Abstract
Superconducting MgB2 has been synthesized successfully by a modified infiltration and growth (IG) technique. The ambient pressure technique is relatively simple and scalable to complex shaped bulks. The extent of MgB 2 phase formation has been found to be influenced strongly by the IG process time and/or temperature, and this is found to reflect in the X-ray diffraction patterns, magnetization measurements, and microhardness. Scanning electron microscopy images show a bimodal particle size distribution with 20–50 nm sized fine precipitates in the inter particle region. A critical current density of 400 $\mbox{kA}\cdot\mbox{cm}^{-2}$ was measured at 5 K.
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