Effect of β-Si3N4 Initial Powder Size on Texture Development of Porous Si3N4 Ceramics Prepared by Gel-Casting in a Magnetic Field

被引:5
作者
Yang, Zhigang [1 ]
Yu, Jianbo [1 ]
Li, Chuanjun [1 ]
Zhong, Yunbo [1 ]
Deng, Kang [1 ]
Ren, Zhongming [1 ]
Wang, Qiuliang [2 ]
Dai, Yinming [2 ]
Wang, Hui [2 ]
机构
[1] Shanghai Univ, State Key Lab Adv Special Steels, Shanghai 200072, Peoples R China
[2] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China
关键词
Porous; Texture; Magnetic field; Gel casting; Grain growth; SILICON-NITRIDE CERAMICS; GRAIN-GROWTH; FABRICATION; AL2O3; ALIGNMENT; OXIDE;
D O I
10.1080/0371750X.2016.1202143
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Textured porous Si3N4 ceramics with fine and coarse beta-Si3N4 powders as the raw materials were prepared by gel casting in a strong magnetic field of 6T and subsequent pressureless sintering. These results showed that highly textured porous Si3N4 ceramics could be obtained by adjusting the ratio between fine and coarse beta-Si3N4 powders in 6T. The Lotgering orientation factor in green bodies showed the value of 0.72 similar to 0.74 with the increase of coarse powder content. The sintering process promoted texture development of the samples by Ostwald ripening owing to the big difference in the beta-Si3N4 initial powder size. After sintering at 1800 degrees C for 2 h, the degree of texture (Lotgering orientation factor) in the sample, prepared with fine and coarse powders at the ratio of 1:1, reached the maximum value (0.91), and it had relatively high density (66.91%) and low apparent porosity (34.51%). The crystallographic texture in porous Si3N4 ceramics led to the anisotropic bending strength. The method combined with gel casting in a strong magnetic field was beneficial for preparing highly textured porous ceramics with big and complex shape.
引用
收藏
页码:256 / 262
页数:7
相关论文
共 31 条
  • [1] Pressure sintering of silicon nitride powder coated with Al2O3 and TiO2
    Biswas, SK
    Riley, FL
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (02) : 212 - 216
  • [2] Pressureless sintering of α-Si3N4 porous ceramics using a H3PO4 pore-forming agent
    Chen, Fei
    Shen, Qiang
    Yan, Faqiang
    Zhang, Lianmeng
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2007, 90 (08) : 2379 - 2383
  • [3] Ghosh D., 2004, T INDIAN CERAM SOC, V63, P199, DOI DOI 10.1080/0371750X.2004
  • [4] Gelcasting of Strontium Doped Lanthanum Manganite for Solid Oxide Fuel Cell Applications
    Haleem, B. Abdul
    Bhuvana, R.
    Udayakumar, A.
    [J]. TRANSACTIONS OF THE INDIAN CERAMIC SOCIETY, 2009, 68 (03) : 139 - 144
  • [5] Fracture energy of an aligned porous silicon nitride
    Inagaki, Y
    Ohji, T
    Kanzaki, S
    Shigegaki, Y
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2000, 83 (07) : 1807 - 1809
  • [6] Silicon Nitride for High-Temperature Applications
    Klemm, Hagen
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2010, 93 (06) : 1501 - 1522
  • [7] Fabrication of porous anisotropic silicon nitride by using partial sinter-forging technique
    Kondo, N
    Inagaki, Y
    Suzuki, Y
    Ohji, T
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 335 (1-2): : 26 - 31
  • [8] Effect of β-Si3N4 starting powder size on elongated grain growth in β-Si3N4 ceramics
    Lee, CJ
    Chae, JI
    Kim, DJ
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2000, 20 (14-15) : 2667 - 2671
  • [9] Lee CJ, 1999, J AM CERAM SOC, V82, P753, DOI 10.1111/j.1151-2916.1999.tb01828.x
  • [10] EFFECT OF ALPHA-BETA[BETA'] PHASE-TRANSITION ON THE SINTERING OF SILICON-NITRIDE CERAMICS
    LEE, DD
    KANG, SJL
    PETZOW, G
    YOON, DN
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (03) : 767 - 769