论文标题
严重塑性变形期间，在CNT/金属基质复合材料中的增强均匀化上
On the reinforcement homogenization in CNT/metal matrix composites during severe plastic deformation
论文作者
论文摘要
通过高压扭转（HPT）处理具有不同浓度的碳纳米管（CNT）增强镍基质复合材料。我们在不同变形的不同阶段彻底表征了CNT团聚体的空间排列，以提取用于优化加工参数有价值的信息，并阐明HPT通过HPT处理粒子增强金属矩阵复合材料期间所涉及的机制。从随着等效菌株的增加，从径向上拍摄的电子显微照片，我们观察到cnt crogners通过在HPT期间的CNT之间的相对滑动来脱离，在变形的较高阶段成为球形。此外，我们引入了一个模型，以预测HPT期间第二阶段均匀分布所需的最小应变，这可以与材料的三维结构相关，并且与实验数据非常吻合。
Carbon nanotube (CNT)-reinforced nickel matrix composites with different concentrations were processed by high pressure torsion (HPT). We thoroughly characterized the CNT agglomerates' spatial arrangement at different stages of deformation in order to extract information valuable for the optimization of the processing parameters and to elucidate the mechanisms involved during the processing of particle reinforced metal matrix composites by HPT. From the electron micrographs taken on the radial direction with increasing equivalent strains, we observed that CNT agglomerates debond by relative sliding between CNT during HPT, becoming spherical at higher stages of deformation. Furthermore, we introduced a model for the prediction of the minimum strain required for a homogeneous distribution of a second phase during HPT, which can be correlated to the material's three-dimensional structure and agrees well with the experimental data.
