INVESTIGADORES
ESQUIVEL Marcelo Ricardo Oscar
artículos
Título:
Mechanochemical synthesis of La0.67Ce0.21Nd0.08Pr0.04Ni5
Autor/es:
V. BLANCO; M.R. ESQUIVEL
Revista:
ADVANCED POWDER TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam-Holanda; Año: 2013 vol. 24 p. 86 - 92
ISSN:
0921-8831
Resumen:
Abstract: The mechanochemical synthesis of a La0.67Ce0.21Nd0.08Pr0.04Ni5-xFex intermetallic is studied. The intermetallic is synthesized from a mixture of LaNi5 and La0.25Ce0.52Nd0.17Pr0.06Ni5. The processes controlling the mechanical alloying are characterised as a function of integrated milling time (tm). Effects of fracture and cold welding on the sample are identified by scanning electron microscopy. Compositional, microstructructural and structural changes are analysed by energy dispersive spectroscopy and X-ray diffraction. . The intermetallic compound is annealed in Ar to increase crystallite size and to release strain. The structure is refined by the Rietveld method. Cell parameters are a = 4.984(2) Å and c = 3,990(9) Å, respectively. The advantage of the synthesis method using intermetallics instead of metals/alloys is discussed along with the characteristics of the powder obtained.
