快凝合金过热液体脆性与固体弹性和热稳定性的相关性研究

项目名称： 快凝合金过热液体脆性与固体弹性和热稳定性的相关性研究

项目编号： No.51301098

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 郭晶

作者单位： 山东农业大学

项目金额： 26万元

中文摘要： 本项目以快凝合金为研究对象，从过热液体的动力学特征、微结构、固体的弹性行为和热稳定性等问题入手，分别研究玻璃形成合金和非玻璃形成合金过热液体在液相线附近的弛豫动力学行为；从微观角度出发，揭示过热液体脆性特征，探索过热液体脆性行为的内在本质，建立过热液体脆性与金属玻璃形成和非金属玻璃形成之间的联系；通过研究快凝固体的弹性行为与热稳定性，建立过热液体脆性与快凝固体弹性参数和热稳定参数之间的相关性，并建立基于过热液体脆性预测快凝固体弹性行为和热稳定性的动力学模型。研究结果将有助于从本质上认识液体的动力学特征及其在液-固转变过程中的遗传行为，加深对玻璃转变本质的理解，同时将液体脆性的研究与应用扩展到整个金属和合金领域；在应用方面，可用于指导快凝生产过程中材料的设计、制备和性能预测。

中文关键词： 过热液体脆性；快凝合金；金属玻璃；热稳定性；热历史

英文摘要： In the present project, the rapidly solidified alloys are mainly chosen as the research object for the study of the dynamic characteristic of superheated liquids, the elastic properties and the thermal stability of the rapidly solidified solids.The dynamic properties around the liquidus of metallic glass formers and non-metallic glass formers will be investigated. The fragility characteristics of superheated liquids are revealed from the microscopic angle and the internal essence are explored. The correlations of the fragility of superheated liquids with glass formation and non-glass formation will be built. The relationships between fragility of superheated liquids and the parameters of elasticity and thermal stability will be established by investigating the elastic properties and thermal stability of rapidly solidified solids. Based on the relationships, the dynamic models are proposed to predict the elastic properties and thermal stability of rapidly solidified solids. The results will be helpful to understand the dynamic characteristics of liquids in essence and the hereditary behaviors of the dynamic characteristics during the liquid-solid transition. They can deepen understanding of the essence of glass transition and extend the investigation and application of fragility of superheated liquids from the gl

英文关键词： fragility of superheated liuquid；rapidly solidified alloy；metallic glass；thermal stability；thermal history