摘要金属间化合物是一种介于金属和陶瓷之间的新型材料，它由两种金属按一定比例 组成。这种材料密度低强度高，金属材料的延展性，又具有陶瓷材料的硬度，高温抗 氧化性能，有着很好的应用前景。在本课题中研究的 Fe3Al 金属间化合物，相对于其 他诸如 Ti-Al,Fe-Ni 等金属间化合物，成本比这些含有战略元素的化合物要低，密度 低，所以它在金属间化合物中的地位举足轻重。而且它的耐磨性能好，抗硫化，高温 下抗氧化性能也都是较好的。但同时，这个材料也有它自己的不足，比如较高温度下 强度急剧下降和环境脆性，这两个因素极大的限制了其应用。简单来讲，粉末冶金法 是将组成我们所要成品的各类金属磨成粉，将这些金属粉末通过烧结等方法工艺制取 相应的金属材料的工业制取技术。83336

本文主要研究添加 Cr 元素之后 Fe3Al 合金的力学性能。首先称取一定比例的铁 粉、铝粉以及铜粉置于行星球磨机中，让他们充分混合。接下来采用真空烧结的方法 制备 Fe3Al 基合金。而后便是切割试样，对它们进行力学性能分析。根据实验结果可 知，添加 Cr 之后的 Fe3Al 力学性能和摩擦磨损性能要优于纯 Fe3Al 。 

毕业论文关键词：Fe3Al 金属间化合物；真空热压烧结；力学性能；摩擦学性能

Abstract Intermetallic compound is a range of new material between metal and ceramic, which consists of two metal composed by a certain percentage。 This material is low density high strength and ductility of the metal material and having a hardness of ceramic materials, high temperature oxidation resistance, has good prospects。 Intermetallic compound Fe3Al metal in this subject in the study, compared to others, such as inter-Ti-Al, Fe-Ni and other metal compounds than the cost of these compounds containing a strategic element to  be low, low density, so that its position in the intermetallic compound important。 And it's good wear resistance, anti-sulfide, oxidation resistance at elevated temperatures are also preferred。 But at the same time, this material also has its own shortcomings, such as a sharp decline in strength at higher temperatures and environmental fragility, these two factors greatly limits its application。 Simply put, the composition of the powder metallurgy method is finished we want all kinds of powdered metal, these metal powder sintering method by taking the appropriate process technology industrial metal materials preparation technology。

Fe3Al mechanical properties of the alloy after the addition of Cr element paper studies。 First Weigh a certain proportion of iron, aluminum and copper into a planetary ball mill, so that they fully mixed。 Followed by vacuum sintering method for preparing Fe3Al based alloys。 Then the sample is cut, them mechanical analysis。 According to the experimental results, Fe3Al mechanical properties and tribological properties of Cr after better than pure Fe3Al。

Keywords: Fe3Al intemetallics；Vacuum hot-pressing sintering technique；Mechanical properties；Tribological properties

目录

第一章 绪论 1

1。1  课题背景 1

1。2  国内外研究进展 2

1。2。1 Fe-Al 间金属化合物结构特点 3

1。2。2 室温力学性能 3

1。2。3 高温力学性能 4

1。2。4 高温抗氧化性能 4

1。2。5 抗硫化性能 5

1。2。6 摩擦学性能 6

1。3 制备 Fe3Al 的常用方法