Mechanically Alloyed Iron-Based Bulk Metallic Glasses and their Characterization

机械合金化铁基大块金属玻璃及其表征

• 批准号: 0314212
• 负责人: Challapalli Suryanarayana
• 金额: $ 29.31万
• 依托单位: The University of Central Florida Board of Trustees
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0314212&HistoricalAwards=false
• 关键词: Mechanically; Alloyed; Iron; Based; Bulk

The grant explores synthesis and detailed structural mechanical characterization of iron-based bulk metallic glasses. A major objective is to synthesize bulk metallic glasses using powder metallurgy technique of mechanical alloying followed by consolidation using pressing at elevated temperatures. The aim is to produce composites with fine dispersion of nanometer-sized particles of intermetallics in the amorphous matrix by judicious selection of processing parameters. The structural characterization involves x-ray diffraction, transmission electron microscopy and differential scanning calorimetry. The mechanical properties will be investigated using instrumented indentation to establish the correlation between structure and properties of the new types of alloys. Synthesis of bulk metallic glasses and their nanocrystalline composites by mechanical alloying will enable production of glassy materials in the systems that could not be produced or produced insufficient section thickness by other and more traditional techniques starting from the liquid state. Instrumented indentation over nano- and microscales offers itself as an effective and versatile tool for qualitative and quantitative mechanical characterization. The mechanical characterization from the continuously decreasing size of engineering structures will have application in nanoscience and nanotechnology. The broader educational impacts include integration of research into teaching through the development and introduction of new courses such as 'Experimental Techniques in Mechanics and Materials,' and 'Non-equilibrium Processing of Materials.' The outreach is planned to high schools and diverse communities through the Florida Engineering Education Delivery System (FEEDS).

该补助金探索铁基大块金属玻璃的合成和详细的结构力学表征。一个主要的目标是合成块体金属玻璃使用粉末冶金技术的机械合金化，然后在高温下使用压制固结。其目的是通过合理选择工艺参数，在非晶基体中制备出具有纳米尺寸金属间化合物颗粒的精细分散的复合材料。结构表征包括X射线衍射、透射电子显微镜和差示扫描量热法。将使用仪器化压痕来研究机械性能，以建立新型合金的结构和性能之间的相关性。通过机械合金化合成块体金属玻璃及其纳米晶复合材料将使得能够在系统中生产玻璃状材料，所述系统不能通过从液态开始的其它和更传统的技术生产或生产不足的截面厚度。纳米和微米尺度上的仪器化压痕为定性和定量的机械表征提供了一种有效和通用的工具。工程结构尺寸不断减小的力学特性将在纳米科学和纳米技术中得到应用。更广泛的教育影响包括通过开发和引入新课程，如“力学和材料实验技术”和“材料的非平衡加工”，将研究融入教学。“计划通过佛罗里达工程教育交付系统（FEEDS）向高中和不同社区进行推广。