High-strength diffusion bonding of oxide-dispersion-strengthened tungsten and CuCrZr alloy through surface nano-activation and Cu plating
High-strength diffusion bonding of oxide-dispersion-strengthened tungsten and CuCrZr alloy through surface nano-activation and Cu plating
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DOI：
10.1016/j.jmst.2021.03.040
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发表时间：
2021-05
影响因子：
10.9
通讯作者：
Yuanyuan Chen;Yuan Huang;Fei Li;Luoli Han;D. Liu;L. Luo;Zongqing Ma;Yong-chang Liu;Zumin Wang
中科院分区：
文献类型：
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作者：
Yuanyuan Chen;Yuan Huang;Fei Li;Luoli Han;D. Liu;L. Luo;Zongqing Ma;Yong-chang Liu;Zumin Wang
氧化物弥散强化钨（ODS-W）和CuCrZr合金通过三步工艺连接：（i）表面纳米活化，（ii）镀铜后退火，和（iii）扩散连接。采用X射线衍射、扫描电镜、能谱仪和高分辨透射电镜等分析手段，研究了ODS-W和ODS-W/CuCrZr接头界面的形貌和结构演变。ODS-W经表面纳米活化后，得到了平均孔径约为100 nm的纳米多孔结构，其中的Y2 O3颗粒保持不变。经镀铜和退火处理后，表面纳米活化的ODS-W与Cu镀层结合紧密。经过三步反应后，在ODS-W与Cu的界面处形成了纳米W颗粒镶嵌的相互作用层。结果表明，ODS-W/Cu和ODS-W/Y2 O3/Cu界面结合良好。ODS-W/CuCrZr接头具有较高的剪切强度（高达201 MPa）和有效结合面积比（>98%）。ODS-W和CuCrZr合金之间开发的三步键合工艺为核聚变反应堆应用中的未来等离子体组件提供了有效的支持。
Oxide-dispersion-strengthened tungsten (ODS-W) and a CuCrZr alloy were bonded by a three-step process: (i) surface nano-activation, (ii) copper plating followed by annealing, and (iii) diffusion bonding. The morphological and structural evolutions of ODS-W and the interface of the ODS-W/CuCrZr joint during these processes have been thoroughly studied by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry, and high-resolution transmission electron microscopy. After surface nano-activation, a nanoporous structure of ODS-W with an average pore size of ~100 nm was obtained, and the Y2O3particles therein remained unchanged. A Cu coating was tightly bonded with the surface nano-activated ODS-W after Cu plating and annealing. An interaction layer embedded with nanosized W particles was formed at the interface between ODS-W and plated Cu after the three-step process. Consequently, well-cohesive ODS-W/Cu and ODS-W/Y2O3/Cu interfaces were formed. The ODS-W/CuCrZr joint showed high shear strengths (up to 201 MPa) and effective bonded area ratios (>98%). The developed three-step bonding process between ODS-W and the CuCrZr alloy provides an effective support for future plasma-facing components in nuclear fusion reactor applications.