IMR OpenIR
Effects of High Temperature Oxidation on Mechanical Properties of Ti3AlC2
Li, Xichao; Zheng, Lili; Qian, Yuhai; Xu, Jingjun; Li, Meishuan; Li, MS (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2017-06-01
发表期刊JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
卷号33期号:6页码:596-602
摘要The oxidation tests of Ti3AlC2 were conducted at 1100 and 1200 degrees C in air for 48 and 360 h, respectively, and the effects of high temperature oxidation on the flexural strength and hardness of Ti3AlC2 were investigated. The microstructure, grain size and phase compositions of Ti3AlC2 substrate didn't change after oxidation, hence the oxide removed Ti3AlC2 substrate maintained its initial flexural strength and hardness. However, the flexural strength of oxide retained Ti3AlC2 decreased by about 5%. Acoustic emission monitoring indicated that during the process of three-point bending test, the formed Al2O3 scale on Ti3AlC2 surface fractured firstly in a cleavage manner, then the substrate/oxide interface cracked, and finally the Ti3AlC2 substrate fractured. The mechanical degradation was caused by the preferential formation of cracks in brittle Al2O3 scale as well as at defective and lacunose grain boundaries of the substrate where stress concentration generated. The mechanical degradation was insensitive to oxidation temperature and time in the present conditions. In addition, the surface hardness increased significantly after oxidation due to the formed hard Al2O3 scale on the surface of Ti3AlC2 substrate. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; The oxidation tests of Ti3AlC2 were conducted at 1100 and 1200 degrees C in air for 48 and 360 h, respectively, and the effects of high temperature oxidation on the flexural strength and hardness of Ti3AlC2 were investigated. The microstructure, grain size and phase compositions of Ti3AlC2 substrate didn't change after oxidation, hence the oxide removed Ti3AlC2 substrate maintained its initial flexural strength and hardness. However, the flexural strength of oxide retained Ti3AlC2 decreased by about 5%. Acoustic emission monitoring indicated that during the process of three-point bending test, the formed Al2O3 scale on Ti3AlC2 surface fractured firstly in a cleavage manner, then the substrate/oxide interface cracked, and finally the Ti3AlC2 substrate fractured. The mechanical degradation was caused by the preferential formation of cracks in brittle Al2O3 scale as well as at defective and lacunose grain boundaries of the substrate where stress concentration generated. The mechanical degradation was insensitive to oxidation temperature and time in the present conditions. In addition, the surface hardness increased significantly after oxidation due to the formed hard Al2O3 scale on the surface of Ti3AlC2 substrate. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
部门归属[li, xichao ; zheng, lili ; qian, yuhai ; xu, jingjun ; li, meishuan] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china ; [li, xichao] univ chinese acad sci, beijing 100039, peoples r china
关键词Ti(3)Aic(2) Oxidation Flexural Strength Hardness Bending Test Acoustic Emission
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China [51571205, 51271191]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78092
专题中国科学院金属研究所
通讯作者Li, MS (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Li, Xichao,Zheng, Lili,Qian, Yuhai,et al. Effects of High Temperature Oxidation on Mechanical Properties of Ti3AlC2[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2017,33(6):596-602.
APA Li, Xichao,Zheng, Lili,Qian, Yuhai,Xu, Jingjun,Li, Meishuan,&Li, MS .(2017).Effects of High Temperature Oxidation on Mechanical Properties of Ti3AlC2.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,33(6),596-602.
MLA Li, Xichao,et al."Effects of High Temperature Oxidation on Mechanical Properties of Ti3AlC2".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 33.6(2017):596-602.
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