Y_2O_3掺杂对原位合成TiB/TiAl复合材料显微组织与性能的影响

Effect of Y_2O_3 Doped on Micro-Structures and Properties of In-Situ TiB/TiAl Composites

借助于XRD,SEM分析及力学性能测试,分析了Y2O3掺杂对原位合成TiB/TiAl复合材料显微组织与力学性能的影响。研究表明:Ti-Al-B-Y2O3体系反应产物的相组成基体为Ti3Al和TiAl相,增强相为TiB,并有微量的Al2O3,YAl3(BO3)4相生成。Y2O3的引入,改变了基体TiAl相和Ti3Al相相对含量,生成的YAl3(BO3)4为陶瓷相,其微细、均匀地扩散到基体内部,可细化晶粒。力学性能测试表明,Y2O3的引入能有效改善复合材料的力学性能。

TiB/TiAl composites doped Y2O3 was fabricated.The effect of rare-earth doping on the microstructures and properties was analyzed by XRD,SEM and universal properties tests.The refinement mechanism of rare-earth oxide was investigated as well.The results showed the phases of the composites were composed of the matrix of Ti3Al and TiAl phase,the reinforcement of TiB phase,a small amount of Al2O3 and YAl3(BO3)4 phase.The YAl3(BO3)4 for ceramics was diffused into matrix minimally、homogeneously,which can refine g...