Solution combustion synthesis of Ni-Y_2O_3 nanocomposite powder  

溶液燃烧合成制备Ni-Y_2O_3纳米复合粉末(英文)

作　　者：刘烨[1] 秦明礼[1] 章林[1] 贾宝瑞[1] 曹知勤[2] 张德智[3] 曲选辉[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]攀枝花学院资源与环境工程学院,攀枝花617000 [3]航天材料及工艺研究所,北京100088

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第1期129-136,共8页中国有色金属学报（英文版）

基　　金：Project(2132046)supported by the Beijing Natural Science Foundation,China;Project(51104007)supported by the National Natural Science Foundation of China

摘　　要：Ni-Y2O3 nanocomposite powder with uniform distribution of fine oxide particles in the metal matrix was successfully fabricated via solution combustion process followed by hydrogen reduction. The combustion behavior was investigated by DTA-TG analysis. The influence of urea to nickel nitrate（U/Ni） ratio on the combustion behavior and morphology evolution of the combusted powder was investigated. The morphological characteristics and phase transformation of the combusted powder and the reduced powder were characterized by FESEM, TEM and XRD. The HRTEM image of Ni-Y2O3 nanocomposite powder indicated that Y2O3 particles with average particle size of about 10 nm dispersed uniformly in the nickel matrix.采用溶液燃烧合成和氢气还原两步法制备具有超细Y2O3弥散相的Ni-Y2O3纳米复合粉末。通过DTA-TG分析探讨燃烧机理,使用场发射扫描电镜、透射电镜和X射线衍射分析技术表征燃烧得到的粉末形貌和Ni-Y2O3纳米复合粉末的形貌和物相。详细讨论原料中硝酸镍与尿素配比对燃烧得到的粉末形貌、物相和比表面积的影响。高分辨透射形貌分析结果显示合成得到的Ni-Y2O3纳米复合粉末中均匀分布的Y2O3弥散相的尺寸在10 nm左右,并且在放电等离子烧结致密化后并未明显长大。

关 键 词：NANOCOMPOSITES NANOPARTICLES solution combustion synthesis oxide dispersion strengthening NI Y2O3 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TB383.3