Gasar多孔合金规则气孔形成的糊状区长度判据  

Critical Criteria of Mushy Zone Length for Regular Pore Forming in Gasar Porous Alloy

作　　者：宋群玲[1] 金青林[2] 

机构地区：[1]昆明冶金高等专科学校冶金材料学院 [2]昆明理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2016年第11期1134-1138,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51164018);云南省教育厅基金资助项目(2012Y337)

摘　　要：建立了规则气孔形成的糊状区长度与气泡尖端长度的理论模型,研究了合金的糊状区长度和凝固速率与Gasar多孔Cu-Cr合金的气孔结构的关系。结果表明,规则气孔形成时,糊状区长度和凝固速率均应有一适中的范围,给定凝固速率时,糊状区长度应小于气泡尖端长度。合金成分相同时,凝固速率v<vmax时,均能获得规则多孔结构。The critical criteria of mushy zone length and bubble tip length for formation of regular pore structure in Gasar porous alloyhave been deduced through theoretical analysis and calculation to understand effects of mushy zone length and solidification rate of alloy on pore structure of Gasar multi-pore Cu-Cr alloy.The results reveal that both mushy zone length and solidification rate should be controlled in a proper values.With a given solidification rate,the mushy zone length should be smaller than the bubble tip length,while with a given alloy composition,when the solidification rate vis less than vmax,porous structure Cu-Cr alloy can be prepared successfully.

关 键 词：糊状区长度 气泡尖端长度 规则多孔 凝固速率 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TB383.4[金属学及工艺—金属材料]