高压物理学报2026，Vol.40Issue(5)：44-54,11.DOI:10.11858/gywlxb.20251176
初始Ⅰ型构型下单重态-双重态Al纳米球高速碰撞下相变及烧结机理的分子动力学研究
Phase Transformation,Sintering Mechanism and Dynamics of Singlet-Doublet Al Nanosphere Collisions with Initial Ⅰ-Shaped Configuration
摘要
Abstract
Molecular dynamics simulations are used to study the dynamics of a single Al nanosphere(singlet)colliding with an aggregate of two Al nanospheres(doublet)with initial Ⅰ-shaped configuration.Depending on the initial impact velocity,there are four collision outcomes,namely bounce,adhesion,aggregation and melting.At a very low velocity,the repulsive force between the nanospheres leads the nanospheres to rebound without contact,and the critical velocity of bounce decreases with the increase of the diameter of the nanosphere.As the velocity increases,the nanospheres are sintered together due to adhesion between them and the formation of new bonds.The phase transformation and atomic diffusion during singlet-doublet collisions are quantitatively characterized by common neighbor analysis,dislocation analysis and mean square displacement to explore the underlying sintering mechanism.The critical impact velocity of singlet melting is obtained by monitoring the temperature of singlet with different diameters.关键词
纳米颗粒/高速撞击/分子动力学模拟/烧结/微观组织演变Key words
nanosphere/high-velocity impact/molecular dynamics simulation/sintering/microstructural evolution分类
数理科学引用本文复制引用
蒋俊,孙伟福..初始Ⅰ型构型下单重态-双重态Al纳米球高速碰撞下相变及烧结机理的分子动力学研究[J].高压物理学报,2026,40(5):44-54,11.基金项目
重庆市自然科学基金杰出青年学者专项(CTSB2022NSCQ-JQX0011) （CTSB2022NSCQ-JQX0011）
