Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/96375
Title: Effects of Pressure, Temperature and Grain Size on Synthesis and Structures of Fe-N Alloys
Authors: Liu, L.
Yao, B. 
Zhao, X.-D.
Guo, K.-Y.
Ning, F.-L.
Su, W.-H.
Keywords: Crystal structure
Fe-N alloy
High pressure
Solid-state reaction
Issue Date: Jan-2002
Source: Liu, L.,Yao, B.,Zhao, X.-D.,Guo, K.-Y.,Ning, F.-L.,Su, W.-H. (2002-01). Effects of Pressure, Temperature and Grain Size on Synthesis and Structures of Fe-N Alloys. Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities 23 (1) : 9-. ScholarBank@NUS Repository.
Abstract: Effects of pressure, temperature and grain size on the solid state reaction between α-Fe and amorphous BN and crystal structures of the resultant of the reaction were studied by using mechanical milling and high pressure techniques at the temperatures ranging from 580 to 930 K under pressures between 1 × 10-3 Pa and 4 GPa. It was found that the pressures and refinement of grain size can greatly accelerate the solid state reaction process. There is a critical grain size for α-Fe, below which the reaction begins to occur. In the present experiment, this grain size was measured to be about 8 nm. The crystal structures of the resultants change with the variation of pressure and temperature. A new Fe-N alloy with orthorhombic structure was produced firstly at 2 GPa and 800 K. Single phase ε-Feα-N alloy can be obtained in the temperature range of 690 to 800 K at the pressures of 3 to 4 GPa. However, the resultant is not any Fe-N alloy but Fe3B alloy when the pressure is 4 GPa and the temperature is above 930 K.
Source Title: Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
URI: http://scholarbank.nus.edu.sg/handle/10635/96375
ISSN: 02510790
Appears in Collections:Staff Publications

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