Nb4AlC3:: A new compound belonging to the MAX phases

被引：154
作者：
Hu, Chunfeng
Li, Fangzhi
Zhang, Jie
Wang, Jiemin
Wang, Jingyang
Zhou, Yanchun
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
SCRIPTA MATERIALIA | 2007年 / 57卷 / 10期
关键词：
Nb4AlC3; ceramics; crystal structure;
D O I：
10.1016/j.scriptamat.2007.07.038
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nb4AlC3, a new compound belonging to the MAX phases, was discovered by annealing bulk Nb2AlC at 1700 degrees C. The crystal structure of Nb4AlC3 was determined by combined X-ray diffraction, high-resolution transmission electron microscopy and ab initio calculations. It was reported that Nb4AlC3 follows the Ti4AlN3-type crystal structure. The lattice constants are a = 0.31296 nm, c = 2.41208 nm and the atomic positions are Nb1 at 4f (1/3, 2/3, 0.0553), Nb2 at 4e (0, 0, 0.1574), Al at 2c (1/3, 2/3, 1/4), C1 at 2a (0, 0, 0) and C2 at 4f (2/3, 1/3, 0.1086). (c) 2007 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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页码：893 / 896
页数：4
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