采用溶胶-球磨法制备 W-10Cu、W-20Cu 复合粉末,研究了球磨工艺对粉末粒度、形貌和烧结性能的影响。研究结果表明,球磨粉末呈现双峰粒度分布,球磨20h的W-10Cu、W-20Cu粉末的粒度分别为1.03和1.15μm。球磨过程中,粉末比表面积变换式 ln [(Sm-S0)/(Sm-S)]与球磨时间t 符合线性关系。W-10Cu、W-20Cu 复合粉末球磨20h,可以在1380℃一步液相烧结达到近全致密,显微组织细小且均匀。
In this study,W-10Cu/W-20Cu composite powders were fabricated by sol-spray drying and ball mill-ing.The particle sizes and morphology of the composite powders were tested,the densification behave was studied.The results show that a new peak appeared after milling.After 20 hours ball milling,particle sizes of W-10Cu/W-20Cu were 1.03 and 1.15μm,respectively.The derivation of specific surface area ln[(Sm-S0 )/(Sm-S)]and milling time t match linear relationship.When sintered directly at 1380℃ after 20h milling,W-10Cu/W-20Cu composites had a uniform composition distribution and fine grain sizes,which approached to full density.
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