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Fe_2(MoO_4)_3/Si_3N_4复合粉末还原及热压微观组织结构分析 被引量：5

Microstructure of Fe_2(MoO_4)_3/Si_3N_4 composite powders by reduction and hot pressing
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摘要 以α-Si3N4,Fe（NO3）3.9H2O和NH4Mo7O24.4H2O为原料,采用非均相沉淀法制备Fe2（MoO4）3/Si3N4复合粉末,采用氢气还原与热压法获得Fe-Mo/Si3N4复合粉末与烧结体,采用X线衍射仪（XRD）、电子能谱（EDS）、电镜扫描（SEM）和电镜透射（TEM）等方法对Fe-Mo/Si3N4复合粉末与烧结体物相、成分及微结构进行观察与分析。分析结果表明：Fe-Mo/Si3N4复合粉末主要成分为α-Si3N4,Mo,Si和Fe-Mo氮化物（Fe6Mo7N2和Fe3Mo3N）,其中Mo颗粒长大;粒径为4~7μm的Mo5Si3大颗粒均匀镶嵌在Si3N4,Fe-Mo氮化物（Fe6Mo7N2和Fe3Mo3N）及SiO2的混合物组成的粒径为1μm左右的小颗粒之中。 Fe2（MoO4）3/Si3N4 was prepared by heterogeneous precipitation-thermal reduction method using α-Si3N4,Fe（NO3）3.9H2O and NH4Mo7O24.4H2O as raw material,then through reducing by hydrogen and hot pressed,Fe-Mo/Si3N4 composite powder and its sintering body were obtained.Their phases,composition and microstructure were observed and analyzed by XRD,EDS,SEM and TEM.The results show that the Fe-Mo/Si3N4 composite powder consists of α-Si3N4,Mo,Si and Fe-Mo nitride（Fe6Mo7N2,Fe3Mo3N）,in which Mo particle grows,while large Mo particles with size of 4-7 μm are embedded into those small particles composed of Si3N4 and Fe-Mo nitride（Fe6Mo7N2 and Fe3Mo3N） and SiO2 in the microcosmic fracture of Fe-Mo/Si3N4 cermet.
作者 银锐明 范景莲 钟定铭 刘勋 张曙光
机构地区 湖南工业大学冶金工程学院 中南大学粉末冶金国家重点实验室
出处 《中南大学学报（自然科学版）》 EI CAS CSCD 北大核心 2011年第4期909-914,共6页 Journal of Central South University:Science and Technology
基金 国家自然科学青年基金资助项目(50804016) 湖南省教育厅科研项目(02C659) 长沙市科技计划重点项目(K1005168-11)
关键词 原位反应 SI3N4 MO5SI3 非均相沉淀-热还原 in-situ reaction Si3N4 Mo5Si3 heterogeneous precipitation-thermal reduction
分类号 TB333 [一般工业技术—材料科学与工程]
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参考文献14

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二级参考文献15

共引文献38

同被引文献53

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引证文献5

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中南大学学报（自然科学版）
2011年 第4期

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