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《Materials for Mechanical Engineering》 2010-01
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Effect of Superheat on Particle Morphology of Atomized Sn3Ag2.8Cu Alloy Powders

XU Tian-han,WANG Dang-hui(College of Materials Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China)  
To accelerate the lead-free process in the electronic industry in our country,the effect of superheat condition on morphology of the Sn3Ag2.8Cu alloy lead-free solder powder particles was studied by using self-designed supersonic atomization device.The results show that the proportion of the satellite particles and special shaped particles could be controlled through adjusting the superheat condition for the alloy.Under 150 ℃ superheat condition,the proportion of the satellite particles and special shaped particles were the least,and the sphericity of the particles was optimal.And the sphericity of the particles was worse under 100 ℃ superheat condition.There were more satellite particles and flake particles in the atomized powders under 250 ℃ superheat condition.
【Fund】: 西安石油大学材料加工工程重点学科资助项目;; 西安石油大学青年基金资助项目(2005-47)
【CateGory Index】: TG425.1
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