Ultrafine-grained β-Sialon fabricated by two-stage sintering and study on diffusion toughening of Ti-22Al-25Nb

被引：1
作者：
Xi, Chenyang [1 ]
Cui, Tianlun [1 ]
Guo, Haoshan [1 ]
Liang, Kangbo [1 ]
Zhang, Chunxiang [2 ]
Luo, Junting [1 ,2 ,3 ]
机构：
[1] Yanshan Univ, Key Lab Adv Forging & Stamping Technol & Sci, Educ Minist, Qinhuangdao, Peoples R China
[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao, Peoples R China
[3] Yanshan Univ, Key Lab Adv Forging & Stamping Technol & Sci, Educ Minist, Qinhuangdao 066004, Peoples R China
来源：
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2023年 / 20卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Al2O3-Y2O3; diffusion toughening mechanism; Ti-22Al-25Nb; two-stage sintering; ultrafine-grained beta-Sialon; MECHANICAL-PROPERTIES; SILICON-NITRIDE; SI3N4; CERAMICS; FRACTURE-TOUGHNESS; MICROSTRUCTURE; ADDITIVES; Y2O3;
D O I：
10.1111/ijac.14323
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：
The ultrafine-grained beta-Sialon ceramics were fabricated by spark plasma sintering at different temperatures with inorganic Al2O3-Y2O3 and Ti-22Al-25Nb intermetallic powder as composite additives. The research showed that beta-Sialon ceramics achieve two-stage sintering densification. Al2O3-Y2O3 inorganic additives promoted the synthesis and densification of beta-Sialon ceramics at 1125-1215?. Ti-22Al-25Nb intermetallic powder diffused Ti and Nb elements at 1240-1425?, thereby improving the fracture toughness of beta-Sialon ceramics. The maximum fracture toughness (similar to 9.69 MPa m(1/2)) under 19.6 N was obtained for beta-Sialon ceramics sintered at 1600?.
引用
收藏
页码：1408 / 1419
页数：12
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