As highly integrated circuits continue to advance,accompanied by a growing demand for energy efficiency and weight reduction,materials are confronted with mounting challenges pertaining to thermal conductivity and lig...As highly integrated circuits continue to advance,accompanied by a growing demand for energy efficiency and weight reduction,materials are confronted with mounting challenges pertaining to thermal conductivity and lightweight properties.By virtue of numerous intrinsic mechanisms,as a result,the thermal conductivity and mechanical properties of the Mg alloys are often inversely related,which becomes a bottleneck limiting the application of Mg alloys.Based on several effective modification methods to improve the thermal conductivity of Mg alloys,this paper describes the law of how they affect the mechanical properties,and clearly indicates that peak aging treatment is one of the best ways to simultaneously enhance an alloy's thermal conductivity and mechanical properties.As the most frequently used Mg alloy,cast alloys exhibit substantial potential for achieving high thermal conductivity.Moreover,recent reports indicate that hot deformation can significantly improve the mechanical properties while maintaining,and potentially slightly enhancing,the alloy's thermal conductivity.This presents a meaningful way to develop Mg alloys for applications in the field of small-volume heat dissipation components that require high strength.This comprehensive review begins by outlining standard testing and prediction methods,followed by the theoretical models used to predict thermal conductivity,and then explores the primary influencing factors affecting thermal conductivity.The review summarizes the current development status of Mg alloys,focusing on the quest for alloys that offer both high thermal conductivity and high strength.It concludes by providing insights into forthcoming prospects and challenges within this field.展开更多
In this paper, we are concerned with the existence and multiplicity of no-node solutions of the Lazer-McKenna suspension bridge models by using the fixed point theorem in a cone.
The room-temperature plasticity of magnesium and its alloys is limited primarily by their hexagonal close-packed(HCP)crystal structure,which restricts the number of active slip systems available at room temperature.Th...The room-temperature plasticity of magnesium and its alloys is limited primarily by their hexagonal close-packed(HCP)crystal structure,which restricts the number of active slip systems available at room temperature.This limitation hinders their broader application in various industries.Consequently,enhancing the room-temperature plasticity of magnesium alloys is essential for expanding their usage.This review provides a comprehensive overview of the underlying mechanisms and strategies for enhancing room-temperature plasticity in magnesium alloys.The first section emphasizes the importance of improving plasticity in these materials.The second section uses bibliometric analysis to identify key research trends and emerging hotspots in the field.The third section explores the deformation mechanisms and factors that influence room-temperature plasticity.The fourth section discusses various methods for enhancing plasticity.The fifth section focuses on achieving a balance between strength and plasticity.Finally,the review concludes with insights into future prospects and challenges,offering guidance for the development of high-plasticity magnesium alloys and serving as a resource for both research and industrial applications.展开更多
基金financially supported by the National Key Research and Development Program of China(2022YFB3709300)the National Natural Science Foundation of China(Grant No.U2167213)+1 种基金the Sichuan Science and Technology Program,China(2023YFSY0016)the Chongqing Special Project of Science and Technology Innovation,China(cstc2021yszx-jcyjX0007)。
文摘As highly integrated circuits continue to advance,accompanied by a growing demand for energy efficiency and weight reduction,materials are confronted with mounting challenges pertaining to thermal conductivity and lightweight properties.By virtue of numerous intrinsic mechanisms,as a result,the thermal conductivity and mechanical properties of the Mg alloys are often inversely related,which becomes a bottleneck limiting the application of Mg alloys.Based on several effective modification methods to improve the thermal conductivity of Mg alloys,this paper describes the law of how they affect the mechanical properties,and clearly indicates that peak aging treatment is one of the best ways to simultaneously enhance an alloy's thermal conductivity and mechanical properties.As the most frequently used Mg alloy,cast alloys exhibit substantial potential for achieving high thermal conductivity.Moreover,recent reports indicate that hot deformation can significantly improve the mechanical properties while maintaining,and potentially slightly enhancing,the alloy's thermal conductivity.This presents a meaningful way to develop Mg alloys for applications in the field of small-volume heat dissipation components that require high strength.This comprehensive review begins by outlining standard testing and prediction methods,followed by the theoretical models used to predict thermal conductivity,and then explores the primary influencing factors affecting thermal conductivity.The review summarizes the current development status of Mg alloys,focusing on the quest for alloys that offer both high thermal conductivity and high strength.It concludes by providing insights into forthcoming prospects and challenges within this field.
文摘In this paper, we are concerned with the existence and multiplicity of no-node solutions of the Lazer-McKenna suspension bridge models by using the fixed point theorem in a cone.
基金financially supported by the National Natural Science Foundation of China(Grant No.U2167213)the Chongqing Special Project of Science and Technology Innovation of China(CSTB2023YSZX-JCX0006)。
文摘The room-temperature plasticity of magnesium and its alloys is limited primarily by their hexagonal close-packed(HCP)crystal structure,which restricts the number of active slip systems available at room temperature.This limitation hinders their broader application in various industries.Consequently,enhancing the room-temperature plasticity of magnesium alloys is essential for expanding their usage.This review provides a comprehensive overview of the underlying mechanisms and strategies for enhancing room-temperature plasticity in magnesium alloys.The first section emphasizes the importance of improving plasticity in these materials.The second section uses bibliometric analysis to identify key research trends and emerging hotspots in the field.The third section explores the deformation mechanisms and factors that influence room-temperature plasticity.The fourth section discusses various methods for enhancing plasticity.The fifth section focuses on achieving a balance between strength and plasticity.Finally,the review concludes with insights into future prospects and challenges,offering guidance for the development of high-plasticity magnesium alloys and serving as a resource for both research and industrial applications.
