Y2O3和TiO2烧结剂对制备β-Sialon陶瓷烧结性能的影响

刘新, 曲殿利, 郭玉香, 彭晓文

刘新, 曲殿利, 郭玉香, 等. Y2O3和TiO2烧结剂对制备β-Sialon陶瓷烧结性能的影响[J]. 复合材料学报, 2017, 34(9): 2012-2019. DOI: 10.13801/j.cnki.fhclxb.20170313.001
引用本文: 刘新, 曲殿利, 郭玉香, 等. Y2O3和TiO2烧结剂对制备β-Sialon陶瓷烧结性能的影响[J]. 复合材料学报, 2017, 34(9): 2012-2019. DOI: 10.13801/j.cnki.fhclxb.20170313.001
LIU Xin, QU Dianli, GUO Yuxiang, et al. Effects of Y2O3 and TiO2 as sintering additive on sintering properties of β-Sialon ceramic[J]. Acta Materiae Compositae Sinica, 2017, 34(9): 2012-2019. DOI: 10.13801/j.cnki.fhclxb.20170313.001
Citation: LIU Xin, QU Dianli, GUO Yuxiang, et al. Effects of Y2O3 and TiO2 as sintering additive on sintering properties of β-Sialon ceramic[J]. Acta Materiae Compositae Sinica, 2017, 34(9): 2012-2019. DOI: 10.13801/j.cnki.fhclxb.20170313.001

Y2O3和TiO2烧结剂对制备β-Sialon陶瓷烧结性能的影响

基金项目: 国家科技支撑计划项目(2014BAB02B01;2014BAB02B03)
详细信息
    通讯作者:

    曲殿利,博士,教授,硕士生/博士生导师,研究方向为氧化物与非氧化物复合材料,E-mail:qudianli@126.com

  • 中图分类号: TB332

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

  • 摘要: 以金属Al粉、单质Si粉、α-Al2O3微粉为主要原料,高温氮化反应制备β-Sialon陶瓷。通过在反应物中分别添加不同含量的Y2O3和TiO2烧结剂,研究分析和对比了Y3+和Ti4+对β-Sialon陶瓷晶相组成、晶格常数、微观结构及烧结性能的影响。采用SEM及EDS对试样的微观形貌进行观察与分析,利用X'Pert Plus软件分析晶相的晶格常数,采用半定量法计算试样晶相组成。结果表明:Y2O3和TiO2可显著降低高温氮化法制备β-Sialon陶瓷试样中β-Sialon相的生成温度。伴随着Y2O3和TiO2的引入,Al2O3在Si3N4中的固溶度提高,β-Sialon晶相的生成量增加,晶格常数和晶胞体积增大,烧结性能得到改善。综合对比分析,Y2O3和TiO2均对制备β-Sialon陶瓷具有良好的促烧结作用,用成本较低的TiO2代替传统的稀土氧化物作为助烧结剂无压烧结制备β-Sialon陶瓷是可行的。
    Abstract: 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.
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  • 被引次数: 9
出版历程
  • 收稿日期:  2016-12-19
  • 修回日期:  2017-02-23
  • 刊出日期:  2017-09-14

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