High-pressure sintering mechanism of yttrium aluminum garnet (Y3Al5O12) transparent nanoceramics

被引：43
|
作者：
Liu, Ke [1 ,2 ]
He, Duanwei [1 ]
Wang, Haoming [3 ,4 ]
Lu, Tiecheng [3 ,4 ]
Li, Feng [3 ,4 ]
Zhou, Xiaolin [2 ]
机构：
[1] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Peoples R China
[2] Sichuan Univ, Dept Phys, Chengdu 610066, Peoples R China
[3] Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China
[4] Sichuan Univ, Key Lab Radiat Phys & Technol, Minist Educ, Chengdu 610064, Peoples R China
来源：
SCRIPTA MATERIALIA | 2012年 / 66卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Nanoceramics; High-pressure sintering; Plastic deformation; YAG; CUBIC BORON-NITRIDE; CERAMIC SCINTILLATORS; YAG NANOCERAMICS; HIGH-TEMPERATURE; DIAMOND; POWDER;
D O I：
10.1016/j.scriptamat.2011.11.012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We propose a sintering mechanism of transparent Y3Al5O12 nanoceramics under high pressure. Through analysis of the porosity, grain size and residual stress for the nanostructured YAG compacts prepared at high pressure and modest temperature (HPMT, 2.0-5.0 GPa and 300-500 degrees C), the nanosintering behavior was systematically investigated. High pressure can initiate the plastic deformation of nanograins to eliminate pores and enhance the local atomic diffusion among grain boundaries, thus producing fine nanostructured and near fully dense transparent YAG bulks. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：319 / 322
页数：4
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