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| Kinetics of Nitrogen Diffusion in Granular Manganese |
| ZHANG Jin��zhu1,XU Chu��shao2,ZHAO Yue��ping1 |
| 1. College of Material Science and Metallurgy Engineering, Guizhou University, Guiyang 550003, Guizhou, China; 2. College of Material Science and Engineering, Chongqing University, Chongqing 400044, China |
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Abstract The kinetics and the influence of time on granular manganese nitriding were studied by means of a vacuum resistance furnace, X��ray diffraction technique, and LECO TC��436 oxygen/nitrogen determinator. The longer the nitriding time, the more the nitrogen pickup. Except for a trace of oxide MnO that developed, the metal manganese could thoroughly be nitrided to form Mn4N and a little �ƪ�phase (the stoichiometric components as Mn2N) with the nitriding time lasting. A kinetic model is developed to reveal the nitriding situation and agrees well with the experimental results.
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Received: 01 January 1900
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2008, Vol. 15 
