ABSTRACT In situ TiB2 and TiC reinforced copper matrix composites with tailored heterogeneous structure were fabricated via high-energy ball milling of Cu, TiH2 and B4C powders followed by hot pressing. The microstructures of both ball-milled powders and hot-pressed composites were compared. Although the dislocation density of Cu matrix was changed after hot pressing, the mode of distribution of ceramic phases in the Cu matrix was noted to transmit from the ball-milled powders to hot-pressed composites in case of the TiH2 particles synthesised by the in situ reactions. The structural inheritance between the ball-milled powders and hot-pressed composites could be used to control microstructural features and thus to tune properties. The hot-pressed TiB2–TiC/Cu composites with tailored heterogeneous structure exhibited better performance than those of homogeneous counterparts.

中文翻译：

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结构异质性及其对热压原位 TiB2-TiC/Cu 复合材料性能的影响

摘要 通过 Cu、TiH2 和 B4C 粉末的高能球磨和热压制备了具有定制异质结构的原位 TiB2 和 TiC 增强的铜基复合材料。比较了球磨粉末和热压复合材料的微观结构。尽管热压后Cu基体的位错密度发生了变化，但注意到Cu基体中陶瓷相的分布模式从球磨粉末转移到热压复合材料中，在原位合成TiH2颗粒的情况下反应。球磨粉末和热压复合材料之间的结构继承可用于控制微观结构特征，从而调整性能。