Li Denghui, Sun Changfei, Zhai Zhenjie, Wang Zhe, Chen Cong, Lei Qian
School of Chemistry and Materials Science, Qinghai Minzu University, Xining 810007, China.
Qinghai Key Laboratory of Nanomaterials and Technology, Xining 810007, China.
Nanomaterials (Basel). 2025 Jan 9;15(2):96. doi: 10.3390/nano15020096.
Copper matrix composites (CMCs) synergistically reinforced with rare earth oxides (ReO) and TiC were prepared using a powder metallurgy process with vacuum hot-pressing and sintering technology, aiming to explore new ways to optimize the properties of composites. Through this innovative approach, we propose a new solution strategy and idea for the difficult problem of mutual constraints between electrical and mechanical properties faced by traditional dual-phase reinforced Cu-matrix composites. Meanwhile, the modulation mechanism of ReO in CMCs and the electrical and mechanical properties of the composites were investigated. The compressive yield strength was improved from pure Cu (50 MPa) to TiC/Cu (159 MPa). The yield strength of EuO-TiC/Cu obtained after biphasic strengthening is 213 MPa, which is 326% higher than that of pure Cu, and the ultimate compressive strength reaches 790 MPa. The conductivity was enhanced from TiC/Cu (81.4% IACS) to LaO-TiC/Cu (87.3% IACS).
采用真空热压烧结技术的粉末冶金工艺制备了稀土氧化物（ReO）和TiC协同增强的铜基复合材料（CMC），旨在探索优化复合材料性能的新途径。通过这种创新方法，我们针对传统双相增强铜基复合材料面临的电学和力学性能相互制约这一难题，提出了一种新的解决策略和思路。同时，研究了ReO在CMC中的调制机制以及复合材料的电学和力学性能。抗压屈服强度从纯铜（50MPa）提高到TiC/Cu（159MPa）。双相强化后得到的EuO-TiC/Cu的屈服强度为213MPa，比纯铜高326%，极限抗压强度达到790MPa。电导率从TiC/Cu（81.4%IACS）提高到LaO-TiC/Cu（87.3%IACS）。
