Fe50Ni50 synthesized by high energy ball milling: A systematic study using X-ray diffraction, EXAFS and Mossbauer methods

被引：20

作者：

Pena Rodriguez, V. A. ^{[1
]}

Rojas-Ayala, C. ^{[1
,2
]}

Medina Medina, J. ^{[1
]}

Paucar Cabrera, P. ^{[1
]}

Quispe-Marcatoma, J. ^{[1
,2
]}

Landauro, C. V. ^{[1
]}

Rojas Tapia, J. ^{[1
]}

Baggio-Saitovitch, E. M. ^{[2
]}

Passamani, E. C. ^{[3
]}

机构：

[1] Univ Nacl Mayor San Marcos, Fac Ciencias Fis, POB 14-149, Lima 14, Peru

[2] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil

[3] Univ Fed Espirito Santo, Dept Fis, BR-29075910 Vitoria, ES, Brazil

来源：

MATERIALS CHARACTERIZATION | 2019年 / 149卷

关键词：

Nanostructured materials; Mechanical alloying; X-ray diffraction; Extended X-ray absorption fine structure; Mossbauer spectroscopy; FE-NI; IRON-METEORITES; ORDERED FENI; COOLING RATE; TETRATAENITE; PHASE; SPECTROSCOPY; TRANSFORMATIONS; ALLOYS; SHEET;

D O I：

10.1016/j.matchar.2019.01.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fe50Ni50 alloy powder was prepared by milling the 1:1 stoichiometric mixture of Fe and Ni high purity elements using high energy vibrational ball-mill. Final powdered material was obtained directly after 30 h of milling process and the Rietveld analysis of the X-ray diffraction pattern of the sample reveals the presence of two Fe-Ni phases: the disordered gamma-(Fe45Ni55) alloy, with 91% of total fraction of the material (Fe-Ni solid solution plus grain boundary regions) and the chemically-ordered FeNi phase (9%), with L1(0) tetragonal structure. Average grain sizes of these Fe-Ni phases are respectively 60 nm and 20 nm. Results of extended X-ray absorption fine structure of Ni and Fe as well as Fe-57 Mossbauer spectroscopy also suggest the presence of atomically ordered FeNi phase. Mossbauer data have also shown that both Fe-Ni phases are magnetically ordered at room temperature. Our results indicate that high energy milling method can simulate extreme conditions of sample preparation required for the formation of the T-FeNi phase.

引用

页码：249 / 254

页数：6

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