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Atomic-scale microstructure of Hf2Al4C5 ceramic synthesized by spark plasma sintering
Song, Kepeng; Zhang, Hui; Du, Kui; Qi, Dongqing; Chen, Houwen; Wang, Xiaohui; Nie, Jian-Feng; Ye, Hengqiang; Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China.
2017-07-01
发表期刊JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN0002-7820
卷号100期号:7页码:3208-3216
摘要A layered ternary carbide phase, Hf2Al4C5, was successfully synthesized by spark plasma sintering method. Detailed (atomic-scale) microstructure of the ternary carbide was investigated by aberration-corrected scanning transmission electron microscopy and atomic-resolution energy dispersive X-ray spectroscopy. Hf2Al4C5 crystal grains have elongated morphologies and are characterized with a high density of stacking faults with the insertion of additional (Al4C3) or (HfC) units. Periodic stacking of Hf2Al4C5 and HfAl4C4 units along the [0001] direction is frequently observed in the Hf2Al4C5 crystal, and it leads to the formation of Hf4Al12C13, which consists of 2/3 Hf2Al4C5 unit cell and 1/2 HfAl4C4 unit cell. In addition, Z-shaped planar defects are observed in Hf2Al4C5 grains, and the formation mechanism of the Z-shaped defects was proposed as blocking effects of the Hf diffusion in Al4C3 by pre-existing {1-101} pyramidal stacking faults in Al4C3.
部门归属[song, kepeng ; zhang, hui ; du, kui ; qi, dongqing ; wang, xiaohui ; ye, hengqiang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang, peoples r china ; [qi, dongqing] northeastern univ, sch mat sci & engn, shenyang, peoples r china ; [chen, houwen ; nie, jian-feng] chongqing univ, sch mat sci & engn, chongqing, peoples r china ; [nie, jian-feng] monash univ, dept mat sci & engn, melbourne, vic, australia
关键词Microstructure Spark Plasma Sintering Stacking Fault Transition Metal Ternary Compounds Transmission Electron Microscopy
学科领域Materials Science, Ceramics
资助者National Natural Science Foundation of China [51371177, 51521091, 51390473]
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/321006/78061
专题中国科学院金属研究所
通讯作者Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China.
推荐引用方式
GB/T 7714
Song, Kepeng,Zhang, Hui,Du, Kui,et al. Atomic-scale microstructure of Hf2Al4C5 ceramic synthesized by spark plasma sintering[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2017,100(7):3208-3216.
APA Song, Kepeng.,Zhang, Hui.,Du, Kui.,Qi, Dongqing.,Chen, Houwen.,...&Du, K .(2017).Atomic-scale microstructure of Hf2Al4C5 ceramic synthesized by spark plasma sintering.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,100(7),3208-3216.
MLA Song, Kepeng,et al."Atomic-scale microstructure of Hf2Al4C5 ceramic synthesized by spark plasma sintering".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 100.7(2017):3208-3216.
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