【作者】 郭丽君；

【导师】 祖方遒；

【作者基本信息】 合肥工业大学 ， 材料加工工程， 2002， 硕士

【摘要】 近些年来，探索合金的液态结构及其变化规律已引起人们的广泛兴趣，并已成为凝聚态物理和材料科学研究的共同关注的热点之一。本论文将选择三种合金系作为主要研究对象来研究合金的液态结构及其变化规律，这三种合金系分别为：GaBi、PbSn和InSn合金。 本文共分六章。第一章为绪论，它简述了金属和合金的液态结构及其性质研究的重要性、研究的现状和本文的主要研究内容。 第二章则介绍了课题工作中所使用的三种实验技术：内耗技术、热分析技术和X射线衍射技术。 在第三章中，我们介绍了GaBi合金系的液态结构和性质，并对内耗技术对于研究合金的液态结构及其性质的适用性进行验证。 第四章运用内耗技术和差热扫描热分析对PbSn合金系的液态结构及其变化。研究中发现在连续升温过程中合金液发生了结构转变，其转变程度与升温速率、热历史和合金组成等因素有关。 在第五章中，我们采用内耗技术和X射线衍射技术研究了InSn合金的液态结构。结果表明：合金熔体在连续升温过程中发生了结构的不连续性转变。 第六章是关于本论文工作的一个总结。更多还原

【Abstract】 Exploration of the structure and its change rules in liquid alloys has attracted considerable interest in recent years, and has become one of the most active areas in condensed matter physics and materials research. In this thesis, three kinds of alloy systems, GaBi, PbSn and InSn, are selected as examples to study liquid structure and its change rules in liquid alloys.The thesis consists of six chapters. Chapter one is an introduction, which briefly presents the significance and development of investigating the liquid structure and properties in metals and alloys. In the end of this chapter, the main research contents are introduced.Chapter two concerns three experiment technique, internal friction technique, thermal analysis technique and X-ray diffraction technique.In chapter three, we introduce the liquid structure and properties of GaBi alloys. Additionally, the applicability to investigating liquid structure and properties for alloys is precisely verified by means of internal friction method.Chapter four mainly gives the results of liquid structure and structure change in PbSn alloys with the combination of the internal friction technique and differential thermal analysis. The structure change is presumed in liquid PbSn alloys, and depends on the heating rate, thermal history and components and so on.In chapter five, We investigate the liquid structure of InSn alloys by means of internal friction and X-ray diffraction methods. The discontinuous structure transition occurs during continuous heating in InSn alloy.Chapter six presents a summary of this thesis.更多还原