Modified embedded-atom method interatomic potentials for the Nb-C, Nb-N, Fe-Nb-C, and Fe-Nb-N systems

• Published in: Journal of materials research Vol. 25; no. 7; pp. 1288 - 1297
• Main Authors: Kim, Hyun-Kyu, Jung, Woo-Sang, Lee, Byeong-Joo
• Format: Journal Article
• Language: English
• Published: New York, USA Cambridge University Press 01.07.2010; Springer International Publishing
• Subjects: Applied and Technical Physics; Biomaterials; Inorganic Chemistry; Materials Engineering; Materials Science; Nanotechnology; Nb; N; C
• ISSN: 0884-2914; 2044-5326
• DOI: 10.1557/JMR.2010.0182

Modified embedded-atom method (MEAM) interatomic potentials for Nb-C, Nb-N, Fe-Nb-C, and Fe-Nb-N systems have been developed based on the previously developed MEAM potentials for lower order systems. The potentials reproduce various fundamental physical properties (structural properties, elastic properties, thermal properties, and surface properties) of NbC and NbN, and interfacial energy between bcc Fe and NbC or NbN, in generally good agreement with higher-level calculations or experimental information. The applicability of the present potentials to atomic-level investigations to the precipitation behavior of complex-carbonitrides (Nb,Ti)(C,N) as well as NbC and NbN, and their effects on the mechanical properties of steels are also discussed.