CAJ | 학술논문

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。
채용용액연소합성화경기환원량보법제비구유초세Y2O3미산상적Ni?Y2O3납미복합분말。통과DTA-TG분석탐토연소궤리，사용장발사소묘전경、투사전경화X사선연사분석기술표정연소득도적분말형모화Ni?Y2O3납미복합분말적형모화물상。상세토론원료중초산얼여뇨소배비대연소득도적분말형모、물상화비표면적적영향。고분변투사형모분석결과현시합성득도적Ni?Y2O3납미복합분말중균균분포적Y2O3미산상적척촌재10 nm좌우，병차재방전등리자소결치밀화후병미명현장대。
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.