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Understanding and Leveraging the Effect of Nanoscale Roughness on Macroscale Adhesion

了解和利用纳米级粗糙度对宏观粘附力的影响

基本信息

批准号：
1727378
负责人：
Tevis Jacobs
金额：
$ 30.51万
依托单位：
University of Pittsburgh
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2021-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1727378&HistoricalAwards=false
关键词：
Understanding Leveraging Effect Nanoscale Roughness

项目摘要

Many of the modern technologies produce miniaturized devices used in applications from electronics, communications, medicine as well as others. The small size of these devices leads to unique issues in their manufacture and use. However, many of these emerging devices and manufacturing techniques face a problem with stickiness or adhesion. Specifically, when small-size parts come into contact, they spontaneously stick together and cannot easily be pulled apart. This problem significantly limits the performance and reliability of otherwise promising technologies. This grant supports fundamental research to understand the dependence of adhesion on surface roughness. This project will develop new ways to measure roughness at small sizes, and also new ways to control it. Ultimately, the insights gained from this investigation will enable the intentional modification of roughness during manufacturing to improve the performance of the final devices. The investigation is being conducted by an international team of researchers, and incorporates specific programs for education both for engineers in industry to put the research into practice, and also for grade-school students to increase interest and participation among the next generation of American engineers. The goals of this award are: (1) to identify the length scales of surface roughness that most strongly impact adhesion; and (2) to develop fabrication strategies to rationally modify topography at these scales to control adhesion. First, the investigation will use transmission electron microscopy to characterize previously unmeasured scales of topography on technologically-relevant materials, and then use a custom micromechanical tester to measure their surface adhesion. Experimental results will be analyzed in the context of existing analytical and numerical models, in order to evaluate and then improve these models. The experiments will be complemented by large-scale computer simulations of identical surfaces, in order to gain atomic-scale information about the material response. The simulations will be carried out through a strong non-NSF-funded collaboration with the Karlsruhe Institute of Technology in Germany. Second, using advanced lithographic techniques, the small-scale roughness of test surfaces will be systematically varied and quantitatively linked to changes in properties. This will enable both experimental tests of rough-surface models, as well as the demonstration of routes to modify surface roughness to achieve an optimal surface adhesion. This investigation will have direct impact on microscale devices and on advanced manufacturing, both of which require precise understanding and control of surface properties. Further, the experimental validation of roughness models will have application to rough surfaces more broadly from automotive components to road surfaces to medical implants.

许多现代技术生产用于电子，通信，医学等应用的小型化设备。这些设备的小尺寸导致其制造和使用中的独特问题。然而，这些新兴器件和制造技术中的许多面临粘性或粘附性的问题。具体而言，当小尺寸部件接触时，它们会自发地粘在一起，并且不容易被拉开。这个问题大大限制了性能和可靠性，否则有前途的技术。该补助金支持基础研究，以了解表面粗糙度对粘附力的依赖性。该项目将开发新的方法来测量小尺寸的粗糙度，也有新的方法来控制它。最终，从这次调查中获得的见解将使在制造过程中的粗糙度的故意修改，以提高最终设备的性能。这项调查由一个国际研究小组进行，并结合了具体的教育计划，既为工业工程师将研究付诸实践，也为小学生增加下一代美国工程师的兴趣和参与。该奖项的目标是：（1）确定最强烈影响粘附力的表面粗糙度的长度尺度;（2）制定制造策略，以合理地修改这些尺度的形貌，以控制粘附力。首先，调查将使用透射电子显微镜来表征技术相关材料上先前未测量的形貌尺度，然后使用定制的微机械测试仪来测量其表面粘附力。实验结果将在现有的分析和数值模型的背景下进行分析，以评估，然后改进这些模型。这些实验将通过对相同表面的大规模计算机模拟来补充，以获得有关材料反应的原子尺度信息。模拟将通过与德国卡尔斯鲁厄理工学院的强有力的非NSF资助合作进行。其次，使用先进的光刻技术，测试表面的小尺度粗糙度将系统地变化，并定量地与性能变化相关联。这将使粗糙表面模型的实验测试，以及修改表面粗糙度以实现最佳表面附着力的路线的演示成为可能。这项研究将对微尺度器件和先进制造产生直接影响，这两者都需要精确理解和控制表面特性。此外，粗糙度模型的实验验证将更广泛地应用于粗糙表面，从汽车部件到路面到医疗植入物。

项目成果

期刊论文数量（9）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Hard-material Adhesion: Which Scales of Roughness Matter?

DOI：
10.1007/s11340-021-00733-6
发表时间：
2021-07
期刊：
Experimental Mechanics
影响因子：
2.4
作者：
L. A. Thimons;A. Gujrati;A. Sanner;Lars Pastewka;T. Jacobs
通讯作者：
L. A. Thimons;A. Gujrati;A. Sanner;Lars Pastewka;T. Jacobs

Linking energy loss in soft adhesion to surface roughness

DOI：
10.1073/pnas.1913126116
发表时间：
2019-12-17
期刊：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
影响因子：
11.1
作者：
Dalvi, Siddhesh;Gujrati, Abhijeet;Jacobs, Tevis D. B.
通讯作者：
Jacobs, Tevis D. B.

Characterizing surface finish and fatigue behavior in binder-jet 3D-printed nickel-based superalloy 625

DOI：
10.1016/j.addma.2018.09.012
发表时间：
2018-12-01
期刊：
ADDITIVE MANUFACTURING
影响因子：
11
作者：
Mostafaei, Amir;Neelapu, S. Harsha Vardhan R.;Chmielus, Markus
通讯作者：
Chmielus, Markus

Combining TEM, AFM, and Profilometry for Quantitative Topography Characterization Across All Scales

DOI：
10.1021/acsami.8b09899
发表时间：
2018-08-29
期刊：
ACS APPLIED MATERIALS & INTERFACES
影响因子：
9.5
作者：
Gujrati, Abhijeet;Khanal, Subarna R.;Jacobs, Tevis D. B.
通讯作者：
Jacobs, Tevis D. B.

Scale-dependent roughness parameters for topography analysis

用于形貌分析的尺度相关粗糙度参数

DOI：
10.1016/j.apsadv.2021.100190
发表时间：
2021
期刊：
Applied surface science advances
影响因子：
6.2
作者：
Sanner, Antoine;Nohring, Wolfram G.;Thimons, Luke A.;Jacobs, Tevis D.;Pastewka, Lars
通讯作者：
Pastewka, Lars