Cu matrix composites reinforced by TiB₂/TiN ceramic reinforcements (Cu/TBN composites) were prepared by hot pressing method. Prior to the hot pressing, Cu/TiB₂/TiN composite powders (CTBN powders), which were used as the starting materials of Cu/TBN composites, were fabricated by self-propagating high-temperature synthesis method. The CTBN particles were found to be in a special core–shell structure with a Cu–Ti alloy core and a TiB₂/TiN ceramic shell. The test results presented obvious improvements in mechanical properties. The highest ultimate tensile strength reached up to 297 MPa, 77 MPa higher than that of Cu. And the highest hardness reached up to 70.7 HRF, 15.7 HRF higher than that of Cu. A comparative study indicated that the core–shell structured particles could bring about more obvious strengthening effect than the traditional irregularly shaped particles, which was due to the improved Cu/ceramics interfacial bonding, the linkage strengthening effect of both TiB₂ and TiN, and higher load bearing ability of the core–shell structured reinforcements.

采用热压法制备了由TiB ₂ / TiN陶瓷增强材料增强的Cu基复合材料（Cu / TBN复合材料）。在热压之前，通过自蔓延高温合成法制备用作Cu / TBN复合材料的起始原料的Cu / TiB ₂ / TiN复合粉末（CTBN粉末）。发现CTBN颗粒处于特殊的核壳结构中，具有Cu-Ti合金核和TiB ₂/ TiN陶瓷外壳。测试结果显示出机械性能的明显改善。最高极限抗拉强度达到297 MPa，比铜高77 MPa。最高硬度达到70.7 HRF，比Cu高15.7 HRF。一项比较研究表明，核壳结构的颗粒比传统的不规则形状的颗粒具有更明显的增强作用，这是由于改进的Cu /陶瓷界面键合，TiB ₂和TiN的键合增强作用以及更高的核壳结构增强材料的承载能力。