Enhanced properties of pure alumina ceramics by oscillatory pressure sintering

被引：57

作者：

Han, Yao ^{[1
]}

Li, Shuang ^{[2
]}

Zhu, Tianbin ^{[1
]}

Wu, Weiwei ^{[1
]}

An, Di ^{[1
]}

Xie, Zhipeng ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Shandong Univ Technol, Sch Resources & Environm Engn, Zibo 255049, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Oscillatory pressure sintering; Elastic modulus; Alumina; Grain size; MECHANICAL-PROPERTIES; GRAIN-GROWTH; MICROSTRUCTURE; DENSIFICATION; STRENGTH; HARDNESS; AL2O3;

D O I：

10.1016/j.ceramint.2017.12.133

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel oscillatory pressure sintering (OPS) process to consolidate high-quality pure alumina ceramics is reported. The microstructure of the ceramics prepared by OPS develops into a higher final density, a smaller and a narrower distribution of grain sizes compared with those prepared by conventional pressureless sintering (PS) and hot-pressing (HP) processes. Enhanced mechanical properties of alumina ceramics were investigated by OPS process. The bending strength, hardness and elastic modulus of the OPS specimen reached about 546 MPa, 19.1 GPa and 374 GPa, respectively, i.e values significantly higher than that of the specimens by PS and HP. XRD analysis indicates the strengthening of atomic bonds aided by oscillatory pressure. The results suggest OPS to be an effective technique for preparing high-quality pure alumina ceramics.

引用

页码：5238 / 5241

页数：4

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