自蔓延高温合成Al/Mg_2Si复合材料的淬熄试验  

Quenching experiment of Al/Mg_2Si composite synthesized with high-temperature self-propagation

作　　者：周琦[1,2] 李福祥[1] 南雪丽[1] 高海棠[1] 孟倩[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2009年第3期1-3,共3页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(0803KJZA013)

摘　　要：采用燃烧波前沿淬熄法研究Al/Mg2Si复合材料在自蔓延高温合成(SHS)过程中的显微组织演变规律.用扫描电子显微镜观察和分析淬熄试样中的显微组织,通过XRD分析合成产物的相组成.研究结果表明,反应直接生成了Mg2Si而没有中间产物,Mg-Si可以在较低的温度下发生固-固反应生成Mg2Si;在淬熄合成过程中Al始终没有参与反应.The microstructural evolution pattern of Al/Mg2 Si composite during self-propagating high-temperature synthesis（SHS） was studied by means of combustion front quenching. The microstructures in the quenched sample was observed and analyzed with scanning electron microscope（SEM）, and the phase constituent of the synthesized product was inspected with X-ray diffraction（XRD）. The result showed that the synthesis of Mg2 Si was completed directly without intermediates, and the solid-solid reaction took place at lower temperatures; Al did not participate in the reaction during quenching process.

关 键 词：自蔓延高温合成 Al/Mg2Si复合材料 燃烧波前沿淬熄法 显微组织演变 

分 类 号：TG139.7[一般工业技术—材料科学与工程]