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对纳米长度尺度材料特性的基本理解。该系统包括 Hysitron TriboIndenter 作为独立的纳米力学测试仪器，采用完全集成的压头和原子力显微镜 (AFM) 组合。与 Triboindenter 集成的其他附件可支持多种不同应用的纳米力学表征技术，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相关特性； TriboAE 模块利用现象期间发出的声波来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闭环负载或位移控制下运行，以在蠕变或应力松弛期间进行测试；热控制加热/冷却台和真空吸盘。纳米机械测试与纳米级表面成像相结合是一种以非常高的分辨率分析极小体积材料或表面的强大方法。 密苏里大学哥伦比亚分校已将纳米科学和纳米设备确定为主要研究重点领域。智力价值：利用这些仪器，研究人员将能够进行准静态测试，以研究硬质和极软材料在纳米长度尺度压痕过程中的弹性、塑性和断裂响应。他们将能够对表面现象进行成像和定量研究，例如摩擦和刮擦造成的表面磨损。此外，研究人员还可以研究材料在一定温度范围内随时间变化的特性。预计该仪器将广泛用于当前和未来的研究领域，例如焊接和连接材料中复合材料相间和界面的性能梯度、MEMS 器件的表面形貌、电子器件的粘附和摩擦特性。微米长度尺度、生物传感器的表面表征、层状合成和生物材料的界面特性、陶瓷聚合物复合材料相内和相间的机械特性变化以及自组装纳米结构材料的机械特性研究。更广泛的影响：大量研究生和本科生将通过课堂教学和研究接触到最先进仪器的使用和应用。这种经历应该会加深他们对材料行为的理解。该仪器将促进跨学科研究。提议的全系列仪器将构成提议的纳米机械表征用户中心。需要强调的是，用户设施将向密苏里大学校园内所有学院和医学院的教职员工和学生开放。密苏里大学校园大力招收地区大学项目的学生，包括那些以黑人和西班牙裔学生为主的项目。我们课题组与林肯大学（HBCU）建立了合作项目。密苏里大学还致力于招收和留住科学与工程专业的少数族裔和女学生。