2012
J.A. Betancourt-Cantera, F. Sánchez-De Jesús, G. Torres-Villaseñor, A.M. Bolarín-Miró, C.A. Cortés-Escobedo, (2012). Extended solid solubility of a Co?Cr system by mechanical alloying. Journal of Alloys and Compounds 529, 58? 62. doi:10.1016/j.jallcom.2012.03.082.
Abstract
Mechanical alloying, MA, has been successfully used to extend the limits of solid solubility in many commercially important metallic systems. The aim of this work is to demonstrate that MA modifies the solid solubility of the Co-Cr system. Co and Cr elemental powders were used as precursors and mixed in an adequate weight ratio to obtain Co100-xCrx (0?x?100, ?x=10) to study the effect of mechanical processing in the solubility of the Co-Cr system. Processing was carried out at room temperature in a shaker mixer mill using vials and balls of hardened steel as milling media with a ball:powder weight ratio of 10:1. Crystalline structure characterization of the milled powders was conducted using X-ray diffraction, and phase transformations as a function of composition were analyzed. Thermal analysis confirmed structural changes occurred in the mechanically alloyed powders. The evolution of the phase transformations with composition is reported for each composition. The results showed that after high energy ball milling for 7 h, the solid solubility between Co and Cr could be evidently extended, despite the low solid solubility at the equilibrium conditions of this system. Additionally, the micrographs of the milled powders showed that increasing composition of chromium changes the shape and size of the particles while simultaneously reducing their agglomeration; this effect is possibly attributed to the brittleness of elemental chrome.
SÍNTESIS DE NiMn2O4 ASISTIDA MEDIANTE MOLIENDA DE ALTA ENERGÍA A PARTIR DE MEZCLAS DE NiO-MnO
CARACTERIZACIÓN DE FERRITA DE MANGANESO OBTENIDA POR MECANOSÍNTESIS
Amorphization of Co-base alloy by mechanical alloying
OBTENCION DE Co-27Cr-6Mo MEDIANTE ALEADO MECANICO PARA POSIBLES APLICACIONES BIOMÉDICAS
CARACTERIZACIÓN DE FERRITA DE MANGANESO OBTENIDA POR MECANOSÍNTESIS.
MECANOSÍNTESIS DE MANGANITAS DE LANTANO: EFECTO DE LA RELACIÓN EN PESO BOLAS:POLVO
Amorphization of Co-base alloy by mechanical alloying
EFECTO DE LA CONTAMINACIÓN POR Fe SOBRE La1-XCaXMnO3 (0
Estabilidad térmica de manganitas tipo La1-xCaxMnO3 obtenidas mediante mecanosíntesis