熔铸反应合成 TiCNiAl复合材料研究
毕业论文关键词 镍铝基复合材料 熔铸反应 热力学 动力学 热爆反应
Title Casting Reactive Synthesis TiC/NiAl Composites
Abstract NiAl intermetallic compound is a promising high-temperature structural materials,has many excellent performance.TiC/NiAl composite wear resistant, hightemperature oxidation resistance and other properties can be improved NiAlintermetallic compounds brittle at room temperature and relatively low temperaturestrength.In this paper, casting method synthesized C-Ti-Ni-Al system NiAl matrixcomposites ，Compared test method using the thermal explosion.The use of DSC,XRD, SEM modern testing reaction and the reaction products were observed andanalyzed.The reaction is determined by thermodynamic calculation can be carriedout. With increasing heating rate, reaction appears to move to the high temperaturezone; with the enhancement of volume fraction increases, the peak temperature ofthe exothermic peak of the start of the reaction was gradually increased, the peakintensity of the reaction has also increased; the longer the milling time, thereaction temperature is relatively lower, the exothermic peak forward. Samplesobtained from the main phase NiAl and TiC phase composition according to thediffraction peaks. TiC / NiAl composite, TiC particles were triangular prism shapeafter the volume fraction of TiC particles increased nearly spherical, uniformlydistributed in the matrix.
Keywords nickel-aluminum matrix composites casting reaction Thermodynamicsdynamics thermal explosion
目 次
1 绪论1
1.1 引言1
1.2 Ni-Al 金属间化合物的研究1
1.3 TiC/NiAl 复合材料介绍 5
1.4 热分析技术6
1.5 本课题研究内容7
2 实验方法和复合材料制备8
2.1 实验材料8
2.2 实验设备 8
2.3 实验工艺流程 9
2. 4 样品的制备 10
2. 5 样品的表征 11
3 实验结果与讨论 1 4
3.1 Ni-Al-Ti-C体系反应机理14
3.2 DSC分析 15
3.3 SEM形貌分析 19
3.4 XRD 物相分析 22
结论 24
致谢 25
参考文献26
1 绪论1.1 引言随着全世界科学技术的迅猛发展，材料显得尤为重要，特别是现代先进科技的迅速发展，使得人们对材料性能上的需求变得更加多种多样。材料单一的功能、特点已经无法满足现代科技上的对材料的应用。因此，需要各种材料更多的良好的综合性能。另外，恶劣的工作环境(高温、腐蚀、磨损等)使得对材料的应用提出了越来越苛刻的要求[1-2]。金属间化合物是最近三十多年来国际上材料研究的热门，并且以金属间化合物为基体的复合材料属于一种拥有全新性能的材料而备受关注。而金属基复合材料（Metal MatrixComposites），通过以金属或其合金基体，与增强体复合而形成。其中增强体一般是由纤维、金属间化合物、晶须、陶瓷颗粒或其互相组合而成。MMCs 具有有高强度，出色的耐磨性能和更低的热膨胀系数(CTE)，尤其是陶瓷增强相的非常高的硬度、高刚度、优良的热稳定性和较高的化学稳定性、良好的耐蚀性等特性，使得其在工业生产中具有良好的综合性能[3-7]。