Reinforced copper matrix composites with highly dispersed nano size TiC in-situ generated from the Carbon Polymer Dots

作者：Xiao Huang, Longke Bao, Rui Bao, Liang Liu, Jingmei Tao, Jinsong Wang, Zhengfu Zhang, Zhenhua Ge, Songlin Tan, Jianhong Yi, Fanran Meng · 发表于：Advanced Powder Materials · 年份：2022 · DOI：10.1016/j.apmate.2022.100090 · 被引用次数：28 · 研究领域：Aluminum Alloys Composites Properties、Advanced ceramic materials synthesis、Advanced materials and composites

In order to uniformly disperse the ceramic reinforcements synthesized in-situ in the copper matrix composites, this study used Carbon Polymer Dot (CPD) as the carbon source and Cu–1.0%Ti alloy powder as the matrix for supplying Ti source to prepare in-situ synthesized TiC/Cu composites. The results show that TiC nano-precipitates, having the similar particle sizes with the CPD, form at the grains interior and grain boundaries, and maintain a uniform distribution state. Compared with the matrix, 0.3 wt% CPD/Cu composite displays the best strength-plastic compatibility, the ultimate tensile strength achieves 385 MPa accompanied with a corresponding elongation of 21%, owing to the dislocation hindrance caused by nano-carbide and excellent interface bonding between nano TiC and the Cu matrix. The density function theory calculation supports our experimental results by showing a tighter and stronger interface contact. This work presents a new approach for studying in-situ carbide precipitates.