Sintering behavior of an ultrafine alumina powder shaped by pressure filtration and dry pressing

被引：14

作者：

Aminzare, M. ^{[2
]}

Golestani-fard, F. ^{[2
]}

Guillon, O. ^{[3
]}

Mazaheri, Mehdi ^{[1
]}

Rezaie, H. R. ^{[2
]}

机构：

[1] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, SB IPMC LNNME, Inst Phys Complex Matter, CH-1015 Lausanne, Switzerland

[2] Iran Univ Sci & Technol, Dept Mat & Met Engn, Tehran, Iran

[3] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 16-17期

关键词：

Alumina; Master sintering curve; Activation energy; Sintering; GRAIN-GROWTH; DENSIFICATION; NANOCRYSTALLINE; CURVE; TEMPERATURE; EVOLUTION; ZIRCONIA; ZNO; DEPENDENCE; CERAMICS;

D O I：

10.1016/j.msea.2010.03.051

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Master sintering curve (MSC) was used as a practical approach to analyse the sintering behavior of an ultrafine alumina powder. Non-isothermal sintering was carried out at three heating rates. The concept of the MSC has been used to investigate the effect of different shaping methods, i.e. dry pressing (DP) and pressure filtration (PF) on the apparent activation energy for sintering. Although no change in the dominant densification mechanism is expected, the interplay between different diffusion mechanisms taking place during the heating ramp may be affected by the shaping method. Values of 605 +/- 15 and 700 +/- 20 kJ/mol were determined for PF and DP samples, respectively. The lower activation energy for PF samples may be explained by the higher green density and homogeneity, smaller pore size in comparison with the DP samples. Furthermore, the mechanical properties (hardness and fracture toughness) of the samples are presented. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3807 / 3812

页数：6

共 41 条

[11] Suppression of grain growth in sub-micrometer alumina via two-step sintering method [J].