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	Softest elastic mode governs materials hardness
	Rong Yu ; Qi Zhang ; Qian Zhan ; Rong Yu ; Qi Zhang ; Qian Zhan
	2016-03-30 ; 2016-03-30
关键词	Hardness Elastic constants Elastic eigenmodes Anisotropy TB301
其他题名	Softest elastic mode governs materials hardness
中文摘要	Single-crystal elastic constants and mechanical hardness of covalent and ionic crystals have been studied using first-principles calculations.The results show that the hardness is dominated by the softest elastic mode,not by the averaged elastic moduli as generally assumed.It reveals that the mechanical stability and anisotropy play an important role in determining the hardness of materials.The concept is then employed in designing hard alloys.By strengthening the softest elastic mode of tungsten carbide,which is the primary component in industrial hard alloys,we show that the carbide can be made even harder by alloying with nitrogen or rhenium via Fermi-level tuning.; Single-crystal elastic constants and mechanical hardness of covalent and ionic crystals have been studied using first-principles calculations.The results show that the hardness is dominated by the softest elastic mode,not by the averaged elastic moduli as generally assumed.It reveals that the mechanical stability and anisotropy play an important role in determining the hardness of materials.The concept is then employed in designing hard alloys.By strengthening the softest elastic mode of tungsten carbide,which is the primary component in industrial hard alloys,we show that the carbide can be made even harder by alloying with nitrogen or rhenium via Fermi-level tuning.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144028]
专题	清华大学
推荐引用方式 GB/T 7714	Rong Yu,Qi Zhang,Qian Zhan,et al. Softest elastic mode governs materials hardness[J],2016, 2016.
APA	Rong Yu,Qi Zhang,Qian Zhan,Rong Yu,Qi Zhang,&Qian Zhan.(2016).Softest elastic mode governs materials hardness..
MLA	Rong Yu,et al."Softest elastic mode governs materials hardness".(2016).

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