So sánh phương pháp

	CALPHAD	Động lực học phân tử	Tinh luyện Rietveld bằng nhiễu xạ tia X (XRD)
Lĩnh vực	Khoa học vật liệu	Khoa học vật liệu	Khoa học vật liệu
Họ	Process / pipeline	Process / pipeline	Process / pipeline
Năm ra đời	1970	1957	1969
Người khởi xướng	Larry Kaufman	Alder and Wainwright	Hugo Rietveld
Loại	Computational method	Simulation method	Refinement method
Công trình gốc	Kaufman, L., & Bernstein, H. (1970). Computer Calculation of Phase Diagrams. Academic Press.	Alder, B. J., & Wainwright, T. E. (1957). Phase transition for a hard sphere system. The Journal of Chemical Physics, 27(5), 1208-1209.	Rietveld, H. M. (1969). A profile refinement method for nuclear and magnetic structures. Journal of Applied Crystallography, 2(2), 65-71.
Tên gọi khác	CALPHAD method, computational thermodynamics	MD simulation, molecular dynamics simulation, atomistic simulation	Rietveld refinement, powder diffraction refinement
Liên quan	3	3	3
Tóm tắt	CALPHAD (CALculation of PHAse Diagrams) is a computational method for predicting thermodynamic equilibrium properties and phase diagrams of multicomponent alloys. Pioneered by Larry Kaufman in 1970, CALPHAD combines experimental and computational data to assess thermodynamic properties of phases and subsequently predict equilibrium conditions. It is the standard methodology in physical metallurgy and materials design for alloy development, process optimization, and understanding phase stability.	Molecular Dynamics (MD) is a computational technique that simulates the motion of atoms and molecules by solving Newton's equations of motion under specified forces. Pioneered by Alder and Wainwright in 1957, MD integrates time-dependent atomic trajectories from initial positions, allowing prediction of material properties, phase transitions, and dynamic behavior. It bridges the gap between quantum mechanics (which determines interatomic forces) and macroscopic phenomena (accessible only through experiment), enabling study of timescales from femtoseconds to microseconds and length scales from angstroms to hundreds of nanometers.	XRD Rietveld Refinement is a method for extracting detailed crystal structure information from powder diffraction data by comparing observed and calculated diffraction patterns through least-squares refinement. Developed by Hugo Rietveld in 1969, this technique enables determination of atomic positions, occupancies, thermal parameters, and phase fractions directly from powder data without requiring single crystals. It is the standard approach in materials characterization for structural analysis, phase identification, and quantification.