Abstract A strategy utilizing carbon nanotubes (CNTs) was put forward to synthesize in situ TiC/Mo-based composites via laser powder bed fusion (laser PBF). The functionalized CNTs were dispersed with MoTiAl powders under electrostatic attraction by heteroagglomeration. During laser PBF, individual CNTs reacted with Ti elements and were completely transformed into monocrystalline TiC. Those TiC reinforcements were homogeneously dispersed and intimately contacted the matrix, giving rise to the morphological evolution of a MoTiAl matrix from the nearly columnar to fine equiaxed grains as well as improved mechanical performance. Our finding offers significant guidance for designing and producing advanced Mo-based composites in the application of heat-resistant materials.

中文翻译：

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通过激光粉末床熔融原位合成 TiC/Mo 基复合材料

摘要 提出了一种利用碳纳米管（CNTs）通过激光粉末床融合（laser PBF）原位合成TiC/Mo基复合材料的策略。功能化的碳纳米管在静电吸引下通过异质团聚与 MoTiAl 粉末一起分散。在激光 PBF 期间，单个 CNT 与 Ti 元素反应并完全转化为单晶 TiC。这些 TiC 增强剂均匀分散并与基体紧密接触，导致 MoTiAl 基体从近柱状到细等轴晶粒的形态演变以及改善的机械性能。我们的发现为设计和生产用于耐热材料的先进钼基复合材料提供了重要指导。