Owing to the nonequilibrium nature,the energy state of metallic glasses(MGs)can vary a lot and has a critical influence on the physical properties.Exploring new methods to modulate the energy state of glasses and stud...Owing to the nonequilibrium nature,the energy state of metallic glasses(MGs)can vary a lot and has a critical influence on the physical properties.Exploring new methods to modulate the energy state of glasses and studying its relationship with properties have attracted great interests.Herein,we systematically investigate the energy state,mixing entropy and physical properties of Zr–Ti–Cu–Ni–Be multicomponent high entropy MGs by experiments and simulations.We find that the energy state increases along with the increase of mixing entropy.The yield strength and thermal stability of MGs are also enhanced by high mixing entropy.These results may open a new door on regulation of energy states and thus physical properties of MGs.展开更多
We thank Dr.Ristic and Dr.Babic for their interests in our work and for reminding us about their works on metallic glasses.Metallic glasses are a family of materials with disordered atomic packing structure,which make...We thank Dr.Ristic and Dr.Babic for their interests in our work and for reminding us about their works on metallic glasses.Metallic glasses are a family of materials with disordered atomic packing structure,which makes it quite challenging to design new advanced metallic glasses and makes it charming to understand the relative physical mechanisms.展开更多
A crucial step in creating cutting-edge soft magnetic alloys is the nanocrystallization of Fe-based amorphous alloys.However,it is unclear how the thermal history affects the nanocrystallization.In this work,high-prec...A crucial step in creating cutting-edge soft magnetic alloys is the nanocrystallization of Fe-based amorphous alloys.However,it is unclear how the thermal history affects the nanocrystallization.In this work,high-precision nanocalorimetry and in-situ hightemperature transmission electron microscopy are used to systematically examine how the pre-annealing relaxation process affects the nanocrystallization of Fe-based amorphous alloys.We discover that the glass with more thermal energy storage will crystallize into superb nanocrystalline structures with exceptionally advanced soft magnetism.The soft magnetic properties of Fe-B nanocrystalline alloys can be improved by increasing the relaxation temperature.This finding provides solid and clear evidence for the influences of thermal history on crystallization behavior for Fe-based amorphous alloys,which is helpful for designing advanced soft magnetic nanocrystalline alloys.展开更多
基金financial supports from the National Key R&D Program of China(Grant Nos.2018YFA0703602 and 2018YFA0703604)the National Natural Science Foundation of China(Grant Nos.51922102 and 51827801)+1 种基金Youth Innovation Promotion Association CAS(Grant No.2019296)the Zhejiang Provincial Natural Science Foundation of China(Grant No.LR22E010004)。
文摘Owing to the nonequilibrium nature,the energy state of metallic glasses(MGs)can vary a lot and has a critical influence on the physical properties.Exploring new methods to modulate the energy state of glasses and studying its relationship with properties have attracted great interests.Herein,we systematically investigate the energy state,mixing entropy and physical properties of Zr–Ti–Cu–Ni–Be multicomponent high entropy MGs by experiments and simulations.We find that the energy state increases along with the increase of mixing entropy.The yield strength and thermal stability of MGs are also enhanced by high mixing entropy.These results may open a new door on regulation of energy states and thus physical properties of MGs.
文摘We thank Dr.Ristic and Dr.Babic for their interests in our work and for reminding us about their works on metallic glasses.Metallic glasses are a family of materials with disordered atomic packing structure,which makes it quite challenging to design new advanced metallic glasses and makes it charming to understand the relative physical mechanisms.
基金supported by the National Key R&D Program of China (2018YFA0703600)the National Natural Science Foundation of China (51922102, 52001319, 52271158, 92163108, and 52231006)+2 种基金Zhejiang Provincial Natural Science Foundation (LGF22E010002, LZ22A030001, and LR22E010004)the “Pioneer and Leading Goose” R&D Program of Zhejiang (2022C01023)Ningbo Key Scientific and Technological Project (2019B10051)。
基金supported by the“Pioneer and Leading Goose”R&D Program of Zhejiang(Grant No.2022C01023)National Natural Science Foundation of China(Grant Nos.52101205,92163108,51922102,52001319,and 51971239)+1 种基金Hunan Key Laboratory of Design and Manufacture of Electromagnetic Equipment under the Open Foundation(Grant No.DC202005)Zhejiang Provincial Natural Science Foundation of China(Grant No.LGF22E010002).
文摘A crucial step in creating cutting-edge soft magnetic alloys is the nanocrystallization of Fe-based amorphous alloys.However,it is unclear how the thermal history affects the nanocrystallization.In this work,high-precision nanocalorimetry and in-situ hightemperature transmission electron microscopy are used to systematically examine how the pre-annealing relaxation process affects the nanocrystallization of Fe-based amorphous alloys.We discover that the glass with more thermal energy storage will crystallize into superb nanocrystalline structures with exceptionally advanced soft magnetism.The soft magnetic properties of Fe-B nanocrystalline alloys can be improved by increasing the relaxation temperature.This finding provides solid and clear evidence for the influences of thermal history on crystallization behavior for Fe-based amorphous alloys,which is helpful for designing advanced soft magnetic nanocrystalline alloys.
