Date of Award
Master of Science
Mechanical and Aerospace Engineering
Masters Thesis-Open Access
Non-stoichiometric samples of the AB5 system defined by the formula La1-yNi5+2y and LaNi5+2xGa1-x were cast using an arc-melting furnace. The samples were then analyzed to determine their lattice parameters and phases present using XRD. They were then heat-treated to produce homogeneous compounds and quenched with the intention of retaining high temperature compositions. Following the heat-treatment, the alloys underwent XRD again as well as SEM/EDS. The XRD information was analyzed using Rietveld refinement and the elemental data derived from the EDS was used to ascertain the compositions were statistically akin to the weighed values. The Micrographs were used to determine what happened to the compound during heat-treatment and whether that step is in fact necessary.
Wethey, "The Effect of Non-Stoichiometry on the Structure of La-Ni and La-Ni-Ga Alloys" (2003). Master's Theses. 1404.