Structural characterization of nanostructured Fe-8P powder mixture.
Nanostructured Fe-8P (wt%) powder mixture was prepared by high energy ball milling in a planetary ball mill (Fritsch P7) under argon atmosphere. The morphology of the particles, the phase identification and the alloying evolution process as a function of milling time are studied by scanning electron microscopy (SEM), X-ray diffraction (XRD) and 57Fe Mössbauer spectrometry (MS), respectively. Refinement based on Rietveld method of the XRD patterns and the Mössbauer spectra analysis show that the Fe(x)P (1 < x < 2) and Fe2P phosphide phases are the main product after 3 h of milling (approximately 10%). From the XRD Rietveld refinement, it is observed that the Fe2P phase disappears completely after 12 h of milling, while the Fe3P nanophase appears after 9 h and remains for larger milling duration. The lattice structure distortion is evidenced by the lattice parameter changes of the milled products. A two structure state of the alpha-Fe(P) solid solution: alpha-Fe1 and alpha-Fe2 is confirmed by both the XRD and MS measurements. After milling for 21 h, a mixture of a disordered two phase alpha-Fe(P) solid solution, Fe3P nanophase and a small amount of a paramagnetic FeP phosphide phase (approximately 2%) is obtained.
Laboratoire de Magnétisme et Spectroscopie des Solides (LM2S), département de Physique, Faculté des Sciences, Université de Annaba, B. P. 12 Annaba 23000, Algérie.
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Tebib
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Alleg
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Bensalem
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Bensebaa
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Bentayeb
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Suñol
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Grenèche
D045424:Complex Mixtures / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D007501:Iron / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011208:Powders; D013499:Surface Properties
D045424:Complex Mixtures; D046911:Macromolecular Substances; D011208:Powders; D007501:Iron