期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
A Self-Healing Elastomer with Extremely High Toughness Achieved by Acylsemicarbazide Hydrogen Bonding and Cu~(2+)-Neocuproine Coordination Interactions
1
作者 Xiao-Ming An Yi-Ping Wang +3 位作者 Tang-Song Zhu Chong Xing Xu-Dong Jia qiu-hong zhang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2024年第10期1425-1434,I0007,共11页
Elastomers with high mechanical toughness can guarantee their durability during service life.Self-healing ability,as well as recyclability,can also extend the life of materials and save the consuming cost of the mater... Elastomers with high mechanical toughness can guarantee their durability during service life.Self-healing ability,as well as recyclability,can also extend the life of materials and save the consuming cost of the materials.Many efforts have been dedicated to promoting the mechanical toughness as well as the self-healing capability of elastomers at the same time,while it remains a challenge to balance the trade-off between the above properties in one system.Herein we proposed a molecular design driven by dual interactions of acylsemicarbazide hydrogen bonding and Cu~(2+)-neocuproine coordination simultaneously.By introducing the reversible multiple hydrogen bonds and strong coordination bonds,we successfully fabricated an extremely tough and self-healing elastomer.The elastomer can achieve an impressive top-notch toughness of 491 MJ/m~3.Furthermore,it boasted rapid elastic restorability within 10 min and outstanding crack tolerance with high fracture energy(152.6kJ/m~2).Benefiting from the combination of dynamic interactions,the material was able to self-repair under 80℃conveniently and could be reprocessed to restore the exceptional mechanical properties. 展开更多
关键词 Metal-ligand coordination Hydrogen bond Ultra-tough elastomer SELF-HEALING
原文传递
Microstructures and mechanical properties of Ta-Nb-Zr-Ti-Al refractory high entropy alloys with varying Ta/Ti ratios 被引量:1
2
作者 Ya-Guang Dong Shang Chen +4 位作者 Nan-Nan Jia qiu-hong zhang Liang Wang Yun-Fei Xue Ke Jin 《Tungsten》 EI 2021年第4期406-414,共9页
The refractory high entropy alloys(RHEAs)containing disordered body-centered cubic(BCC)and ordered BCC(B2)structures often exhibit high strength but low ductility at room temperature,even in the compressive tests.In t... The refractory high entropy alloys(RHEAs)containing disordered body-centered cubic(BCC)and ordered BCC(B2)structures often exhibit high strength but low ductility at room temperature,even in the compressive tests.In this study,(Ta_(25-x)Nb_(25)Zr_(25)Ti_(25+x))95Al_(5)(x=0,5,10)RHEAs are fabricated to investigate the compositional dependence of the microstructures and mechanical properties.All the three alloys exhibit a single BCC structure at the as-cast and solution-treated states,while the basket weave-like microstructures consisting of cuboidal and strip-like phases are formed after aging at 600°C.The microstructure of the aged alloys is sensitive to the compositions:only disordered BCC1+BCC2 dual phases are observed in the(Ta_(25)Nb_(25)Zr_(25)Ti_(25))_(95)Al_(5)alloy;additional B2 phases are formed by replacing 5 at%Ta with Ti;a complex microstructure containing BCC1+BCC2+B2+Omega phases are identified in the(Ta_(15)Nb_(25)Zr_(25)Ti_(35))_(95)Al_(5)alloy.Although replacing Ta with Ti results in a reduction of compressive yield strength from 1762 to 1243 MPa,the fracture strain is greatly enhanced from 7.3 to 44.3%,indicating that the strength-ductility balance can be tuned to a large extent in this RHEA system. 展开更多
关键词 Refractory high entropy alloys Microstructure Mechanical properties Strength-ductility balance
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部