School of Materials Science and Engineering
Georgia Institute of Technology

Current Research

High Rate Deformation of Two-Phase Permanent Magnets for Texture Development.

Historically the best available magnetic materials have doubled in magnetic energy density every 12-15 years. The previous development of new phases, such as Samarium-Cobalt and Neodymium-Iron-Boron, led to smaller, more-efficient electro-mechanical systems and enabled new applications for permanent magnets. Development of Neodymium-Iron-Boron, the current state-of-the-art material, is nearing the theoretical limit. One method for continuing the advance of permanent magnetic materials is to develop a two-phase system which takes advantage of the higher magnetization of some soft (non-permanent) magnetic materials. The use of high strain rates in processing two-phase magnetic powders provides unique advantages in overcoming difficulties in both consolidation to high density and production of texture, two important factors for achieving high magnetic energy density. Other research includes: Shock Consolidation of Samarium-Iron-Nitride and Iron-Nitride Powders. Compaction Behavior of Nanoparticles.

Skills

Impact Testing: Taylor, Parallel Plate Shock Compression, Powder Shock Consolidation.
X-Ray Diffraction: Single/Multiphase ID, Internal Standards, Lattice Constants, Williamson-Hall, Rietveld, Residual Stress, Pole Figure.
SEM: High Res SEM and EDS.
TEM: Powder Samples at Low Res.
Computing: Experience with AUTODYN numerical simulations. Basic skills in PERL, MATLab, and XML.
Mechanical Testing: Charpy, Microhardness, Tensile, Compression, Powder Compaction.
Machining: Experience with lathe and mill on standard engineering materials.
Additional Information: Awesome.