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题名: In situ synthesis, structure, and properties of bulk nanolaminate YAl3C3 ceramic
作者: Zhao, Guorui;  Chen, Jixin;  Li, Yueming;  Zheng, Liya;  Li, Jialin;  Wang, Xiaohui;  Li, Meishuan
发表日期: 2017
摘要: Polycrystalline YAl3C3 ceramic was fabricated by an in situ hot-pressing process using YH2, Al, and C powders as starting materials. The crystal structure of YAl3C3 was determined by X-ray diffraction and ab initio calculations to be a hexagonal space group P6(3)/mmc. The lattice parameters are a = b = 3.424 angstrom, c = 17.291 angstrom, and the atomic positions are Y at 2a (0, 0, 0), Al1 at 2d (1/3, 2/3, 3/4), Al2 at 4f (1/3, 2/3, 0.138), Cl at 2c (1/3, 2/3, 1/4), and C2 at 4f (1/3, 2/3, 0.6045). The reaction synthesis path for YAl3C3 was presented. Microstructure observations revealed that YAl3C3 ceramic had plate-like grain morphology. The elastic, mechanical and thermal properties of YAl3C3 were investigated. Most significantly of all, the Young's modulus of YAl3C3 could retain 276 GPa (85% of that at room temperature) at 1500 degrees C, suggesting that YAl3C3 is a promising lightweight high temperature structural material. (C) 2016 Elsevier Ltd. All rights reserved.
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Recommended Citation:
Zhao, Guorui,Chen, Jixin,Li, Yueming,et al. In Situ Synthesis, Structure, And Properties Of Bulk Nanolaminate Yal3c3 Ceramic[J]. Journal Of The European Ceramic Society,2017,37(1):83-89.

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