Hot isostatic pressure synthesis of MgB2 from sonochemically modified precursors

ORAL

Abstract

Close to theoretical density bulk MgB2 was obtained by hot isostatic pressing (HIP) from precursors subject to high-intensity ultrasonic treatment. Comparative results obtained on unmodified and sonicated boron of various purities (from 80{\%} to 99{\%}) and in combination with various phases of magnesium are reported. Samples made from sonicated precursors showed improvements in superconducting properties without affecting Tc. Analysis of magnetization, SEM images, and XRD will be presented.

*Supported by NSF Grant DMR-06-03841 and the Alfred P. Sloan Research Foundation

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Authors

  • Brett A. McCarty

    • Ames Laboratory and Department of Physics \& Astronomy, Iowa State University, Ames IA 50011

  • Amanda Toomey

    • Ames Laboratory and Department of Physics \& Astronomy, Iowa State University, Ames IA 50011

  • Ruslan Prozorov

    • Ames Laboratory and Department of Physics \& Astronomy, Iowa State University, Ames IA 50011
    • Ames Lab. and Dept. Phys. and Astron., Iowa State Univ., Ames, IA 50011
    • Ames Laboratory and Department of Physics \& Astronomy, Iowa State University, Ames, Iowa 50011