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First-Principles Calculations and CALPHAD Modeling of Thermodynamics

  • Zi-Kui LiuEmail author
Basic and Applied Research

Abstract

Thermodynamics is the key component of materials science and engineering. The manifestation of thermodynamics is typically represented by phase diagrams, traditionally for binary and ternary systems. Consequently, the applications of thermodynamics have been rather limited in multicomponent engineering materials. Computational thermodynamics, based on the CALPHAD approach developed in the last few decades, has released the power of thermodynamics and enabled scientists and engineers to make phase stability calculations routinely for technologically important engineering materials. Within the similar time frame, first-principles quantum mechanics technique based on density functional theory has progressed significantly and demonstrated in many cases the accuracy of predicted thermodynamic properties comparable with experimental uncertainties. In this paper, the basics of the CALPHAD modeling and first-principles calculations are presented emphasizing current multiscale and multicomponent capability. Our research results on integrating first-principles calculations and the CALPHAD modeling are discussed with examples on enthalpy of formation at 0 K, thermodynamics at finite temperatures, enthalpy of mixing in binary and ternary substitutional solutions, defect structure and lattice preference, and structure of liquid, super-cooled liquid, and glass.

Keywords

ab initio methods CALPHAD CALPHAD approach computational studies first principles thermodynamics 

Notes

Acknowledgments

The author greatly appreciates the support from National Science Foundation under grants 9983532 (CAREER), 0073836, 0205232, 0209624, 0510180, 0514592, and 0541674, Department of Energy through the grant DE-ED1803000, the United States Automotive Materials Partnership (USAMP) of Department of Energy through cooperative agreement No. DE-FC05-02OR22910, Office of Naval Research for the grant N0014-07-1-0638, and US Army Research Laboratory for the grant W911NF-08-2-0064. The author would also like to thank the students and research fellows at the Phases Research Lab at Penn State for their diligent work, particularly those whose publications are cited in the paper, i.e., Raymundo Arroyave, Carl Brubaker, Swetha Ganeshan, William Golumbfskie, Takayuki Honda, Chao Jiang, Manjeera Mantina, Koray Ozturk, Sara Prins, James Saal, Shun Li Shang, Dongwon Shin, Tao Wang, Yi Wang, Mei Yang, Hui Zhang, Shengjun Zhang, Yu Zhong, and Shihuai Zhou. It should be mentioned that Prof. Jorge Sofo, Dr. Yi Wang, Dr. Shun Li Shang, and Dr. Raymundo Arroyave have been instrumental in developing our expertise in first-principles calculations. The author is grateful for opportunities to collaborate with many colleagues at the Pennsylvania State University and other universities in the US and China as evidenced in the references cited. Particularly, the long-term collaborations with Prof. Long-Qing Chen at the Pennsylvania State University, Prof. Chris Wolverton at Northwestern University, Dr. Alan Luo from General Motor Company, and Prof. Xidong Hui from University of Science and Technology Beijing (USTB) have been very enjoyable and fruitful. The author thanks Ms. Chelsey Zacherl for her careful reading of the manuscript.

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© ASM International 2009

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringThe Pennsylvania State UniversityUniversity ParkUSA

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