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分别采用放电等离子烧结(SPS)与粉末冶金法两种方法制备TiZrNiCu高熵合金钎料箔，用于TC4合金的真空钎焊连接，对比研究了不同制备方法对TiZrNiCu高熵合金钎料的致密度及微观组织的影响，及其对钎焊接头界面微观组织结构及力学性能的作用。通过扫描电子显微镜(SEM)、能谱仪(EDS)分析了钎料合金及钎焊接头界面组织及物相成分，通过X射线衍射仪(XRD)分析确定钎料合金中存在的物相。研究结果显示：SPS制备的TiZrNiCu钎料合金致密度更高，可达99%以上，合金化程度更好。钎焊接头界面结构为TC4/α-Ti+(Ti,Zr)2(Cu,Ni)/β-Ti+(Ti,Zr)2(Cu,Ni)/α-Ti+(Ti,Zr)2(Cu,Ni)/TC4，而粉末冶金法TiZrNiCu钎料钎焊接头钎缝中心还存在α-Ti相。当钎焊温度1 000℃、保温时间30min时，SPS钎料钎焊接头的最大抗剪切强度达369.11MPa，而粉末冶金钎料钎焊接头为180.54MPa。
Abstract：TiZrNiCu high-entropy alloy(HEA)filler foils were prepared by Spark Plasma Sintering(SPS)and powder metallurgy(PM)methods,and then used to achieve vacuum brazing of TC4 alloy.The relative density and microstructure of the TiZrNiCu HEA fillers obtained by different preparation methods were compared,along with their impact on the interfacial microstructure and mechanical properties of the brazed joints.The microstructure and phase composition of the filler alloys and the brazed joint interfaces were analyzed using Scanning Electron Microscopy(SEM)and Energy Dispersive Spectroscopy(EDS).The phases present in the filler alloys were determined by X-ray Diffraction(XRD).The research results indicated that the SPS-prepared TiZrNiCu filler alloy exhibited higher relative density(over 99%)and a superior degree of alloying.The interfacial microstructure of the brazed joint was determined to be TC4/α-Ti+(Ti,Zr)2(Cu,Ni)/β-Ti+(Ti,Zr)2(Cu,Ni)/α-Ti+(Ti,Zr)2(Cu,Ni)/TC4.The joint brazed with the PM TiZrNiCu filler also containedα-Ti in the center of the brazing seam.The joint brazed with the SPS-sintered TiZrNiCu filler reached a maximum shear strength of 369.11 MPa at 1 000℃ for 30 minutes,significantly exceeding the 180.54 MPa obtained with the PM-prepared filler.
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基本信息:
DOI：10.16191/j.cnki.hbkx.2025.05.004
中图分类号:TG454
引用信息:
[1]宋蕊立,杨森,王文涛,等.不同方法制备的TiZrNiCu高熵合金钎料钎焊TC4合金性能的研究[J].河北省科学院学报,2025,42(05):27-33.DOI:10.16191/j.cnki.hbkx.2025.05.004.
基金信息:
河北省科学院科技计划博士科研启动项目（25B702）
