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采用Zr65Cu35和Nb双靶直流共溅射方法,通过调节Nb靶的溅射功率,制备了不同Nb含量的Zr Cu Nb非晶薄膜。分别使用能谱仪、X射线衍射仪、高分辨透射电子显微镜观察Zr Cu Nb非晶薄膜的成分与结构,最终选择具有优异非晶形成能力的Zr53Cu38Nb9成分溅射到纯Zr基片上,以制备锆基非晶复合材料。研究测试Zr53Cu38Nb9非晶复合材料的力学性能与耐腐蚀性能。结果表明:与纯Zr基片相比,复合材料在弹性阶段力学性能无明显差异;而在塑性变形阶段,由于非晶薄膜与纯Zr基片的变形与断裂机制不同,该复合材料具有更好的拉伸塑性,其表现为非晶膜厚为280 nm、640 nm和960 nm的复合材料的最大拉伸塑性形变较纯Zr基片分别提高了2.72%、5.22%、4.27%;在耐腐蚀性能方面,非晶膜厚为640 nm的复合材料与纯Zr基片相比,具有较小的自腐蚀电流密度icorr、较正的腐蚀电位Ecorr以及较大的容抗弧半径,表现出更优异的耐腐蚀能力。因此,该新型Zr基复合材料在核材料领域具有潜在的应用。
Zr Zr Nb Nb amorphous thin films with different Nb contents were prepared by adjusting the sputtering power of Nb targets by Zr65Cu35 and Nb dual target DC co-sputtering method. The composition and structure of the amorphous Zr Cu Nb thin films were observed by energy dispersive spectroscopy, X-ray diffraction and high-resolution transmission electron microscopy, respectively. Finally, Zr53Cu38Nb9 with excellent amorphous formation ability was sputtered onto pure Zr substrate to prepare zirconium Based amorphous composite materials. Study the mechanical properties and corrosion resistance of Zr53Cu38Nb9 amorphous composites. The results show that there is no significant difference in the mechanical properties of the composites during the elastic phase compared with that of the pure Zr matrix. In the plastic deformation phase, the composites have better mechanical properties due to the different deformation and fracture mechanisms of the amorphous and pure Zr films The tensile plasticity of the composites with non-crystallized film thickness of 280 nm, 640 nm and 960 nm increased by 2.72%, 5.22% and 4.27% In terms of performance, the composite material with an amorphous film thickness of 640 nm shows a better performance than the pure Zr film with a smaller self-corrosion current density icorr, a more positive corrosion potential Ecorr and a larger capacitive arc radius Corrosion resistance. Therefore, the new Zr-based composites have potential applications in the field of nuclear materials.