David R. Poirier

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Ferromagnetic alloys, used in the form of "thermoseeds" for surgical implantation, have been developed and used to induce localized hyperthermia in cancerous growths. Alloys of nickel with approx. 4 wt.% Si were chosen for this study because they have Curie temperatures in the desired range of 45-60 degrees C. The thermoseeds were prepared by using either a(More)
A mathematical model of solidification is presented. The model simulates the formation of segregation defects known as “freckles” during directional solidification of binary alloys. The growth of the two-phase or dendritic zone is calculated by solving the coupled equations of momentum, energy, and solute transport, as well as maintaining the thermodynamic(More)
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