Mossbauer effect in ultrafine particles with Fe-C solid solution, gamma-Fe and Fe3C phases

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	Mossbauer effect in ultrafine particles with Fe-C solid solution, gamma-Fe and Fe3C phases
	X. L. Dong ; Z. D. Zhang ; X. G. Zhao ; Y. S. Chao ; S. R. Jin ; W. M. Sun
刊名	Journal of Materials Science & Technology
	1998
卷号	14 期号:5 页码:441-446
关键词	magnetic-properties
ISSN号	1005-0302
中文摘要	Ultrafine particles prepared by evaporating pure Fe in CH4 atmosphere using arc-discharge-heating method. were found to consist of Fe-C solid solution, gamma-Fe and Fe3C phases. Effect of annealing temperature on phase transformation and hyperfine interactions has been investigated by Mossbauer spectroscopy, X-ray diffraction (XRD), differential thermal analysis and thermogravimetry (DTA-TG), transmission electron microscopy (TEM), oxygen determination and vibrating sample magnetometer (VSM) measurements. It was observed that phase transformation of gamma-Fe to alpha-Fe occurs during annealing in vacuum. The mechanism causing the change of hyperfine interactions with annealing temperature differs for Fe-C solution and interstitial compounds. Difference of hyperfine interactions of Fe-C solid solution in the starting sample and its annealed samples is ascribed to the improvement of activation of interstitial carbon atoms. Stress-relieving in structure of annealed Fe3C particle can result in a weak influence on hyperfine interactions. Parameters fitted to the Mossbauer spectra show the existence of superparamagnetism in all the samples. Absorbed and combined oxygen on particle surface of the starting sample were determined.
原文出处	://WOS:000076214300013
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37650]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	X. L. Dong,Z. D. Zhang,X. G. Zhao,et al. Mossbauer effect in ultrafine particles with Fe-C solid solution, gamma-Fe and Fe3C phases[J]. Journal of Materials Science & Technology,1998,14(5):441-446.
APA	X. L. Dong,Z. D. Zhang,X. G. Zhao,Y. S. Chao,S. R. Jin,&W. M. Sun.(1998).Mossbauer effect in ultrafine particles with Fe-C solid solution, gamma-Fe and Fe3C phases.Journal of Materials Science & Technology,14(5),441-446.
MLA	X. L. Dong,et al."Mossbauer effect in ultrafine particles with Fe-C solid solution, gamma-Fe and Fe3C phases".Journal of Materials Science & Technology 14.5(1998):441-446.