השוואת שיטות

	CALPHAD	ריפוי רייטבלד (Rietveld Refinement) ב-XRD
תחום	מדעי החומרים	מדעי החומרים
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1970	1969
הוגה השיטה	Larry Kaufman	Hugo Rietveld
סוג	Computational method	Refinement method
מקור מכונן	Kaufman, L., & Bernstein, H. (1970). Computer Calculation of Phase Diagrams. Academic Press.	Rietveld, H. M. (1969). A profile refinement method for nuclear and magnetic structures. Journal of Applied Crystallography, 2(2), 65-71.
כינויים	CALPHAD method, computational thermodynamics	Rietveld refinement, powder diffraction refinement
קשורות	3	3
תקציר	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.	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.