航空学报 > 2007, Vol. 28 Issue (1): 222-227

粉体特性对铜基金属粉末选区激光烧结的影响

顾冬冬,沈以赴   

  1. 南京航空航天大学 材料科学与工程系
  • 收稿日期:2005-10-08 修回日期:2006-03-06 出版日期:2007-01-10 发布日期:2007-01-10
  • 通讯作者: 沈以赴

Effects of Powder Characteristics on Selective Laser Sintering of Copper-based Metal Powder

GU Dong-dong,SHEN Yi-fu   

  1. Department of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics
  • Received:2005-10-08 Revised:2006-03-06 Online:2007-01-10 Published:2007-01-10
  • Contact: SHEN Yi-fu

摘要:

设计制备了多组分铜基金属粉末(组分包括Cu,Cu-10Sn,Cu-8.4P),并基于液相烧结机制实现了粉体激光烧结成形。研究了粉体特性(粉末粒度、颗粒形貌、化学成分、组分比例、及混粉均匀性)对烧结致密度及显微组织的影响。结果表明,粗细粉末共混,并使其具有较宽粒度分布;使用球形或近球形细粉,均能提高粉末松装密度及烧结致密度。元素P能充当脱氧剂而改善润湿性;但若CuP含量多于15%质量分数,会因生成过多磷渣而降低烧结性。提高粘结金属CuSn比例能使烧结致密度得以改善;但若其含量超过30%质量分数,则会导致“球化”效应。提高混粉均匀性,有利于改善烧结致密度和组织均匀性。

关键词: 粉末冶金, 选区激光烧结, 铜基金属粉末, 液相烧结,

Abstract:

A multi-component copper-based metal powder, which consists of Cu, Cu-10Sn, and Cu-8.4P, is developed. Selective laser sintering of this powder system is processed through the mechanism of liquid phase sintering. The effects of powder characteristics such as particle shape, size distribution, chemical composition, component ratio, and dispersion homogeneity on the densification and the resultant microstructures are investigated.

Key words: powder , metallurgy,  , selective , laser , sintering,  , copper-based , metal , powder,  , liquid , phase , sintering,  , phosphorus

中图分类号: