Cu-Al系粉末压坯激光反应烧结研究  

A study on laser reaction sintering of Cu-Al system powder compacts

作　　者：郭作兴[1] 沈平[1] 胡建东[1] 王红颖[1] 

机构地区：[1]吉林大学材料科学与工程学院教育部汽车材料重点实验室,长春130025

出　　处：《激光技术》2005年第1期11-13,共3页Laser Technology

摘　　要：通过对烧结温度的变化过程、产物相的形成与转变、致密化行为、硬度特征等细致的研究和分析,揭示了Cu Al系粉末材料激光反应烧结的特性。结果表明,在激光输出功率 800W、持续作用时间为 16s的情况下,反应向试样的纵深方向发展,表现出剧烈、快速的蔓延燃烧特征,相的形成是在激光加热与反应阶段的短暂时间内完成。由于激光加热比常规电炉加热速度快,烧结试样均产生收缩,在Cu75Al25试样中出现了亚稳态马氏体(M)型Cu3Al相。Characteristics of Cu-Al powder alloys of reaction laser sintering are investigated by study on variation process of sintering temperature,transformation of product phase,densification behavior and hardness of samples.It is showed that under laser power 800W and irradiation time 16s,reaction of sample penetrates deeply,characterization of serious and rapid propagating sintering appers,and phases were formed within short time of reaction stage during laser heating.All of the samples shrinks,and metastable martensite(M) Cu 3Al is formed in Cu 75Al 25 alloy.

关 键 词：粉末冶金 蔓延燃烧 激光烧结 马氏体 

分 类 号：TG156.99[金属学及工艺—热处理]