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ACTA MATERIALIA

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21,570 papers
Kinetics of Monolayer and Bilayer Graphene Nano-Ribbon Formation on 3C-SiC: Influence of Substrate Geometry and Growth Conditions

Michael MacIsaac, Salil Bavdekar, Richard Hennig, Douglas Spearot et al.

For the first time, epitaxial graphene (EG) growth kinetics on {110} facets of 3C-SiC is investigated using molecular dynamics simulations. Graphene nanoribbon (GNR) formation is simulated using a machine learned force field for the Si-C system and is quantified via a new graph-based carbon-ring type and layer analysis method. We examine the effects of substrate facet height an…

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From heat capacity to Gibbs energy: An experimental thermodynamic route for single-phase high-entropy alloys

E. Strumza, K. Lilova, T. Subramani, A. Navrotsky et al.

A comprehensive experimental methodology is developed to determine thermodynamic functions of single-phase AlₓCoCrFeNi high-entropy alloys (HEAs). The approach integrates calorimetry, thermophysical measurements, and physically based entropy models. Low-temperature heat capacity, Cp(T), was measured from 4 to 473 K, while high-temperature Cp(T) was obtained near the solidus. Co…

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Formation of the Cellular Structure in the Sm2Co17-type Permanent Magnets: a Phase-Field Study

Ben Tian, Xiaoqin Ke, Chuanxin Liang, Lei Liu et al.

The cellular structure with ordered rhombohedral (R) phase in the cells and disordered hexagonal (H) phase in the cell boundary is key to the high coercivity and large magnetic energy product of the Sm2Co17-type permanent magnets. However, a theoretical understanding on the formation of the cellular structure is still lacking. Here in this work, we developed a phase field model…

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A closed-loop multiscale computational framework for predicting barocaloric effects: Entropy decomposition and transformation mechanisms

Renhai Shi, Ruying Chen, Yonggang Li, Jian-Zhong Jiang et al.

The predictive design of metallic barocaloric materials requires a unified framework linking thermodynamics, atomistic mechanisms, and transformation kinetics. Here, we develop a closed-loop multiscale Integrated Computational Materials Engineering (ICME) framework combining quasi-harmonic thermodynamic modeling, density functional theory, and molecular dynamics simulations to …

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