We measured the contact angles of Al and Sn drops on polycrystalline Al2O3 substrates in various high magnetic fields at different temperatures.The contact angles of both Al and Sn drops on the Al2O3 substrates decrea...We measured the contact angles of Al and Sn drops on polycrystalline Al2O3 substrates in various high magnetic fields at different temperatures.The contact angles of both Al and Sn drops on the Al2O3 substrates decreased under high magnetic fields.These decreases strongly depend on the temperature,magnetic flux density,magnetic properties of the metal drops,and the reactivity of the metal drops with Al2O3.Our results reveal that the wetting behavior of molten metal drops on ceramics can be modified by a high magnetic field.展开更多
The effect of a high magnetic field on the microstructural evolution of a peritectic Al—18 at.%Ni alloy during directional solidification and its dependence on pulling speed were investigated.At a low pulling speed,t...The effect of a high magnetic field on the microstructural evolution of a peritectic Al—18 at.%Ni alloy during directional solidification and its dependence on pulling speed were investigated.At a low pulling speed,the application of a 2 T magnetic field triggered the appearance of a primary Al_(3)Ni_(2)phase.At higher pulling speeds,a high magnetic field application induced primary Al_(3)Ni_(2)phase segregation that formed close to the central alloy regions.For all pulling speeds,the application of a high magnetic field induced bulk Al_(3)Ni/Al eutectic formation on the upper and lower parts of the alloys,and promoted elongated growth of the peritectic Al_3Ni phase along the magnetic field direction.Microstructural analysis indicated that microstructural evolution that was induced by high magnetic fields can be attributed to solute migration and melt flow that is regulated by magnetic,Lorentz,and thermoelectric magnetic forces and their coupling effects during peritectic solidification.展开更多
基金financially supported by the National Natural Science Foundation of China(Grant Nos.51774086,51574073,51425401,and 51690161)Fundamental Research Funds for the Central Universities(Grant Nos.N180915002,N170902002 and N170908001)Liaoning Innovative Research Team in University,China(Grant No.LT2017011).
文摘We measured the contact angles of Al and Sn drops on polycrystalline Al2O3 substrates in various high magnetic fields at different temperatures.The contact angles of both Al and Sn drops on the Al2O3 substrates decreased under high magnetic fields.These decreases strongly depend on the temperature,magnetic flux density,magnetic properties of the metal drops,and the reactivity of the metal drops with Al2O3.Our results reveal that the wetting behavior of molten metal drops on ceramics can be modified by a high magnetic field.
基金the National Natural Science Foundation of China(Nos.51690161,51774086,and 21701022)the Fundamental Research Funds for the Central Universities(Nos.N180915002,N170902002 and N170908001)Liaoning Innovative Research Team in University,China(No.LT2017011)。
文摘The effect of a high magnetic field on the microstructural evolution of a peritectic Al—18 at.%Ni alloy during directional solidification and its dependence on pulling speed were investigated.At a low pulling speed,the application of a 2 T magnetic field triggered the appearance of a primary Al_(3)Ni_(2)phase.At higher pulling speeds,a high magnetic field application induced primary Al_(3)Ni_(2)phase segregation that formed close to the central alloy regions.For all pulling speeds,the application of a high magnetic field induced bulk Al_(3)Ni/Al eutectic formation on the upper and lower parts of the alloys,and promoted elongated growth of the peritectic Al_3Ni phase along the magnetic field direction.Microstructural analysis indicated that microstructural evolution that was induced by high magnetic fields can be attributed to solute migration and melt flow that is regulated by magnetic,Lorentz,and thermoelectric magnetic forces and their coupling effects during peritectic solidification.
