High pressure densification behavior of alumina particles

被引：6

作者：

Liu, Fangming ^{[1
]}

Zhang, Jiawei ^{[2
]}

Liu, Pingping ^{[1
]}

He, Duanwei ^{[2
]}

机构：

[1] Yangtze Normal Univ, Sch Mat Sci & Engn, Chongqing Key Lab Extraordinary Bond Engn & Adv M, Chongqing 408100, Peoples R China

[2] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Peoples R China

来源：

SCRIPTA MATERIALIA | 2021年 / 191卷

关键词：

High pressure; Alumina ceramics; Microstructure; Plastic deformation; Densification mechanism; SINTERING CRYSTALLINE SOLIDS; YIELD STRENGTH; MECHANISM; MODELS; AL2O3;

D O I：

10.1016/j.scriptamat.2020.09.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Pressure is an important thermodynamic parameter in addition to temperature and chemical composition during material sintering process. However, few experimental images intuitively describing the densification process of grains during compression, especially for the high melting point ceramics. Here we observed deformation evolution and mechanical response of spherical alumina particles after high pressure treatment. By analyzing the plastic deformation and grain boundary characters of spherical alumina particles, and the boundary stress and yield stress variation of grains under various pressures and temperatures, a clear picture of the high-pressure powder densification and sintering process is depicted. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：101 / 106

页数：6

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