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马超力,薛松柏,王博,龙伟民,钟素娟.Ga和Ce复合添加对低银无镉钎料组织及性能的影响[J].稀有金属材料与工程(英文),2019,48(1):91~96.[Ma Chaoli,XueSongbai,Wang Bo,Long Weimin and Zhong Sujuan.Effects of Ga and Ce on the Microstructure and Properties of Cadmium-free Silver Filler Metals[J].Rare Metal Materials and Engineering,2019,48(1):91~96.]
Effects of Ga and Ce on the Microstructure and Properties of Cadmium-free Silver Filler Metals
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Received:July 16, 2017  Revised:September 13, 2017
DOI:
Key words: low-silver brazing filler metal, microstructure, rare earth element, shear strength
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目);江苏高校优势学科建设 工程资助项目。
Author NameAffiliation
Ma Chaoli,XueSongbai,Wang Bo,Long Weimin and Zhong Sujuan  
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Abstract:
      Effects of Ga and Ce additions on the microstructures and mechanical properties of Ag17CuZnSn-xGa-yCe filler metals and brazed joint were investigated by microscopy method and tensile test. The results indicated that the solidus and liquidus temperatures of filler metals decreased with addition of Ga and Ce. And the wettability of filler metals on the brass and stainless steel improved when the content of Ga and Ce are 2 wt. % and 0.15 wt.%. The highest shear strength of brazed joint was 3% higher than the shear strength of the Ag17CuZnSn-2Ga. During brazing process, Ga has a higher diffusion coefficient into stainless steel than that of other elements. A novel Ce20(Ag, Cu)40Sn40 intermetallic phase was found in filler metal when the content of Ce is higher than 0.3 wt.%.