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首页> 外文会议>International Symposium on Nitrides; 20060403-05; Eskisehir(TK) >The Intergranular Oxynitride Microstructure in Silicon Nitride Based Ceramics
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The Intergranular Oxynitride Microstructure in Silicon Nitride Based Ceramics

机译：氮化硅基陶瓷中晶间氮氧化物的微观结构

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摘要

The intergranular microstructure in a liquid phase sintered silicon nitride based ceramic may be viewed as an oxynitride glass-ceramic. This work is concerned with the incorporation of yttrium B-phase, which is a five-component phase, into the intergranular regions of silicon nitride ceramics. The silicon nitride materials were fabricated with the addition of a powdered B-phase parent glass with composition (e/o) 35Y:45Si:20Al:83O:17N, or the addition of a mixture of Y_2O_3, SiO_2 and Al_2O_3 with cation composition (e/o) 35Y:45Si:20Al. The starting powder mixtures contained 10 wt% of sintering additives. Sintering for 2 h at 1800℃ was followed by a two-step post-densification heat treatment in order to promote nucleation and growth of yttrium B-phase. Detailed imaging and elemental analysis of the intergranular regions was carried out by EDX in a FEGTEM.
机译：液相烧结的氮化硅基陶瓷中的晶粒间微结构可以看作是氧氮化物玻璃陶瓷。这项工作涉及到将氮化硼陶瓷中的五组分相钇B相掺入到氮化硅陶瓷的晶界区域中。氮化硅材料是通过添加粉末成分为（e / o）35Y：45Si：20Al：83O：17N的B相母体玻璃或添加阳离子组成为Y_2O_3，SiO_2和Al_2O_3的混合物制成的（ e / o）35Y：45Si：20Al。起始粉末混合物包含10重量％的烧结添加剂。在1800℃下烧结2 h，然后进行两步致密化后热处理，以促进钇B相的形核和生长。 EDX在FEGTEM中对晶间区域进行了详细的成像和元素分析。

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