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首页> 外文期刊>Inorganic materials >Hot-Pressed Si_3N_4 Ceramics Containing CaO-Al_2O_3-AlN Modifying Additives
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Hot-Pressed Si_3N_4 Ceramics Containing CaO-Al_2O_3-AlN Modifying Additives

机译：包含CaO-Al_2O_3-AlN改性添加剂的热压Si_3N_4陶瓷

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摘要

We have studied the influence of SHS aluminum nitride content (5-15%) and particle size on the fabrication conditions (hot pressing in a nitrogen atmosphere) of Si_3N_4-based ceramics containing CaO-Al_2O_3-A1N sintering aids. The results demonstrate that the reaction of Si_3N_4 with a eutectic calcium alumi-nate mixture during liquid-phase sintering leads to the formation of a-sialon-based intergranular phases: Ca_(m/z)Si_(12-(m-n))Al_(m+n)O_nN_(16-n) The addition of AlN to starting mixtures contributes to a more complete conversion of the calcium aluminate sintering aid to Ca-a-sialon and influences the relationship between a-Si_3N_4 and β-Si_3N_4 in the ceramics. We examine the influence of synthesis conditions and the percentages of added calcium aluminates and aluminum nitride on the density, porosity, and bending strength of the ceramics. Thermogravimetric analysis data demonstrates that the Si_3N_4 + Ca-a-sialon composites obtained are stable to oxidation in air up to 1300℃.
机译：我们研究了SHS氮化铝含量（5-15％）和粒径对含CaO-Al_2O_3-A1N烧结助剂的Si_3N_4基陶瓷的制造条件（在氮气氛中热压）的影响。结果表明，Si_3N_4与共晶铝酸钙混合物在液相烧结过程中的反应导致形成基于α-赛隆的晶间相：Ca_（m / z）Si_（12-（mn））Al_（ m + n）O_nN_（16-n）向起始混合物中添加AlN有助于更彻底地将铝酸钙烧结助剂转化为Ca-a-sialon，并影响陶瓷中a-Si_3N_4和β-Si_3N_4之间的关系。我们研究了合成条件以及铝酸钙和氮化铝添加量对陶瓷密度，孔隙率和弯曲强度的影响。热重分析数据表明，所获得的Si_3N_4 + Ca-a-sialon复合材料在高达1300℃的空气中对氧化稳定。

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  • 来源
    《Inorganic materials》 |2012年第11期|1158-1163|共6页
  • 作者

    Yu. F. Kargin; A. S. Lysenkov; S. N. Ivicheva; V. V. Zakorzhevskii; I. P. Borovinskaya; S. V. Kutsev; K. A. Solntsev;

  • 作者单位

    Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991 Russia;

    Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991 Russia;

    Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991 Russia;

    Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, ul. Akademika Osip 'yana 8, Chernogolovka, Moscow oblast, 142432 Russia;

    Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, ul. Akademika Osip 'yana 8, Chernogolovka, Moscow oblast, 142432 Russia;

    Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991 Russia;

    Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991 Russia;

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