Hydrothermal corrosion and flexural strength of Si3N4-based ceramics

被引：10
|
作者：
Galuskova, D. [1 ,2 ]
Kasiarova, M. [3 ]
Hnatko, M. [4 ]
Galusek, D. [1 ,2 ]
Dusza, J. [3 ]
Sajgalik, P. [4 ]
机构：
[1] TnU AD, Joint Glass Ctr IIC SAS, Trencin, Slovakia
[2] FChET STU, Trencin, Slovakia
[3] Slovak Acad Sci, Inst Mat Res, Kosice, Slovakia
[4] Slovak Acad Sci, Inst Inorgan Chem, Bratislava, Slovakia
来源：
CORROSION SCIENCE | 2014年 / 85卷
关键词：
Ceramic; SEM; Pitting corrosion; SILICON-NITRIDE MATERIALS; PART I; SI3N4-CERAMICS; TEMPERATURE; DEGRADATION; FATIGUE; SI3N4;
D O I：
10.1016/j.corsci.2014.04.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mechanisms of dissolution of silicon nitride ceramics prepared with Y2O3 sintering aid, and of SiAlON ceramics in deionized water and in 0.5 M sodium chloride solution tested in the temperature range between 150 degrees C and 290 degrees C are discussed with respect to their influence on flexural strength of the corroded materials. The corrosion resulted in deterioration of the flexural strength of silicon nitride, which dropped from similar to 700 MPa to similar to 290 MPa after 12 days exposure at 290 degrees C. For SiAlON exposed to deionized water increase of the flexural strength from 190 MPa to similar to 300 MPa was observed. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：94 / 100
页数：7
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