Microstructure and mechanical effects of spark plasma sintering in alumina monolithic ceramics

被引：17
作者：
Alvarez-Clemares, I. [1 ]
Borrell, A. [2 ]
Agouram, S. [3 ]
Torrecillas, R. [1 ]
Fernandez, A. [1 ,4 ]
机构：
[1] Univ Oviedo, CINN, Consejo Super Invest Cient, Llanera 33428, Spain
[2] Univ Politecn Valencia, Inst Tecnol Mat, Valencia 46022, Spain
[3] Univ Valencia, Dept Fis Aplicada & Electromagnetismo, E-46100 Burjassot, Spain
[4] ITMA Mat Technol, Llanera 33428, Spain
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 08期
关键词：
Transmission electron microscopy; Ceramics; Dislocations; High-temperature deformation; Mechanical properties; SUPERPLASTIC FLOW; COMPOSITES; STRENGTH;
D O I：
10.1016/j.scriptamat.2012.12.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The specific effects of spark plasma sintering (SPS) on the creep behavior, microstructure and mechanical properties of alumina monolithic ceramic were investigated. SPS introduces strains that concentrate at grain boundaries and inhibit crack growth, resulting in an improvement in the flexural strength and fracture toughness. However, creep blocks grain boundary movements and decreases the reliability of the material. These strains can be removed by a post-sintering thermal treatment, which plays an important role in the distribution of dislocations. Crown Copyright (c) 2012 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.
引用
收藏
页码：603 / 606
页数：4
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