期刊
ACTA MATERIALIA
卷 58, 期 9, 页码 3390-3399出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2010.02.013
关键词
Ceramics; Sintering; Transmission electron microscopy (TEM); Electrical resistivity/conductivity
A commercially available granulated TZ3Y powder has been sintered by hot-pressing (HP). The grain size/relative density relationship, referred to here as the sintering path, has been established for a constant value of the heating rate (25 degrees C min(-1)) and a constant value of the macroscopic applied pressure (100 MPa). It has then been compared to that obtained previously on the same powder but sintered by spark plasma sintering (SPS, heating rate of 50 degrees C min(-1), same applied macroscopic pressure). By coupling the analysis of a sintering law (derived from creep rate equations) and comparative observations of sintered samples using transmission electron microscopy, a hypothesis about the densification mechanism(s) involved in SPS and HP has been proposed. Slight differences in the densification mechanisms lead to scars in the microstructure that explain the higher total ionic conductivity measured, in the temperature range 300-550 degrees C, when SPS is used for sintering. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据