通过直观观察区分合金中细长第二相与晶界的实验设计  

An Experiment Designed for Students to Destingush between Needle——like Second Phase and Grain Boundary in Alloys

作　　者：杨林钰[1] 王淑英[1] 骆建敏[2] 陈恒雷[1] 

机构地区：[1]新疆大学物理科学与技术学院,新疆乌鲁木齐830000 [2]新疆大学理化分析测试中心,新疆乌鲁木齐830000

出　　处：《教育教学论坛》2018年第7期264-265,共2页Education And Teaching Forum

基　　金：国家自然科学基金项目(11364042);新疆大学21世纪高等教育教学改革工程"四期项目(XJU2015JGY61);新疆大学博士启动金(BS150125;BS160217)资助

摘　　要：材料科学基础是一门很重要的基础课,其中的实验课程不仅能锻炼学生的动手能力,而且能够很好地促进学生对基本概念的理解。但在实验课上课的过程中我们发现,学生在金相显微镜下观察实验样品时常常将含多个物相的样品中的细长第二相和晶界混淆。因此我们以铸态AL-4%Cu合金及经过时效处理的加晶粒细化剂的AL-4%Cu合金作为样品设计了实验,让学生对于相和晶界能有十分直观的观察和对比。此实验的设计一个方面能够加深学生对基础知识与概念的认识,另一方面能够让学生对金相显微分析更熟悉,为今后的研究工作做准备。The corresponding experimental course of foundations of material science can improve not only the students 'various abilities but also the quality of foundations teaching. It is common for students to muddle the needle-like second phase and grain boundary in the samples of alloys.In this paper,an experiment was designed to solve this problem.In the designed experiment,Al-4%Cu alloys were chosen as the samples to help students to distinguish the different between the needle-like second phase and grain boundary.From the practice of this experiment,the metallographic analysis ability of students can be strengthened,and they may have a further understanding of the basic concepts.

关 键 词：晶界 相界面 金相显微分析 

分 类 号：G642.423[文化科学—高等教育学]