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利用钛与B2O3、B4C和稀土钇之间的化学反应,采用真空非自耗电弧炉熔炼工艺,原位合成多元、多尺度、不同形状增强体增强的钛基复合材料———(TiB+TiC+Y2O3)/Ti。利用热力学机理分析了制备该种材料的可行性,通过X射线衍射仪、光学显微镜、扫描电镜、电子探针和透射电镜分析了复合材料的物相组成、增强体的微观形貌和材料的显微组织。结果表明:复合材料的增强体为TiB、TiC和Y2O3;生成的增强体分布均匀;复合材料的晶粒非常细小;TiB为针状;TiC为等轴状和近似等轴状;Y2O3的形貌随着稀土Y含量的增加从近似等轴状粗化生长为树枝状;材料中存在较多纳米级的球状增强体;增强体TiB、TiC、Y2O3和钛基体界面干净,没有界面反应物存在。
By using the chemical reaction between titanium and B2O3, B4C and rare earth yttrium, the vacuum non-consumable arc furnace smelting process was used to synthesize the Ti-based composite material with multiple, multi-scale and different shapes reinforcements in situ. TiC + Y2O3) / Ti. The feasibility of preparing the material was analyzed by thermodynamic mechanism. The phase composition of the composites was analyzed by X-ray diffraction, optical microscope, scanning electron microscopy, electron probe and transmission electron microscopy. The microstructure of the composites was enhanced, Micro-organization. The results show that the reinforcements of the composites are TiB, TiC and Y2O3; the reinforcements are uniformly distributed; the grains of the composites are very small; the TiB is acicular; the TiC is equiaxed and approximately equiaxed; the morphology of Y2O3 As the content of rare earth Y increases, it grows from approximately equiaxed into coarse dendrites. There are more nano-sized spherical reinforcements in the material. The interfaces of TiB, TiC, Y2O3 and Ti matrix are clean and no interface reactants exist.