个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:哈尔滨工业大学
学位:博士
所在单位:材料科学与工程学院
学科:航空宇航制造工程. 飞行器设计. 材料学. 航空航天力学与工程
办公地点:综合实验1号楼201B室
联系方式:gdshi@dlut.edu.cn
电子邮箱:gdshi@dlut.edu.cn
Effect of oxidation at 1100 degrees C on the strength of ZrB2-SiC-graphite ceramics
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论文类型:期刊论文
发表时间:2011-06-16
发表刊物:JOURNAL OF ALLOYS AND COMPOUNDS
收录刊物:SCIE、EI
卷号:509
期号:24
页面范围:6871-6875
ISSN号:0925-8388
关键字:Zirconium diboride; Surface oxidation; Microstructure
摘要:One standard surface crack was introduced at the center of the tension surface of the test specimens with a Vickers indenter to investigate the effect of oxidation on the strength of ZrB2-SiC-graphite ceramic. The flexural strength of the pre-cracked specimen was 371.7 MPa, which was lower than the strength of similar to 500MPa for the original ceramic. Oxidation in dry or moist air was employed for 30, 60, or 90 min. The flexural strength of the oxidized specimens increased as the oxidation time increased up to 60 min and then the flexural strength did not further increase. The flexural strength of specimens oxidized in dry air was greater than those specimens oxidized in moist air, which revealed that the compounds of glassy structure could better heal the cracks on the surface of the specimen than the compounds of lamellar structure. The strength of the oxidized specimen was comparable to the strength of the pre-cracked specimens. (C) 2011 Elsevier B.V. All rights reserved.