自蔓延法制取锰铝中间合金的实验  

Experiments on the preparation of Mn-Al master alloy by self-propagating high-temperature synthesis

作　　者：高家诚[1] 张延可[1] 李宁[1] 陈小华[1] 胡德[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第9期113-117,共5页Journal of Chongqing University

基　　金：国家高技术研究发展计划重点项目(2008AA031203);重庆大学研究生科技创新基金(CDJZR11130007)

摘　　要：首次将自蔓延高温合成法(self-propagating high-temperature synthesis,SHS)用于锰铝中间合金的制备。采用Miedema生成热模型、金属间化合物的双参数模型估算了锰铝中间合金的标准生成焓、标准熵及比热容。通过理论计算确定了Mn3O4-Mn2O3-CaO-Al反应体系的绝热温度。以Mn2O3、Mn3O4和CaO、金属Al为原料,进行了锰铝中间合金的自蔓延反应合成试验,采用化学滴定、X射线衍射以及光学显微镜的方法对产物进行分析。理论计算和实验结果表明:反应体系的绝热温度为3 160K,确定了该体系进行自蔓延反应的可行性。采用自蔓延合成法制备出了锰含量高达78%以上的锰铝中间合金,拓宽了锰铝中间合金的生产工艺。Self-propagating high-temperature synthesis（SHS） is applied to produce Mn-Al master alloy for the first time. The thermodynamic data of Mn-Al master alloy are estimated, and the adiabatic temperature is calculated by Miedema model and two-parameter model of intermetallics. The reaction product is investigated by using chemical titration optical microscope, X-ray diffraction analysis, in which Mn2O3, Mn3O4 and CaO are taken as raw materials and Al as a reductive agent. Theoretical calculation and experimental results show that the adiabatic temperature is 3 160 K,and the feasibility of the SHS reaction is determined consequently. methods of producing Mn-Al The content of manganese in master alloy is up to 78%, which broadens the master alloy in practice.

关 键 词：锰 自蔓延反应 金属间化合物 绝热温度 锰铝中间合金 

分 类 号：TG145[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]