ZrN–Si_3N_4–Y_2O_3复合材料的相组成（英文）  

Phase Composition of Zr N–Si_3N_4–Y_2O_3 Composite Material

作　　者：陆有军[1] 淮晓晨 吴澜尔[1] 黄振坤[1] 王燕民[2] 

机构地区：[1]北方民族大学材料科学与工程学院,银川750021 [2]华南理工大学材料科学与工程学院,广州510640

出　　处：《硅酸盐学报》2015年第12期1742-1746,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50962001);宁夏科技支撑计划(2014);北方民族大学外国专家项目(2012);北方民族大学粉体材料与特种陶瓷重点实验室项目(2013)资助

摘　　要：采用不同组分的Zr N、Si_3N_4和Y_2O_3混合粉末,在1 750℃高温固相反应合成Zr N–Si_3N_4–Y_2O_3复合材料,借助于X射线衍射仪表征6种按不同比例混合样品的物相组成。结果表明:在Zr N–Si_3N_4–Y_2O_3三元系统中,Zr N分别与Si_3N_4、Y_2O_3和Y2Si3O3N4(M相,黄长石结构)共存;M相为Si_3N_4和Y_2O_3在摩尔比为1:1时的产物,Zr N–Si_3N_4–Y_2O_3三元系统扩展为Zr N–Si_3N_4–Y_2O_3–Si O2四元系统,在该四元系统中,Zr N分别与M相、Y4Si2N2O7(J相,单斜Y4Al2O9结构)及Y5(Si O4)3N(H相,磷灰石结构)3种含钇硅酸盐及Si_3N_4、Y_2O_3共存。其中,J相和H相分别是Si2N2O(Si_3N_4和Si O2在摩尔比为1:1时的产物)和Y_2O_3在摩尔比分别为2:1和9:5时的产物。用Zr N–Si_3N_4–Y_2O_3体系相图可解析制备Zr N陶瓷和Zr N/Si_3N_4复合陶瓷的相组成。The phase composition of ZrN–Si3N4–Y2O3 composite material synthesized with ZrN, Si3N4 and Y2O3 powders via thesolid-state reaction at 1 750 ℃ was analyzed. The samples mixed at different mix ratios and synthesized were characterized by X-raydiffraction. The results show that ZrN co-exists with Si3N4,Y2O3 and Y2Si3O3N4 （i.e., M-phase, melillite） and the M-phase is thereaction product of Si3N4 and Y2O3 at the molar ratio of 1：1 in ZrN–Si3N4–Y2O3 system. When the ternary system expands to theZrN–Si3N4–Y2O3–SiO2 quaternary system on the surface of Si3N4 powder in the presence of SiO2, ZrN co-exists with threenitrogen-containing yttrium silicates, i.e., M-Phase, Y4Si2N2O7 （i.e., J-phase or monoclinic Y4Al2O9-type）, Y5（SiO4）3N （i.e., H-phaseor apatite） and Si3N4,Y2O3, respectively, in which the J-phase and H-phase are the reaction products of Si2N2O （i.e., the product ofSi3N4 and SiO2 at the molar ratio of 1：1） and Y2O3 at the molar ratios of 2：1 and 9：5. It is indicated that the phase diagram ofZrN–Si3N4–Y2O3 system can clarify the phase composition of ZrN ceramic and ZrN/Si3N4 composite materials for their preparation.

关 键 词：相组成 氮化锆 超高温陶瓷 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]