SGER: Grain Boundary Structure and Interfacial Wetting in Mineral Systems

SGER：矿物系统中的晶界结构和界面润湿

• 批准号: 9422941
• 负责人: Krishna Rajan
• 金额: $ 2万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9422941&HistoricalAwards=false
• 关键词: SGER; Grain; Boundary; Structure; Interfacial

9422941 Rajan The aim of this research is to elucidate the relationship between grain boundary crystallography and grain boundary wetting in mineral systems. The specific experimental focus is determination of the crystallography characteristics and orientation relationships of grains that have their mutual boundary wetted and comparison to these boundaries that are not wetted. The methodology to be utilized involves examination of grain orientation and grain boundary misorientation data (obtained by SEM and TEM) coupled with Rodrigues-Frank representations of the data. This approach will develop characterization techniques that capture localized information in a statistically meaningful manner. Wetting properties are of interest to Earth scientists because they affect grain boundary transport, a fundamental process by which bulk transport of chemical species through rocks containing static fluids occurs. In addition, melt films along grain boundaries affect seismic velocities and attenuation within the solid Earth and rheological properties of materials in seismic zones.

9422941 Rajan这项研究的目的是阐明矿物系统中晶界晶体学和晶界湿润之间的关系。 具体的实验重点是确定晶粒的晶体特征和方向关系，这些晶粒具有相互边界的湿润，并与未润湿的这些边界进行了比较。 要使用的方法涉及研究晶粒方向和晶界不良方向数据（通过SEM和TEM获得）以及数据的Rodrigues-Frank表示。 这种方法将开发出以统计意义的方式捕获本地信息的表征技术。 润湿特性对地球科学家感兴趣，因为它们会影响晶界的运输，这是一个基本过程，化学物种通过含有静态液体的岩石进行大量运输。 此外，沿晶界的熔融膜影响地震质量和地震区域材料的流变特性的地震速度和衰减。