Modulation Mechanism of Transition Elements Fe and Mn on the Interface Bonding Performance of Bronze/Diamond Composites

The modulation mechanism of iron (Fe) and manganese (Mn) in transition-metal elements on the interface bonding and mechanical properties of bronze (Cu₃Sn)-based/diamond composites is investigated through first-principles calculations. Transition-elements-doping scenarios are investigated employing six-layer slab models. It is revealed that the doping of Fe or Mn can make the Cu₃Sn/diamond interface more stable, which effectively improves the wettability of the Cu₃Sn/diamond interface based on the calculation results and analysis of interface energy, differential charge density model, and density of states. However, co-doping with both Fe and Mn weakens the wettability of the Cu₃Sn/diamond interface. Finally, wettability tests and microstructure characterizations demonstrate that the doping of Fe and Mn represents an effective approach to controlling the interface bonding performance of bronze/diamond composites.     

冻雨环境下润湿性表面覆冰黏附力测试方法

覆冰黏附力是仿生超疏水材料防结冰工程应用的关键技术指标之一. 根据覆冰样片降温过程中产生应变受冰层黏附力作用的原理, 提出利用电阻应变片传感器于模拟冻雨结冰环境下在线检测覆冰黏附力的方案. 应变片应变信号经数据采集、信号转换和软件处理, 实现了应变传感电压实时监测与在线显示, 结合受力分析对比计算出不同润湿性表面覆冰黏附力. 该方法可实时表征低温结冰环境下不同润湿性表面的结/融冰行为及覆冰黏附力变化趋势.