Nanoparticle-reinforced Mg matrix composites (NPMMCs) capitalize on the synergistic properties of nanoparticles and Mg matrix, resulting in enhanced mechanical attributes compared to matrix. Nonetheless, effective high-temperature dispersion of nanoparticles remains challenging. This study employs a molten salt dispersant (NaCl-KCl-MgCl₂) effectively mitigating the oxidation and combustion of TiC nanoparticles (TiC_np). Compared with the atmosphere, the molten salt facilitates the pre-dispersion of TiC_np through thermal motion at elevated temperatures, thereby reducing agglomeration between the TiC_np. Simultaneously, the molten salt effectively wets and disrupts the oxide layer on the surface of Mg melt, facilitating the wetting of TiC_np by the Mg melt. The successful incorporation of 3 vol.% TiC_np into the Mg matrix is achieved by utilizing molten salt, and the addition of TiC_np increases the viscosity of mg melt. Further dispersed by ultrasonic dispersion, the unique distribution of TiC_np within ring-like structures was obtained which was attributed to the increase of viscosity. As a configurational distribution, the ring-like TiC_np distribution morphology significantly enhances the mechanical properties of composites, as evidenced by an approximate 50 % increase in compressive strength (UCS).

中文翻译：

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通过熔盐克服氧化并增强纳米颗粒的分散性：TiCnp 在纯 Mg 中的构型分布


纳米颗粒增强镁基复合材料 （NPMMC） 利用纳米颗粒和镁基体的协同特性，与基体相比，其机械属性得到增强。尽管如此，纳米颗粒的有效高温分散仍然具有挑战性。本研究采用熔盐分散剂 （NaCl-KCl-MgCl₂） 有效减轻 TiC 纳米颗粒 （TiC_np） 的氧化和燃烧。与大气相比，熔盐在高温下通过热运动促进了 TiC_np 的预分散，从而减少了 TiC_np 之间的团聚。同时，熔盐有效地润湿并破坏了 Mg 熔体表面的氧化层，促进了 Mg 熔体对 TiC_np 的润湿。利用熔盐将 3 vol.% TiC_np 成功掺入 Mg 基体中，而 TiC_np 的添加增加了 Mg 熔体的粘度。通过超声分散进一步分散，获得了 TiC_np 在环状结构内的独特分布，这归因于粘度的增加。作为构型分布，环状 TiC_np 分布形态显着增强了复合材料的机械性能，抗压强度 （UCS） 增加了约 50% 就证明了这一点。