Acquisition of a Nanomechanical Testing Platform to Establish a User Center for Nanomecanical Characterization Materials

收购纳米力学测试平台，建立纳米力学表征材料用户中心

• 批准号: 0420859
• 负责人: Sanjeev Khanna
• 金额: $ 29.39万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-15 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0420859&HistoricalAwards=false
• 关键词: Acquisition; Nanomechanical; Testing; Platform; Establish

The Nanomechanical Testing Platform addresses the fundamental understanding of the properties of materials at the nanometer length scale. The system includes the Hysitron TriboIndenter as a stand-alone, nanomechanical test instrument that utilizes a fully integrated indenter head and atomic force microscope (AFM) combination. Other accessories integrated with the Triboindenter to support many different nanomechanical characterization techniques for a variety of applications include nanoDMA and modulus mapping module for investigating time dependent properties of materials using a dynamic testing technique; TriboAE module to monitor fracture, delamination and phase transformations that occur under nanoscale contacts using the acoustic waves emitted during the phenomena; Feedback Control Module will allow to operate in closed loop load or displacement control for testing during creep or stress relaxation; Thermal Control Heating/Cooling Stage and a Vacuum Chuck. Nano-mechanical testing in conjunction with nano-scale surface imaging is a powerful way to analyze extremely small volumes of materials or surfaces with a very high resolution. The University of Missouri Columbia has identified Nano-science and Nano-devices as a major research thrust area. Intellectual merit: With these instruments researchers will be able to perform quasi-static testing to study elastic, plastic, and fracture response of both hard and very soft materials during indentation at the nanometer length scale. They will be able to image and quantitatively study surface phenomena such as surface wear by rubbing and scratching. In addition researchers can study time dependent properties of materials over a range of temperatures. It is envisaged that the instrumentation will be used for a wide range of current and future research in areas such as property gradients across composite material interphases and interfaces in welded and joined materials, surface topography in MEMS devices, adhesion and frictional characteristics of electronic devices of micrometer length scale, surface characterization of biological sensors, interfacial properties across layered synthetic and biological materials, mechanical property variations within and across phases in ceramic-polymer composites and investigation of mechanical properties of self-assembled nanostructured materials. Broader Impact: A significant number of graduate and undergraduate students will be exposed to the usage and application of state-of-the-art instrumentation through classroom instruction and research. This experience should sharpen their understanding of materials behavior. This instrumentation will foster interdisciplinary research. The whole range of proposed instruments will form the proposed Nanomechanical Characterization User Center. It should be emphasized that the user facility will be open to faculty and students of all colleges and the medical school on MU campus. The MU campus has made vigorous efforts to recruit students from regional college programs, including those with predominantly Black and Hispanic enrollment. Our group has established collaborative program with Lincoln University (HBCU). The MU is also committed to the recruitment and retention of minority and female students in Science and Engineering.

纳米力学测试平台解决了在纳米长度尺度上对材料性能的基本理解。该系统包括Hysitron TriboIndenter作为一个独立的，纳米机械测试仪器，利用完全集成的压头和原子力显微镜（AFM）的组合。与Triboindenter集成的其他附件支持各种应用的许多不同的纳米机械表征技术，包括nanoDMA和模量映射模块，用于使用动态测试技术研究材料的时间依赖特性; TriboAE模块，用于使用现象期间发出的声波监测纳米级接触下发生的断裂，分层和相变;反馈控制模块将允许在蠕变或应力松弛期间在闭环负载或位移控制下运行，以进行测试;热控制加热/冷却阶段和真空卡盘。结合纳米尺度表面成像的纳米力学测试是以极高分辨率分析极小体积材料或表面的强大方法。 密苏里州哥伦比亚大学已确定纳米科学和纳米器件作为一个主要的研究推力领域。智力优点：有了这些仪器，研究人员将能够进行准静态测试，研究弹性，塑性和断裂响应的硬材料和非常软的材料在压痕在纳米长度尺度。他们将能够成像和定量研究表面现象，如摩擦和划痕引起的表面磨损。此外，研究人员可以研究材料在一定温度范围内的时间依赖性。据设想，该仪器将用于广泛的当前和未来的研究领域，如跨复合材料界面和焊接和连接材料界面的性能梯度，MEMS器件的表面形貌，微米长度尺度的电子器件的粘附和摩擦特性，生物传感器的表面表征，分层合成和生物材料的界面性能，陶瓷-聚合物复合材料中相内和相间的力学性能变化以及自组装纳米结构材料的力学性能研究。更广泛的影响：大量的研究生和本科生将通过课堂教学和研究接触到最先进的仪器的使用和应用。这一经验应该提高他们对材料行为的理解。这种仪器将促进跨学科研究。整个拟议的仪器范围将形成拟议的纳米机械表征用户中心。应该强调的是，用户设施将向所有学院和医学院的师生开放。MU校园积极努力从区域大学项目中招收学生，包括那些以黑人和西班牙裔为主的学生。本集团与林肯大学（HBCU）建立了合作项目。MU还致力于招聘和保留少数民族和女性学生在科学和工程。