期刊信息
主管单位:国家教育部
主办单位:重庆大学
主  编:
地  址:重庆市沙坪坝正街174号
邮政编码:400030
电  话:023-65102302
电子邮件:xbsg@cqu.edu.cn
国际标准刊号:ISSN 1000-582X
国内统一刊号:CN 50-1044/N
邮发代号:国内78-16 国外 M355
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ EndNote   BibTeX  过刊浏览    高级检索
本文已被:浏览 37次   下载 9 本文二维码信息
码上扫一扫!
分享到: 微信 更多
初始粉体状态对氧化铝/氧化锆纳米陶瓷烧结性能的影响
范长颉1, 李鑫2, 许西庆3, 张鑫3, 牛书鑫2
1.空装驻北京地区第六军事代表室, 北京 100024;2.北京航空材料研究院 先进高温结构材料重点实验室, 北京 100095;3.长安大学 材料科学与工程学院, 西安 710064
摘要:
通过放电等离子体烧结(SPS),分别以纳米多晶粉体和非晶粉体作为原料制备了Al2O3-ZrO2纳米陶瓷复合材料,并研究了初始粉体状态对致密化过程和微观结构的影响。将纳米多晶粉体通过SPS烧结为致密的纳米块体,所需的最低烧结温度为1 400℃,所得产品的晶粒尺寸约为320 nm;非晶粉体完全致密所需的SPS温度为1 200℃,所得产品的晶粒尺寸约为150 nm。相比于纳米多晶粉体,非晶粉体可以在较低的温度下烧结成为致密纳米块体,我们将这一现象归结为非晶粉体在烧结中的相转变。这一发现为纳米陶瓷块体的低温烧结提供了新的思路。
关键词:  放电等离子体烧结  纳米复相陶瓷  晶粒尺寸  低温烧结  相转变
DOI:10.11835/j.issn.1000-582X.2019.12.008
分类号:TQ174.4
基金项目:中央高校基本科研业务费专项资金资助项目(CHD300102319303)和陕西省省级大学生创新创业训练计划项目资助(S201910710300)。
Effects of starting powders on sinterability of Al2O3-ZrO2 nanoceramics
FAN Changjie1, LI Xin2, XU Xiqing3, ZHANG Xin3, NIU Shuxin2
1.Sixth Military Representative Office of Air Force Equipment Department in Beijing, Beijing 100095, P. R. China;2.Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, P. R. China;3.School of Materials Science & Engineering, Chang'an University, Xi'an 710061, P. R. China
Abstract:
In this work, Al2O3-ZrO2 nanocomposites were prepared by spark plasma sintering (SPS) of nanocrystalline and amorphous powders, respectoively, and effects of starting powders on the densification and microstructure of the nanocomposites were investigated. To obtain dense nanocomposites, the minimum SPS temperature for nanocrystal powders was 1 400℃, and the resulting grain sizes were about 320 nm. For amorphous powders, however, the hot pressing temperature was as low as 1 200℃, and the products exhibited finer grains of about 150 nm. It was confirmed that amorphous powders could be hot pressed into dense nanocomposites at lower temperatures than nanocrystalline powders, and the easier densification of amorphous powders was attributed to the phase transformation of amorphous particles in sintering. This finding could provide new guidance for low temperature sintering of bulk nanocomposites.
Key words:  spark plasma sintering  nanocomposite ceramics  grain size  low-temperature sintering  phase transformation
Copyright@ 2008 All Rights Reserved.