Collaborative Research: Study of the Connections between Ordering, Dynamics and Glass Forming Ability in Metallic Liquid
合作研究:金属液体中有序性、动力学与玻璃形成能力之间的联系研究
基本信息
- 批准号:1904281
- 负责人:
- 金额:$ 28.09万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-09-01 至 2024-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Non-Technical Summary:Metallic glasses, which were only discovered about a half-century ago, have the potential to become transformative materials. However, two things are needed before this can happen - an improved understanding of which metallic liquids can be made into glasses and an ability to tailor these glasses to meet specific demands. There is evidence that the properties of metallic liquids near their melting temperatures are important for reaching these goals. Near the melting temperature, the shear viscosity (a measure of how easily a liquid flows) shows a change in how it increases with decreasing temperature. There is experimental evidence that this change is linked to changes in the atomic structure of the liquid. One goal of this research is to develop a deeper understanding of these processes at high temperature. A second goal is to combine this knowledge with measurements of the structures of the liquids and the crystal phases that can form from them to develop a model that predicts metallic glass formation. The new insight that will result from these studies will be of broad interest to the academic and industrial glass science community. A third goal is to develop a model of collaborative research that connects communities in different regions and of different sizes. This collaborative research effort between a small Liberal Arts College and a larger R1 University will work to combat national reductions in students seeking training in STEM fields in both communities. Undergraduate and graduate students will participate in research at academic institutions and at national laboratories, giving them valuable experience for deciding on their future educational and career paths. At the same time, the collaboration will develop a model for broad community engagement that uses modern technology to open up access routes for underserved communities to cutting-edge science and science education.Technical Summary:While metallic glasses have the potential to be transformative materials, an improved ability to identify and develop new glasses to meet changing demands is critically important. Studies suggest that the properties of the high temperature liquids are indicators of glass formation. Of particular importance is a structurally induced crossover in the properties of the shear viscosity of metallic alloy liquids at a temperature TA, which is near the liquidus temperature. Evidence suggests that the processes that begin at TA ultimately lead to the glass transition at lower temperatures. Predictions of the glass transition temperature based on the fragility of the liquid (determined from the shear viscosity) and the thermal expansion coefficient at TA are in good agreement with experimental data for the glasses studied. This research is focused on gaining a deeper understanding of the crossover at TA and developing a better predictor for glass formation that is based on fundamental properties of the liquid and the crystal phases that form from it. The experimental research will focus on quasi-elastic and inelastic neutron and high energy X-ray scattering studies of containerless-processed liquids and measurements of their viscosity and density as a function of temperature. Molecular dynamics studies will be used to guide these studies and to interpret the data obtained. The new insights developed in this proposal will be of interest to those interested in metallic alloy development as well as the broader glass community, including those working on silicate and chalcogenide glasses. These activities mirror a broad approach for accelerated materials development that is a national priority. The research collaboration between a Liberal Arts College and a R1 University will play an important role in the training of both undergraduate and graduate students in academia and at national laboratories, where they will learn cutting edge X-ray and neutron scattering techniques and computer modeling.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
