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
	1998
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	14 期号:5 页码:441-446
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.
部门归属	acad sinica, inst met res, shenyang 110015, peoples r china. ne univ technol, coll sci, shenyang 110006, peoples r china. shenyang polytech univ, lab ultrafine particles, shenyang 110023, peoples r china.;dong, xl (reprint author), acad sinica, inst met res, shenyang 110015, peoples r china
关键词	Magnetic-properties
URL	查看原文
WOS记录号	WOS:000076214300013
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37650
专题	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.