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[IEEE 2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) - Berlin, Germany (2019.7.23-2019.7.27)] 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) - An Improved Liquid Metal Mask Printing enabled Fast Fabrication of Wearable Electronics on Fabrics <sup>*</sup>
摘要： The rare earth con?guration entropy dependence of the crystal structure, microstructure and magnetic properties for SmCo5 based intermetallic compounds has been systematically investigated by using power X-ray diffraction, scanning electron microscopy with energy dispersive spectroscopy and magnetic measurement. The studies show that the single phase with CaCu5 type structure forms in (Sm1/2Nd1/2)Co5, (Sm1/3Nd1/3Y1/3)Co5 and (Sm1/4Nd1/4Y1/4Tb1/4)Co5. The formation of single phase is derived from Miedema's model due to the mixing enthalpy of 0 kJ$mol(cid:1)1 at rare earth site. The high entropy (Sm1/4Nd1/4Y1/4Tb1/4)Co5 intermetallic compound is obtained due to its con?guration entropy of 1.39R and rare earth equiatomic ratio at Sm site. The morphologic images show that the grains are growing and agglomerating with doping equiatomic rare earth Y and Tb. The magnetization of sample cannot reach saturation within the maximum ?eld of 30 kOe at room temperature, the magnetizing curve follows the Langevin model for SmCo5 and (Sm1/2Nd1/2)Co5, and the modi?ed Langevin model for (Sm1/3Nd1/3Y1/3)Co5 and (Sm1/4Nd1/4Y1/4Tb1/4)Co5, respectively. The ?tted magnetization is going down with substitution of nonmagnetic Y and heavy rare earth Tb due to the diluting magnetic effect of nonmagnetic Y substitution for Sm and the weakened effects on moment of Tb moment arrangement antiparallel to that of Co. The coercivity tends to decrease due to the agglomeration and growth of grains. It implies that the con?guration entropy seems to have little effect on the room temperature magnetizing process.
关键词： High entropy,Single phase,SmCo5 intermetallic compound,Magnetic property
更新于2025-09-11 14:15:04
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Preparation of Amorphous Coatings of AlFeCoNiCuZrV Alloy by Direct Current Magnetron Sputtering Method
摘要： The amorphous coatings of AlFeCoNiCuZrV high entropy alloy were deposited by direct current magnetron sputtering (DCMS) in the mixed atmosphere of Ar and O2. A smooth amorphous coating was obtained. The microstructure and properties of the coatings were investigated. The results showed that the chemical composition, microstructure and mechanical properties of the amorphous coatings intimately relied on the concentration of O2 in the mixture atmosphere. When O2 flow ratio increased, the thickness and roughness of the coatings decreased. The maximum values of the hardness and the elastic modulus of the coating are 12 and 168 Gpa, respectively.
关键词： Properties,Amorphous coating,Magnetron sputtering,High entropy alloy
更新于2025-09-09 09:28:46