Abstract

Amorphous metallic foams are prospective materials due to unique combination of their mechanical and energy-absorption properties. In the present work, atomistic dynamics simulations are performed under isobaric conditions with the pressure p = 1.0 atm in order to study how cooling with extremely high rates (5 × 10¹³–5 × 10¹⁴ K/s) affects the formation of pores in amorphous titanium nickelide. For equilibrium liquid phase, vaporization temperature T_b and the equation of states in the form of ρ(T) are determined. It is found that the porosity of this amorphous solid does not depend on cooling at such high rates, whereas the pore morphology depends on the magnitude of the cooling rate. The obtained results will be in demand in study of mechanical properties of amorphous metallic foams with a nanoporous structure.

中文翻译：

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超快等压冷却产生纳米孔结构的非晶态Ni 50 Ti 50合金

摘要

非晶态金属泡沫由于其机械性能和能量吸收性能的独特结合而成为潜在的材料。在目前的工作中，在压力为p = 1.0 atm的等压条件下进行了原子动力学模拟，以研究以极高的速率（5×10 ¹³ –5×10 ¹⁴ K / s）进行的冷却如何影响孔中的孔隙形成。非晶态镍化钛。对于平衡液相，汽化温度T _b和状态方程为ρ（T）确定。已经发现，这种无定形固体的孔隙率不取决于以如此高的速率冷却，而孔的形态取决于冷却速率的大小。在研究具有纳米孔结构的无定形金属泡沫的机械性能时，将需要获得的结果。