Pressureless-sintering behavior of nanocrystalline ZrO2-Y2O3-Al2O3 system

被引：40

作者：

Zhang, Yongsheng

Chen, Jianmin ^{[1
]}

Hu, Litian

Liu, Weimin

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

MATERIALS LETTERS | 2006年 / 60卷 / 17-18期

基金：

中国国家自然科学基金;

关键词：

ZrO2-Y2O3-Al2O3; nanocomposites; pressureless sintering; hardness;

D O I：

10.1016/j.matlet.2005.12.129

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ZrO2-Y2O3-Al2O3 nanocrystalline powders have been synthesized using chemical coprecipitation method. Nano-powders were compacted uniaxially and densified in a muffle furnace. Densification studies showed that a fully dense pellet of ZrO2(3Y) and a 99% relative density for 5 mol% Al2O3 doped ZrO2(3Y) were obtained after sintering at 1200 degrees C. The presence of Al2O3 inhibits grain growth and suppresses the densification process. Full densification and the maximum microhardness of 17.8 GPa were achieved for the ZrO2(3Y)/5 mol% Al2O3 composites sintered at 1250 degrees C. (c) 2006 Elsevier B.V All rights reserved.

引用

页码：2302 / 2305

页数：4

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