Maozhi Li

Amorphous System and Theory

Renmin University of China

Beijing, China, 100872

Email: maozhili@ruc.edu.cn

Biography

    Prof. Maozhi Li is now working in Department of Physics, Renmin University of China. In 2001, he received PhD in condensed matter physics from Institute of Physics, Chinese Academy of Sciences. From 2001 to 2006, he did his postdoctoral research in Iowa State University. After that, he worked in Ames Laboratory as assistant scientist. From October 2007, he joined in Renmin University of China. Now his research interests mainly focus on: (1) atomistic modeling and simulation study of structural, dynamical and electronic properties as well as phase transformation of condensed matter systems including liquid and amorphous materials; (2) structure and dynamics of metallic liquids and glasses, including nature of glass and glass transition.

Abstract for Presentation

Characterization of medium-range structures and
correlation with properties in metallic glass-forming liquids

   Uncovering the structure-property relationship of metallic glass-forming systems
is crucial for understanding the nature of glass transition, glass-forming ability, and mechanical properties. It has been revealed that icosahedral short-range order is an important structure motif for dynamical slowdown in supercooled liquids, stability of supercooled liquids against crystallization, and formation of metallic glasses (MGs). On the other hand, medium-range order (MRO) has been also revealed to be key to the structure-property relation in MGs. However, quantitative characterization of MRO in metallic glass-forming systems is a fundamental challenge, and its correlation with properties still remain elusive, hampering the understanding of MG properties. In this talk, I will introduce the characterization of MRO formed by the connection of atomic clusters. Graph theory was introduced to quantitatively characterize MRO. The correlation between MRO and dynamical and mechanical properties in metallic glassforming systems was systematically investigated. We find that MRO plays fundamental and controlling roles in structure-property relation in metallic liquids and glasses. Our findings provide new insights into the characteristics of MRO and structure-property relationship in metallic liquids and glasses.

References

[1] Z. W. Wu, M. Z. Li*, W. H. Wang, K. X. Liu, Phys. Rev. B, 88 (2013) 054202.

[2] Z. W. Wu, M. Z. Li*, W. H. Wang, K. X. Liu, Nature Commun., 6 (2015) 6035

[3] Z. W. Wu, F. X. Li, C. W. Huo, M. Z. Li*, W. H. Wang, K. X. Liu, Sci. Rep., 6 (2016) 35967