Oxygen and Hydrogen Reaction “In situ” with Magnesium and Tantalum in a Mechanical Milling System When a Solvent is Used
José Luis Iturbe-García *
Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca s/n, la marquesa, C.P. 52045, Ocoyoacac, Estado de México, México
Beatriz Eugenia López-Muñoz
Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca s/n, la marquesa, C.P. 52045, Ocoyoacac, Estado de México, México
*Author to whom correspondence should be addressed.
Abstract
The purpose of this paper is study the preparation “in situ” of magnesium–tantalum phases when reacted with oxygen and hydrogen during a mechanical milling process. Different phases were formed as function of the milling time. High energy ball milling was utilized to prepare hydrogenated compounds by controling the milling between 5 and 20 hours with a ball powder weight ratio of 10 and using methanol as the control agent. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the compounds. The XRD results at 20 h of milling revealed that only hydrogenated species (Ta2H and TaH0.5) and Mg(OH)2 were present.
Keywords: Tantalum hydrides, high energy ball milling, solvent dissociation, XRD, SEM