摘要金属间化合物被认为一种有潜力的高温结构材料已展现出了优良的性能。Fe-Al金属间化合物具有密度低、成本低、强度高、抗磨损性能良好以及优异的抗氧化、抗硫化和抗碳化性能，是一种具有良好应用前景的抗磨材料和高温结构材料。然而由于室温脆性以及温度超过600度后强度和蠕变抗力急剧下降这两个致命弱点，从而阻碍了其被广泛的使用。87086

本实验运用球磨混合与真空热压烧结制备技术，制备得到了纯Fe3Al以及TiC质量分数为25wt。%、35wt。%、50wt。%的Fe3Al/TiC复合材料。制备得到的复合材料中Fe3Al与TiC相组成纯度都比较高，材料致密度也都非常高，TiC增强相在Fe3Al/TiC复合材料中分布均匀，增强相与基体之间具有良好的结合性。

TiC陶瓷颗粒的加入明显提高了Fe3Al的力学性能和摩擦性能。Fe3Al合金及其复合材料都有较高的硬度，还具有非常高的压缩强度，并且随着TiC陶瓷相含量的增加，硬度和压缩强度显著增大。由于TiC陶瓷相具有脆性，复合材料的弯曲强度随着TiC的增加而降低。复合材料的磨损率随TiC含量的增加而减小。

毕业论文关键字：Fe3Al金属间化合物；TiC增强体；真空热压烧结；力学性能；摩擦性能

Abstract Intermetallic was regarded as potential of high temperature structural materials which have shown excellent performance。 Fe-Al intermetallic compounds with low density, low cost, high strength, good abrasion resistance and excellent resistance to oxidation and sulfuration and carbonation resistance, which is a good prospect of wear-resistant materials and high temperature structural materials。 However due to the brittle at room temperature and the temperature more than 600 ℃ after the strength and creep resistance of a sharp decline in both Achilles, which prevented it from being widely used。

This experiment used the mill mixing and vacuum hot-pressing sintering technique to prepare pure Fe3Al TiC mass fraction 25WT。%, 35WT。%, 50WT。% Fe3Al/TiC of composite materials。 Fe3Al prepared composite materials are composed of relatively high purity with the TiC, material density is quite high, even distribution of TiC reinforced Fe3Al/TiC composites, has a good combination of reinforcing phase and matrix。

TiC ceramic particles join of Fe3Al is improved mechanical properties and tribological properties。 Fe3Al alloys and composite materials have high hardness, also has a very high compressive strength, with TiC ceramic content and the increased hardness and compressive strength increases significantly。 Because TiC ceramics are brittle, the flexural strength decreases with the increase of TiC。 The wear rate of the composite with TiC content increases。

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

目   录

第一章  绪论 1

1。1 前言 1

1。2 Fe3Al金属间化合物的研究现状 1

1。2。1 Fe3Al金属间化合物的国外研究 1

1。2。2 Fe3Al金属间化合物的国内研究 2

1。2。3 Fe3Al金属间化合物的研究问题 2

1。3 铁铝系陶瓷复合材料的研究内容 3

1。3。1 Fe3Al / Al2O3 复合材料 3

1。3。2 Fe3Al/ZrO2 复合材料 3

1。3。3 Fe3Al/TiC复合材料 4

1。4 铁铝系金属间化合物的制备方法 4