Abstract An innovative approach of fabricating fine TiC particles through the dissolution of solid carbon in the CuxTi melt and subsequently separation with super-gravity is proposed in this study. The reactant mixtures of titanium sponge, copper and carbon particles reacted at 1573 K for 4 h and then the near-spheroidal TiC grains gradually precipitated out of the Cu–Ti–C system. The influences of copper content, separating temperature, gravity coefficient and separating time on the separation of precipitated TiC from the Cu–Ti–C melt have been studied. The particle size distribution and stoichiometric of TiC were calculated, and the detailed mechanism of fabricating TiC was discussed. The experimental results showed that the mass fraction of copper mixed with TiC in the residue was 6.5 wt% and the yield of the copper-rich phase exceeded 89 wt% under super-gravity treatment with the conditions of χCu = 90 wt%, T = 1523 K, t = 120 s and G = 600. After leaching with the sulfuric acid solution, the purity of TiC particulates was 99 wt% and the removal rate of the copper impurity could be up to 97.8%. Finally, the product of the homogeneous and fine TiC particles with good dispersibility was obtained. The circle equivalent diameter and the median diameter of the TiC particulates were found to be 2.09 μm and 2.12 μm, respectively. The elongation and the aspect ratio of the TiC particulates were 83.4% and 74.4%, respectively. Moreover, the lattice parameter of the purified TiC particulates was calculated by the Nelson-Riley extrapolation function which was near to the standard value, and the stoichiometry of TiC particulates obtained in this work was close to 1.

中文翻译：

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超重力场下Cu-Ti-C体系制备TiC

摘要 本研究提出了一种通过将固体碳溶解在 CuxTi 熔体中并随后用超重力分离来制造精细 TiC 颗粒的创新方法。海绵钛、铜和碳颗粒的反应混合物在 1573 K 下反应 4 小时，然后近球形的 TiC 晶粒逐渐从 Cu-Ti-C 体系中沉淀出来。研究了铜含量、分离温度、重力系数和分离时间对从 Cu-Ti-C 熔体中分离析出 TiC 的影响。计算了TiC的粒径分布和化学计量比，并讨论了制备TiC的详细机理。实验结果表明，残留物中与TiC混合的铜的质量分数为6。在 χCu = 90 wt%、T = 1523 K、t = 120 s 和 G = 600 的条件下，超重力处理下富铜相的产率超过 89 wt%。酸溶液，TiC颗粒纯度为99wt%，铜杂质去除率可达97.8%。最终得到分散性好的均匀细小的TiC颗粒产物。发现 TiC 颗粒的等效圆直径和中值直径分别为 2.09 μm 和 2.12 μm。TiC颗粒的伸长率和纵横比分别为83.4%和74.4%。此外，通过 Nelson-Riley 外推函数计算得到的纯化 TiC 颗粒的晶格参数接近标准值，