AL_(87)Ce_3Ni_(10-x)Cu_x(x=0,1,3,5)纳米非晶复合材料的显微结构及性能研究  

Study on the microstructure and the property of Al_(87)Ce_3Ni_(10-x)Cu_x(x=0,1,3,5) nanophase-amorphous composites

作　　者：张宏伟 吕毓松[1] 阚家德[1] 杨宇[1] 

机构地区：[1]云南大学材料科学与工程系

出　　处：《云南大学学报（自然科学版）》2005年第1期52-56,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省自然科学基金资助项目(2000E0016M).

摘　　要：单辊快凝Al87Ce3Ni10-xCux(x=0,1,3,5)非晶合金在180,200,220,240℃进行20min等时退火,制成纳米复合结构.测量了各个合金的显微硬度.用X射线衍射(XRD)、透射电镜(TEM)和差示扫描量热(DSC)技术研究了显微结构、晶粒尺寸、体积分数、热稳定性、硬度与合金成分和退火温度的关系.结果表明:随Cu摩尔分数的增加,α-Al晶粒尺寸减小,晶粒细化使显微硬度增高,随Cu摩尔分数的增加,α-Al析出温度向低温移动,有利于α-Al晶粒的析出过程.Nanophase-amorphous composites have been prepared by melt-spun Al_(87)Ce_3Ni_(10-x)Cu_x(x=0,1,3,5) amorphous alloys annealed at 180,200,220℃ and 240℃ for 20min.The microhardness of nanophase amorphous composites were examined.have been investigated by X-ray diffractometry (XRD),transmission electron microscopy(TEM) and differential scanning calorimetry(DSC) The changes in the microstructure,the particle size,the volume fraction of α-Al phase,thermal stability and the microhardness as a function of alloy compositions and annealing temperatures.The present results indicate that the measures of Al particles decrease with increasing Cu content.The refinement of the nanoscale α-Al particles results in increase in the microhardness.The onset temperatures of precipitation of the α-Al phase shift to a lower temperature side with increasing Cu content.

关 键 词：析出 显微硬度 晶粒尺寸 晶粒细化 非晶合金 显微结构 快凝 摩尔分数 性能研究 纳米 

分 类 号：TG146[一般工业技术—材料科学与工程] TG142[金属学及工艺—金属材料]