With the popularization of 3D printing technology, micro/nanoparticles sintering technology has drawn lots of attentions all over the world. Here, molecular dynamic simulation is employed to discuss the effects of different interfacial lattice structures, different diameter of nanoparticles, and different heating rates on the coalescence of metallic Cu nanoparticles. The results showed that the diameter of nanoparticles determine the melting point of the system. Besides, the interfacial lattice structure, diameter of nanoparticles, and heating rate have an influence on the initial sintering temperature. This is because the melting point is the inherent property of material which relies on the mass of substance. However, the initial sintering temperature is sensitive to many factors, including the temperature, interfacial, and intermolecular interactions.

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具有不同界面晶格结构的铜纳米粒子的聚结：分子动力学研究

随着3D打印技术的普及，微/纳米颗粒烧结技术引起了世界各国的广泛关注。在这里，分子动力学模拟被用来讨论不同界面晶格结构、不同纳米粒子直径和不同加热速率对金属Cu纳米粒子聚结的影响。结果表明，纳米粒子的直径决定了体系的熔点。此外，界面晶格结构、纳米粒子的直径和加热速率对初始烧结温度有影响。这是因为熔点是物质的固有属性，它依赖于物质的质量。然而，初始烧结温度对许多因素很敏感，包括温度、界面、