材料研究学报  2015, Vol. 29 Issue (5): 371-376    DOI: 10.11901/1005.3093.2014.382

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烧结条件对强磁场中成型氮化硅织构化的影响*

杨治刚1,余建波1,李传军1,邓康1,任忠鸣1(),钟云波1,王秋良2,王晖2

1. 上海大学 上海市现代冶金和材料制备重点实验室 上海 200072 2. 中国科学院电工研究所 北京 100190

Effect of Sintering Conditions on Texture Formation of Si3N4 Ceramic Shaped up in a Strong Magnetic Field

Zhigang YANG1,Jianbo YU1,Chuanjun LI1,Kang DENG1,Zhongming REN1,**(),Yunbo ZHONG1,Qiuliang WANG2,Yinming DAI2,Hui WANG2

1. Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China 2. Institute of Electrical Engineering, Chinese Academy of Science, Beijing 100190, China

杨治刚,余建波,李传军,邓康,任忠鸣,钟云波,王秋良,王晖. 烧结条件对强磁场中成型氮化硅织构化的影响^*[J]. 材料研究学报, 2015, 29(5): 371-376.
Zhigang YANG, Jianbo YU, Chuanjun LI, Kang DENG, Zhongming REN, Yunbo ZHONG, Qiuliang WANG, Yinming DAI, Hui WANG. Effect of Sintering Conditions on Texture Formation of Si₃N₄ Ceramic Shaped up in a Strong Magnetic Field[J]. Chinese Journal of Materials Research, 2015, 29(5): 371-376.

摘要 图/表 参考文献 相关文章 Metrics 全文: PDF(3852 KB)   HTML 摘要:  采用凝胶注模成型方法在6T纵向强磁场中制备氮化硅陶瓷素坯, 经磁场外无压烧结制备出a轴或b轴取向的织构化氮化硅陶瓷, 研究了烧结温度和保温时间对氮化硅陶瓷织构化形成的影响规律。结果表明: 在本文的烧结条件下α-Si3N4全部转变为β-Si3N4。烧结温度的提高促进了氮化硅陶瓷织构化的提高, 从1700℃的0.40增加到1800℃的0.76。烧结温度为1750℃时, 烧结时间的延长对织构度的发展几乎没有影响。 关键词 ： 无机非金属材料,  氮化硅,  织构化,  凝胶注模成型,  强磁场     Abstract： Si3N4 ceramics with preferential texture along a or b axis were shaped up by gel-casting in a magnetic field of 6T and then pressureless sintered. Effect of the sintering temperature and time on the texture formation of the Si3N4 ceramics was investigated. It was found that the phase transformation of α to β was completed for the Si3N4 ceramics prepared by the present process. With the increasing sintering temperature the texture formation of Si3N4 ceramics may be enhanced, i.e. of which the degree of texture increased from 0.40 at 1700℃ to 0.76 at 1800℃. The extension of sintering time at 1750℃ had few effect on texture development of Si3N4 ceramics. Key words： inorganic nonmetallic materials    silicon nitride    texture    gel-casting    strong magnetic field 收稿日期: 2014-07-25      基金资助:*国家自然科学基金50902140和50872142/E0207资助项目。 作者简介: 任忠鸣 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 杨治刚 余建波 李传军 邓康 任忠鸣 钟云波 王秋良 王晖 44.8K 链接本文: https://www.cjmr.org/CN/10.11901/1005.3093.2014.382      或      https://www.cjmr.org/CN/Y2015/V29/I5/371 图1  实验装置图 图2  在1750℃烧结样品的XRD图谱 图3  在6T磁场中成型在不同温度烧结2 h样品的XRD图谱 图4  在不同温度烧结2 h样品的取向因子 图5  在不同温度烧结2 h样品的断口形貌(垂直于磁场方向的断面) 图6  在不同温度烧结2 h样品的相对密度 图7  在不同温度烧结2 h的织构化样品的抗弯强度 图8  在6T磁场中成型在1750℃烧结不同时间样品的XRD图谱 图9  在6T磁场中成型在1750℃烧结不同时间样品的取向因子 1 N. Konedo, Y. Suzuki, T. Ohji,Superplastic sinter-forging of silicon nitride with anisotropic microstructure formation, J. Am. Ceram. Soc., 82(4), 1067(1999) 2 M. Nakamura, K. Hirao, Y. Yamauchi, S. Kanzaki, Tribological properties of unidirectionally aligned silicon nitride. J. Am. Ceram. Soc., 84(11), 2579(2001) 3 Y. P. Zeng, J. F. Yang, N. Kondo, T. Ohji, H. Kita, S. 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