工程科学学报，第37卷，第2期：219-224,2015年2月 Chinese Journal of Engineering,Vol.37,No.2:219-224,February 2015 DOI:10.13374/j.issn2095-9389.2015.02.013:http://journals.ustb.edu.cn Fe-Sialon复合材料中Fe3Si合成热力学分析及实验 验证 郝洪顺区，苏青”，连芳》，郭伟华”，新闪闪”，刘贵山”，高文元” 1)大连工业大学新材料与材料改性省高校重点实验室，大连1160342)北京科技大学材料科学与工程学院，北京100083 ☒通信作者，E-mail:beikel952@163.com 摘要对淤泥沙原料中FeO4及其中间产物F0和Fe可能参与的反应进行了热力学分析.结合绘制的不同CO分压下 FeSi体系在C和SiO2过量下的优势区相图及FeO-N体系热力学参数状态图，得出体系中Fe元素最终以Fe,Si形式存在， 为淤泥沙合成O'Sialon-SiC--fe,Si(即Fe-Sialon)复合材料提供了热力学理论依据.在热力学分析的基础上，以淤泥沙为主 要原料，采用碳热还原氮化法制备了Fe-Sialon复合材料，并借助X射线衍射仪和扫描电子显微镜对烧结体的物相和显微形 貌进行了表征，得出产物的主品相为0'Sialon,还含有少量的SiC和Fe,Si相，晶粒呈现为纤维状、絮状或短柱状，与热力学分 析结果(Fe元素最终以Fe,Si存在)吻合. 关键词复合材料：铁；Sialon:热力学分析；碳热还原：氮化：实验验证 分类号TB333 Thermodynamic analysis and experimental confirmation of Fe Si synthesis in Fe-Sialon composites HAO Hong-shun',SU Qing”,AN Fang”,GU0Wei-hua”,JIN Shan-shan',LIU Gui-shan'',GA0 Wen-yuan” 1)Liaoning Provincial College Key Laboratory of New Materials and Material Modification,Dalian Polytechnic University,Dalian 116034,China 2)School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:beikel952@163.com ABSTRACT A thermodynamic analysis was performed on possible reactions of Fe,O in sediment material,intermediate product Fe0,Fe,and other matters.In combination with the predominant area phase diagram of the Fe-Si system under different carbon mon- oxide partial pressures and excess carbon and silicon dioxide as well as the thermodynamic parameter state diagram of the Fe-O-N sys- tem,it is found that Fe finally exists in the form of Fe Si,which provides a thermodynamic theoretical basis for using sediment to syn- thesize O'-Sialon-SiC-FeSi (Fe-Sialon)composites.These Fe-Sialon matrix composites made from sediment were prepared by car- bothermal reduction-nitridation on the basis of thermodynamic analysis.X-ray diffraction and scanning electron microscopy results in- dicate that plentiful O'-Sialon phase and a small quantity of SiC and Fe,Si phases appear in samples,and the crystalline grains are fi- bercottonor short column-shaped,which is consistent with thermodynamic analysis results. KEY WORDS composite materials;iron:Sialon:thermodynamic analysis;carbothermal reduction:nitridation:experimental con- firmation 收稿日期：2013-10-06 基金项目：国家科技支撑计划资助项目(2011BAB03B05):住房和城乡建设部科学技术计划资助项目(2013-K48):辽宁省教有厅科技研究 项目(L2011078)工程科学学报，第 37 卷，第 2 期: 219--224，2015 年 2 月 Chinese Journal of Engineering，Vol． 37，No． 2: 219--224，February 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 02． 013; http: / /journals． ustb． edu． cn Fe--Sialon 复合材 料 中 Fe3 Si 合成热力学分析及实验 验证 郝洪顺1) ，苏 青1) ，连 芳2) ，郭伟华1) ，靳闪闪1) ，刘贵山1) ，高文元1) 1) 大连工业大学新材料与材料改性省高校重点实验室，大连 116034 2) 北京科技大学材料科学与工程学院，北京 100083  通信作者，E-mail: beike1952@ 163． com 摘 要 对淤泥沙原料中 Fe3O4及其中间产物 FeO 和 Fe 可能参与的反应进行了热力学分析． 结合绘制的不同 CO 分压下 Fe--Si 体系在 C 和 SiO2过量下的优势区相图及 Fe--O--N 体系热力学参数状态图，得出体系中 Fe 元素最终以 Fe3 Si 形式存在， 为淤泥沙合成 O'-Sialon--SiC--Fe3 Si ( 即 Fe--Sialon) 复合材料提供了热力学理论依据． 在热力学分析的基础上，以淤泥沙为主 要原料，采用碳热还原氮化法制备了 Fe--Sialon 复合材料，并借助 X 射线衍射仪和扫描电子显微镜对烧结体的物相和显微形 貌进行了表征，得出产物的主晶相为 O'-Sialon，还含有少量的 SiC 和 Fe3 Si 相，晶粒呈现为纤维状、絮状或短柱状，与热力学分 析结果( Fe 元素最终以 Fe3 Si 存在) 吻合． 关键词 复合材料; 铁; Sialon; 热力学分析; 碳热还原; 氮化; 实验验证 分类号 TB333 Thermodynamic analysis and experimental confirmation of Fe3 Si synthesis in Fe--Sialon composites HAO Hong-shun1)  ，SU Qing1) ，LIAN Fang2) ，GUO Wei-hua1) ，JIN Shan-shan1) ，LIU Gui-shan1) ，GAO Wen-yuan1) 1) Liaoning Provincial College Key Laboratory of New Materials and Material Modification，Dalian Polytechnic University，Dalian 116034，China 2) School of Materials Science and Engineering，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: beike1952@ 163． com ABSTＲACT A thermodynamic analysis was performed on possible reactions of Fe3O4 in sediment material，intermediate product FeO，Fe，and other matters． In combination with the predominant area phase diagram of the Fe--Si system under different carbon mon￾oxide partial pressures and excess carbon and silicon dioxide as well as the thermodynamic parameter state diagram of the Fe--O--N sys￾tem，it is found that Fe finally exists in the form of Fe3 Si，which provides a thermodynamic theoretical basis for using sediment to syn￾thesize O'-Sialon--SiC--Fe3 Si ( Fe--Sialon) composites． These Fe--Sialon matrix composites made from sediment were prepared by car￾bothermal reduction--nitridation on the basis of thermodynamic analysis． X-ray diffraction and scanning electron microscopy results in￾dicate that plentiful O'-Sialon phase and a small quantity of SiC and Fe3 Si phases appear in samples，and the crystalline grains are fi￾ber-，cotton-，or short column-shaped，which is consistent with thermodynamic analysis results． KEY WOＲDS composite materials; iron; Sialon; thermodynamic analysis; carbothermal reduction; nitridation; experimental con￾firmation 收稿日期: 2013--10--06 基金项目: 国家科技支撑计划资助项目( 2011BAB03B05) ; 住房和城乡建设部科学技术计划资助项目( 2013--K4--8) ; 辽宁省教育厅科技研究 项目( L2011078) ．