金化结合真空火花等离子烧结（SPS）合成了不同 Co 浓度的铜-铜-W 合金。通过场发射电子显微镜（FESEM）、透射电子显微镜（TEM）和电子反向散射衍射（EBSD）分析了合金样品的微观结构特征、晶粒尺寸参数和取向特性。通过霍普金森压杆装置测试了合金的动态抗压性能。通过 EBSD 分析了动态压缩试样的相组成、晶界和必要的几何位错密度。研究结果表明，在烧结过程中，Co 和 W 以及 W 和 Cu 之间会发生原子扩散，产生固溶体，即 Co0.9W0.1 和 Cu0.4W0.6。在 Cu-W 合金中添加 Co 可提高其密度并细化基体晶粒。同时，Co 的加入还能有效改善 Cu-W 合金的动态压缩性能。当 Co 的添加量为 2% 时，可在不同压缩率范围内实现强化效果的最佳平衡。研究还揭示了相关机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.