Trevor Clark, United States

Trevor holds a BSc in Materials Science & Engineering from the University of California, Riverside. He has experience working on projects ranging from functional ceramics to thermal physics of nanocrystalline superlattices. After graduating in 2015, he continued onto a PhD programme in Materials Science & Engineering, specifically working in powder metallurgy. His doctoral work is primarily an investigation into effects of grain refinement and grain boundary structure of iron silicon alloys to optimise electronic and magnetic properties.

Trevor has collaborated closely with scientists at the Pacific Northwest National Lab (PNNL) to develop materials that can drastically increase the effectiveness of electric motors.

Iron-Silicon Bulk Nanocrystalline Soft Magnetic Material

There has been a push to develop a magnetic material with minimal core loss for use in electric motors to improve efficiency. Laminated silicon steel has been one of the primary materials of interest because of its high permeability and low conductivity which reduce hysteresis loss. These properties can be further enhanced by tuning the microstructure to increase grain boundary scattering and thus resistivity of the material to reduce the need for the non-magnetic laminates.

This talk will discuss the results of high energy ball milling and sintering of silicon doped iron to produce nanograined silicon steels. The microstructure is studied to determine the effects of ball milling and sintering on grain size to determine the effects on resistivity and permeability. These findings will help to advance electric motor technology by improving efficiencies, and have widespread energy impacts.


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