Shock wave consolidated MgB2 bulk samples

An analysis of load-depth data in depth-sensing microindentation experiments for intermetallic MgB2

“…Besides, the calculated values of the present work are comparable with the results of other works in the literature. In the literature, the microhardness and reduced modulus of intermetallic MgB 2 specimens have values falling within the range of H = 0.5-12.79 GPa, E = 19-80.5 GPa [9][10][11][12]. It is obviously seen from the literature that the reported microhardness and reduced modulus values show a significant variation.…”

“…On the other hand, the mechanical properties such as hardness, elastic modulus, fracture toughness, ductility, etc., are as important as the critical temperature, the critical current density, and the critical magnetic field for industrial applications of superconductor materials. Accordingly, the MgB 2 superconductors have higher mechanical strength than the other HTc ceramic superconductor materials [8][9][10][11][12]. Therefore, investigation of the mechanical properties of intermetallic MgB 2 superconductors for potential application in industry is important.…”

“…In the literature, a few studies deal with the mechanical behavior of MgB 2 superconductors via conventional experimental procedure [9][10][11][12]. According to our best knowledge, depth sensing indentation analysis has not been performed on intermetallic MgB 2 materials, although the depth sensing experiment is more precise than the conventional experimental procedure.…”

Synthesis of bulk MgB2 superconductors by pulsed electric current

“…Until now, simultaneous synthesis from pure elements and consolidation or sintering of MgB 2 commercial powders under extremely high isostatic pressures as high as several GPa10, 11 or hot uniaxial pressing in the range 30‐100 MPa12, 13 have been effective to obtain MgB 2 bulk specimens. In addition, various other methods, such as liquid Mg infiltration of boron preforms,14 microwave synthesis,15 or shock wave consolidation of pre‐alloyed powders,16 have been proposed to synthesize bulk MgB 2 .…”

Equal channel angular extrusion (ECAE) of intermetallics

“…Even though the critical temperature of MgB 2 is three times lower than the mercury based high T C superconductors (HTSC) cuprates (134 K [24,112,[126][127][128], hot pressing [129], magnetic compression [25], shock wave consolidation [26]. The mechanical properties of MgB 2 bulks prepared by all the above techniques are detailed in Table 2.1.…”