Effects of Y2O3 and TiO2 as sintering additive on sintering properties of β-Sialon ceramic

被引：0
|
作者：
Liu X. [1 ]
Qu D. [1 ]
Guo Y. [1 ]
Peng X. [2 ]
机构：
[1] School of High Temperature Material and Magnesite Resources Engineering, University of Science and Technology LiaoNing, Anshan
[2] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing
来源：
Qu, Dianli (qudianli@126.com) | 2012年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 34期
关键词：
Sintering additives; Sintering properties; TiO[!sub]2[!/sub; Y[!sub]2[!/sub]O[!sub]3[!/sub; β-Sialon;
D O I：
10.13801/j.cnki.fhclxb.20170313.001
中图分类号：
学科分类号：
摘要：
β-Sialon ceramic was prepared by high temperature nitriding reaction of raw material including Al metal powder, Si powder and α-Al2O3 fine powder. Adding different mass fractions of Y2O3 and TiO2 as sintering additive, the effect of Y3+ and Ti4+ on the composition, lattice parameters, sintering properties and microstructure of crystalline phases was studied and compared. The crystalline phases and microstructure were determined by XRD and SEM, respectively. The lattice parameters of the crystalline phases were estimated by X'Pert Plus software. The phase composition was evaluated by semi-quantification method. The results show that the addition of Y2O3 and TiO2 makes the formation temperature of β-Sialon lower obviously. Adding of Y2O3 and TiO2 has a beneficial effect on the solid solubility of Al2O3 dissolving into Si3N4, the content and the lattice parameters of β-Sialon phase increase and the sintering properties are improved. Comprehensive analysis shows that Y2O3 and TiO2 promote the sintering properties of β-Sialon ceramic, the formation of pressureless sintered β-Sialon ceramic is possible using low cost TiO2 powder instead of the conventional rare earth as sintering additives. © 2017, Chinese Society for Composite Materials. All right reserved.
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页码：2012 / 2019
页数：7
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