Evolution of Fe environments in mechanically alloyed Fe–Nb–(B) compositions

• Published in: Journal of alloys and compounds Vol. 615; pp. S555 - S558
• Main Authors: Blázquez, J.S., Ipus, J.J., Conde, C.F., Conde, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier B.V 05.12.2014; Elsevier
• Subjects: Alloys; Boron; Comminution; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystallites; Diffraction; Evolution; Exact sciences and technology; Iron; Materials science; Mechanical alloying; Mössbauer spectroscopy; Nanocrystalline alloys; Nanocrystalline materials; Nanocrystals; Nanoscale materials and structures: fabrication and characterization; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Physics; Structure of solids and liquids; crystallography; Nanocrystalline alloys; Mechanical alloying; Mössbauer spectroscopy; Moessbauer effect; Solid inclusion; Niobium alloys; XRD; Boron alloys; Fabrication structure relation; Microstructure; Nanocrystal; Iron base alloys; Transition element alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.11.118

•Nb is rapidly incorporated to the nanocrystalline FeNb(B) matrix.•B inclusions remains even after long milling times.•B is helpful to enhance the comminuting of crystallites. Nanocrystalline alloys of nominal composition Fe85Nb5B10 were produced by mechanical alloying from a mixture of elemental powders. Two commercial boron structures were used: amorphous and crystalline. In addition, a third composition Fe94.4Nb5.6 was prepared for comparison. X-ray diffraction and Mössbauer spectroscopy were used to describe the evolution of the microstructure and Fe environments as a function of the milling time. Whereas Nb is rapidly incorporated into the nanocrystalline matrix, boron inclusions remain even after long milling times. The presence of boron is found to enhance the comminuting of crystallites.