检索结果-南通市图书馆

Serrated flow in NaI:Tl scintillator crystals

Journal of Materials Science & Technology 2023年第22期153卷 120-127页

作者： jamieson brechtl Xie Xie Rui Feng Gongyao Wang Charles Melcher Mariya Zhuravleva Peter K.Liaw The Bredesen Center for Interdisciplinary Research and Graduate Education The University of TennesseeKnoxvilleTN 37996USA Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996USA Scintillation Materials Research Center The University of TennesseeKnoxvilleTN 37996USA

The serrated-flow behavior is an important phenomenon that unveils material-deformation mechanisms,as reported for various kinds of materials.NaI doped with Tl(NaI:Tl)is unique among scintillation ma-terials in that the structure contains glide planes that are linked to serration behavior.In the present work,single crystals of NaI:Tl were subjected to room-temperature compression experiments at different strain rates.The serrated flow was observed,and complexity and multifractal analyses were performed to analyze the serration behavior.The findings revealed that the strain rate had a pronounced effect on the complexity and multifractality of the serrated flow,similar to what has been found in other alloy systems.The results also indicate that there may be a strong link between the complexity of the serrated flow behavior and the heterogeneity of the underlying dynamics.It is expected that the present work could be a step toward a better understanding of the deformation behavior and forgeability of NaI:Tl single crystals.

关键词： Dislocations Ceramic material Mechanical testing Numerical algorithms Scintillator

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

一种低密度耐高温高比强度多层次结构双相高熵合金

引用

Science China Materials 2023年第2期66卷 780-792页

作者：李亚耸廖卫兵陈怀灿 jamieson brechtl 宋温丽殷雯何占兵 Peter K.Liaw 张勇 Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Spallation Neutron Source Science Center Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China Energy and Transportation Science Division Oak RidgeTN37831USA Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science University of Science and Technology BeijingBeijing 100083China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China

本文研究了一种新型低密度(~6.24 g cm^(-3))双相AlTiVCoNi高熵合金,其组织结构由有序L21高熵金属间化合物、无序体心立方结构和纳米L21相多层次结构构成.该合金在1200℃+24 h热处理下未发生相结构转变,在此条件下具有优异的高温相结构... 详细信息

本文研究了一种新型低密度(~6.24 g cm^(-3))双相AlTiVCoNi高熵合金,其组织结构由有序L21高熵金属间化合物、无序体心立方结构和纳米L21相多层次结构构成.该合金在1200℃+24 h热处理下未发生相结构转变,在此条件下具有优异的高温相结构稳定性,其铸态和热处理态的压缩屈服强度相当,达到~1.6 GPa.另外,该合金在室温和600℃条件下表现出了优异的强塑性匹配和优异的比屈服强度,分别达到了约261和210 MPa g^(-1)cm^(3).该合金的超高强度主要源于有序L21相与体心立方相的半共格界面导致的一种强相结构稳定性和多层次结构的复合强化机制.该合金在800和1000℃压缩过程中出现了动态再结晶软化,使得其高温强度有所降低.这种“具有半共格界面L21+体心立方+纳米L21颗粒”的多层次结构设计为开发新型低密度耐高温高熵合金提供了一种新设计思路.

关键词：金属间化合物高熵合金体心立方双相多层次结构高比强度超高强度高温强度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fundamental electronic structure and multiatomic bonding in 13 biocompatible high-entropy alloys

引用

npj Computational Materials 2020年第1期6卷 1296-1305页

作者： Wai-Yim Ching Saro San jamieson brechtl Ridwan Sakidja Miqin Zhang Peter K.Liaw Department of Physics and Astronomy University of Missouri Kansas CityKansas CityMO 64110USA The Bredesen Center for Interdisciplinary Research and Graduate Education The University of TennesseeKnoxvilleTN 37996-3394USA Department of Physics Astronomy and Materials ScienceMissouri State UniversitySpringfieldMO 65897USA Department of Materials Science and Engineering The University of WashingtonSeattleWA 98195USA Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996-2100USA

High-entropy alloys(HEAs)have attracted great attention due to their many unique properties and potential applications.The nature of interatomic interactions in this unique class of complex multicomponent alloys is not fully developed or understood.We report a theoretical modeling technique to enable in-depth analysis of their electronic structures and interatomic bonding,and predict HEA properties based on the use of the quantum mechanical metrics,the total bond order density(TBOD)and the partial bond order density(PBOD).Application to 13 biocompatible multicomponent HEAs yields many new and insightful results,including the inadequacy of using the valence electron count,quantification of large lattice distortion,validation of mechanical properties with experiment data,modeling porosity to reduce Young’s modulus.This work outlines a road map for the rational design of HEAs for biomedical applications.

关键词： alloys bonding entropy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：