非技术总结:金属玻璃大约在半个世纪前才被发现,有可能成为变革性材料。 然而,在此之前需要做两件事-更好地了解哪些金属液体可以制成玻璃,以及定制这些玻璃以满足特定需求的能力。 有证据表明,金属液体在其熔化温度附近的性质对于实现这些目标非常重要。 接近熔化温度时,剪切粘度(液体流动容易程度的量度)显示出随温度降低而增加的变化。 有实验证据表明,这种变化与液体原子结构的变化有关。 这项研究的一个目标是更深入地了解高温下的这些过程。 第二个目标是联合收割机将这些知识与液体结构的测量和可以从它们形成的晶相结合,以开发预测金属玻璃形成的模型。 从这些研究中得出的新见解将引起学术界和工业玻璃科学界的广泛兴趣。 第三个目标是开发一种合作研究模式,将不同地区和不同规模的社区联系起来。 一所小型文理学院和一所较大的R1大学之间的这种合作研究工作将致力于打击两个社区寻求STEM领域培训的学生的国家减少。 本科生和研究生将参加学术机构和国家实验室的研究,为他们决定未来的教育和职业道路提供宝贵的经验。与此同时,该合作将开发一种广泛的社区参与模式,利用现代技术为服务不足的社区开辟获取尖端科学和科学教育的途径。技术总结:虽然金属玻璃具有成为变革性材料的潜力,但提高识别和开发新玻璃的能力以满足不断变化的需求至关重要。 研究表明,高温液体的性质是玻璃形成的指标。 特别重要的是在接近液相线温度的温度TA下金属合金液体的剪切粘度性质中的结构诱导交叉。 有证据表明,在TA处开始的过程最终导致在较低温度下的玻璃化转变。 的玻璃化转变温度的基础上的脆弱性的液体(确定从剪切粘度)和热膨胀系数在TA的预测是在良好的协议与实验数据的玻璃研究。 这项研究的重点是获得更深入的了解交叉在TA和发展一个更好的预测玻璃形成的基础上的基本性质的液体和晶体相的形式从它的实验研究将集中在准弹性和非弹性中子和高能X射线散射研究无容器-被处理的液体以及作为温度的函数的粘度和密度的测量。分子动力学研究将用于指导这些研究和解释所获得的数据。本提案中提出的新见解将引起那些对金属合金开发感兴趣的人以及更广泛的玻璃社区的兴趣,包括那些致力于硅酸盐和硫属化物玻璃的人。这些活动反映了加速材料开发的广泛方法,这是国家的优先事项。文科学院和R1大学之间的研究合作将在学术界和国家实验室的本科生和研究生的培训中发挥重要作用,在那里他们将学习最先进的X-该奖项反映了NSF的法定使命,并通过使用基金会的智力价值和更广泛的评估被认为值得支持。影响审查标准。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Deviations from Arrhenius dynamics in high temperature liquids, a possible collapse, and a viscosity bound
高温液体中阿累尼乌斯动力学的偏差、可能的塌陷和粘度限制
- DOI:10.1103/physrevresearch.4.043047
- 发表时间:2022
- 期刊:
- 影响因子:4.2
- 作者:Xue, Jing;Nogueira, Flavio S.;Kelton, K. F.;Nussinov, Zohar
- 通讯作者:Nussinov, Zohar
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Kenneth Kelton其他文献
Kenneth Kelton的其他文献
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{{ truncateString('Kenneth Kelton', 18)}}的其他基金
GOALI: Fundamental Investigations of Nucleation Processes in Silicate Liquids and Glasses with a Goal of Developing Predictive Models for Glass Formation and Crystallization
GOALI:硅酸盐液体和玻璃中成核过程的基础研究,目标是开发玻璃形成和结晶的预测模型
- 批准号:
1720296 - 财政年份:2017
- 资助金额:
$ 28.09万 - 项目类别:
Continuing Grant
Support for the 11th International Conference on Bulk Metallic Glasses
支持第十一届国际散装金属玻璃会议
- 批准号:
1609249 - 财政年份:2016
- 资助金额:
$ 28.09万 - 项目类别:
Standard Grant
Elastic and inelastic scattering studies of supercooled metallic glass-forming liquids - the connection between ordering and fragility
过冷金属玻璃形成液体的弹性和非弹性散射研究——有序性和脆性之间的联系
- 批准号:
1506553 - 财政年份:2015
- 资助金额:
$ 28.09万 - 项目类别:
Continuing Grant
Ordering and Phase Transitions in Supercooled Metallic Liquids and Glasses
过冷金属液体和玻璃中的有序和相变
- 批准号:
1206707 - 财政年份:2012
- 资助金额:
$ 28.09万 - 项目类别:
Standard Grant
MRI-R2: Development of Electrostatic Levitation Facility for Neutron Scattering Studies of Liquids to be used in Fundamental Research and Education
MRI-R2:开发用于液体中子散射研究的静电悬浮装置,用于基础研究和教育
- 批准号:
0959465 - 财政年份:2010
- 资助金额:
$ 28.09万 - 项目类别:
Standard Grant
Relations between Structure, Phase Formation and Phase Transitions in Supercooled Metallic Liquids and Glasses
过冷金属液体和玻璃中的结构、相形成和相变之间的关系
- 批准号:
0856199 - 财政年份:2009
- 资助金额:
$ 28.09万 - 项目类别:
Continuing Grant
Coupled Nucleation, Nanostructure Formation and Hydrogen Storage in Metallic Glasses and Quasicrystals
金属玻璃和准晶体中的耦合成核、纳米结构形成和储氢
- 批准号:
0606065 - 财政年份:2006
- 资助金额:
$ 28.09万 - 项目类别:
Continuing Grant
Structural and Microstructural Studies of Ti/Zr- and Al-Based Quasicrystals, Approximants and Metallic Glasses
Ti/Zr 和 Al 基准晶体、近似材料和金属玻璃的结构和微观结构研究
- 批准号:
0307410 - 财政年份:2003
- 资助金额:
$ 28.09万 - 项目类别:
Standard Grant
Structural and Microstructural Studies of Ti/Zr- and Al-Based Quasicrystal, Approximants and Metallic Glasses
Ti/Zr 和 Al 基准晶、近似晶和金属玻璃的结构和微观结构研究
- 批准号:
0072787 - 财政年份:2000
- 资助金额:
$ 28.09万 - 项目类别:
Standard Grant
Investigation of Formation, Stability, Structure and Hydrogen Storage Properties of Ti-Quasicrystals and Related Crystalline Phases
钛准晶及相关晶相的形成、稳定性、结构和储氢性能研究
- 批准号:
9705202 - 财政年份:1997
- 资助金额:
$ 28.09万 - 项目类别:
Continuing Grant
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Research on Quantum Field Theory without a Lagrangian Description
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