Ti-sheathed MgB2 wires doped with different amount of nanosized rare-earth oxide (Yb2O3, Gd2O3, and Dy2O3) and/or nanosized SiC were investigated. X-ray diffraction patterns suggested the existence of Mg2Si phase due to the SiC addition, while no any phase related to rare-earth oxide could be detected. Strong enhancement of in-field current carrying capability was observed on 2.5 wt.% Yb2O3 dop...

We perform hybrid-density functional calculations to investigate the charged defect formation energy of native point defects in Mg2Si, Mg2Sn, and their solid solutions. The band gap correction by is found be critical determine density these materials. For Mg interstitials are dominant provide unintentional n-type conductivity. Additionally, as vacancies can dominate Mg-poor p-type conductivity ...

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Thermal stability and the kinetics of the grain growth of nano-crystalline Mg-6Al-1Zn-1Si alloy prepared via mechanical alloying (MA) were investigated. It started with elemental powders, using a variety of analytical techniques including differential scanning calorimetry (DSC), X-ray diffraction method (XRD), and scanning electron microscopy (SEM) coupled with energy dispersive spectrometry (E...

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The Mg2Si intermetallic alloys have been prepared by using a powder metallurgy process. milling treatment of silicon as raw material to improve the formation phase was investigated in this research. un-milled and milled mixed with magnesium for 2 hours. powders were compacted stainless steel tubes sintered at 500 600°C 6 crystal structure identified X-ray diffractometer (XRD), while fracture su...

We present results from ab initio, self-consistent calculations of electronic, transport, and bulk properties cubic magnesium silicide (Mg2Si). employed a local density approximation (LDA) potential to perform the computation, following Bagayoko, Zhao, Williams (BZW) method, as improved by Ekuma Franklin (BZW-EF). The BZW-EF method guarantees attainment ground state well avoidance over-complete...