Microstructure and flexural strength of hafnium diboride via flash and conventional spark plasma sintering

被引：11
|
作者：
Demirskyi, D. [1 ,2 ]
Suzuki, T. S. [2 ]
Grasso, S. [3 ]
Vasylkiv, O. [2 ]
机构：
[1] Tohoku Univ, WPI AIMR, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
[3] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Sichuan, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2019年 / 39卷 / 04期
关键词：
Hafnium diboride; Flash sintering; Flexural strength; High temperature materials; GRAIN-GROWTH; EUTECTIC COMPOSITES; DENSIFICATION; BEHAVIOR; HFB2; MECHANISMS; DIFFUSION; ZIRCONIUM; FSPS;
D O I：
10.1016/j.jeurceramsoc.2018.12.012
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：
Microstructure evolution in bulk hafnium diboride ceramics prepared by spark plasma sintering in flash regime was compared with conventional spark plasma sintering. The conventional and flash spark plasma sintering resulted in ceramics with a high relative density exceeding 96% of their theoretical density. A remarkably fine grain size distribution was noticed for the specimen prepared in the flash regime. This atypical microstructure evolution provides a possible insight into the mechanism of flash sintering for conductive bulks. The room temperature flexural strength of the hafnium diboride processed by flash SPS was 650 MPa which is 140 MPa higher than the sample produced by conventional SPS.
引用
收藏
页码：898 / 906
页数：9
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