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

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

1.
辽宁科技大学高温材料与镁资源工程学院, 鞍山 114051;
2.
北京科技大学材料学院, 北京 100083

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
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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

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

1.
School of High Temperature Material and Magnesite Resources Engineering, University of Science and Technology LiaoNing, Anshan 114051, China;
2.
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

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。
- Y₂O₃ /
- TiO₂ /
- β-Sialon /
- 烧结剂 /
- 烧结性能
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.
- Y₂O₃ /
- TiO₂ /
- β-Sialon /
- sintering additives /
- sintering properties

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