Table of Contents

Preface



PART I: Thermodynamics



PHASE FORMATION IN MULTICOMPONENT MONOTECTIC AL-BASED ALLOYS

Introduction

Experimental Methods

Systematic Classification of Ternary Monotectic Phase Diagrams

Selected Ternary Monotectic Alloy Systems

Quaternary Monotectic Al-Bi-Cu-Sn System

Conclusion

LIQUID-LIQUID INTERFACIAL TENSION IN MULTICOMPONENT IMMISCIBLE AL-BASED ALLOYS

Introduction

Measurement Technique

Experimental Details

Results

Discussion

Summary

MONOTECTIC GROWTH MORPHOLOGIES AND THEIR TRANSITIONS

Introduction

Experimental Procedures

Experiemntal Results

Discussion

Outlook

THERMAL EXPANSION AND SURFACE TENSION OF MULTICOMPONENT ALLOYS

Introduction

Experimental

Results

Conclusion and Summary

MEASUREMENT OF THE SOLID-LIQUID INTERFACE ENERGY IN TERNARY ALLOY SYSTEMS

Introduction

Experimental Procedure

Evaluation of the Local Curvature of the Grain Boundary Grooves

Results and Discussion

Summary and Conclusions

PHASE EQUILIBRIA OF NANOSCALE METALS AND ALLOYS

Introduction

Phase Stability and Phase Transformations in Nanoscale Systems

Summary



PART II: Microscopic and Macroscopic Dynamics



MELT STRUCTURE AND ATOMIC DIFFUSION IN MULTICOMPONENT METALLIC MELTS

Introduction

Exerimental Details

Results and Discussion

Conclusions

DIFFUSION IN MULTICOMPONENT METALLIC METS NEAR THE MELTING TEMPERATURE

Introduction

Experimental Diffusion Techniques

Influence of Thermodynamic Forces on Diffusion

PHASE BEHAVIOR AND MICROSCOPIC TRANSPORT PROCESSES IN BINARY METALLIC ALLOYS: COMPUTER SIMULATION STUDIES

Introduction

Transport Coefficients

A Symmetric LJ Mixture with a Liquid-Liquid Demixing Transition

Structure, Transport, and Crystallization in Al-Ni Alloys

Summary

MOLECULAR DYNAMICS MODELING OF ATOMIC PROCESSES DURING CRYSTAL GROWTH IN METALLIC ALLOY MELTS

Introduction

Entropy and Free Enthalpy of Zr-rich NixZr1-x Melts from MD Simulations and Their Application to the Thermodynamics of Crystallization

Bridging the Gap between Phase Field Modeling and Molecular Dynamics Simulations. Dynamics of the Planar [NixZr1-x]Liquid-ZrCrystal Crystallization Front

Entropy and Free Enthalpy in Ternary AlyNi0.4-yZr0.6 Alloy Melts

Concluding Remarks

COMPUTATIONAL OPTIMIZATION OF MULTICOMPONENT BERNAL¿S LIQUIDS

Introduction

Methods

Results and Discussion

Conclusion

SOLIDIFICATION EXPERIMENTS IN SINGLE-COMPONENT AND BINARY COLLOIDAL MELTS

Introduction

Exerimental Procedure

Results

Conclusions



PART III: Nd-Fe Based Alloys



PHASE-FIELD SIMULATIONS OF Nd-Fe-B: NUCLEATION AND GROWTH KINETICS DURING PERITECTIC GROWTH

Introduction

Phase-Field Model with Hydrodynamic Convection

Investigating Heterogeneous Nucleation in Peritectic Materials via the Phase-Field Method

Conclusion

INVESTIGATIONS OF PHASE SELECTION IN UNDERCOOLED MELTS OF Nd-Fe-B ALLOYS USING SYNCHROTRON RADIATION

Introduction

Description of the Investigations

Experimental Results and Discussion

Analysis Within Models of Nucleation and Dendrite Growth

Summary and Conclusion

EFFECT OF VARYING MELT CONVECTION ON MICROSTRUCTURE EVOLUTION OF Nd-Fe-B AND Ti-Al PERITECTIC ALLOYS

Introduction

Methods Developed

Sample Preparation

Results and Discussion

Conclusion

NANOSIZED MAGNETIZATION DENSITY PROFILES IN HARD MAGNETIC Nd-Fe-Co-Al GLASSES

Introduction

SANS with Polarized Neutrons in Unsaturated Magnetic Systems

Experimental Procedure

Results and Discussion

Conclusion

MICROSTRUCTURE AND MAGNETIC PROPERTIES OF RAPIDLY QUENCHED (Nd100-xGax)80Fe20(x=0,5,10, and 15 at%) ALLOYS

Introduction

Sample Preparation and Experimental Investigations

Binary Nd80Fe20 Rapdily Quenched Alloys

Ternary (Nd100-xGax)80Fe20(x=5,10, and 15) Rapdily Quenched Alloys

Conclusions



PART IV: Solidification and Simulation



SOLIDIFICATION OF BINARY ALLOYS WITH COMPOSITIONAL STRESSES ¿ A PHASE-FIELD APPROACH

Introduction

Equations and Motion

Neutral Curves

Phase-Field Model

Simulation Results

Conclusion

ELASTIC EFFECTS ON PHASE TRANSITIONS IN MULTI-COMPONENT ALLOYS

Melting of Alloys in Eutectic and Peritectic Systems

Combined Motion of Melting and Solidification Fronts

Continuum Theory of Fast Crack Propagation

Summary

MODELING OF NONISOTHERMAL MULTI-COMPONENT, MULTI-PHASE SYSTEMS WITH CONVECTION

Introduction

Phase-Field Models for Multicomponent, Multiphase Systems

Multiphase Ginzburg-Landau Energies

Convective Phase-Field Models

Mathematical Analysis

PHASE-FIELD MODELING OF SOLIDIFICATION IN MULTI-COMPONENT AND MULTI-PHASE ALLOYS

Introduction

Phase-Field Model for Multicomponent and Multiphase Systems

Modeling of Dendritic Growth

Solute Trapping During Rapid Solidification

Comparison of Molecular Dynamics and Phase-Field Simulations

Modeling of Eutectic Growth

DENDRITE GROWTH AND GRAIN REFINEMENT IN UNDERCOOLED MELTS

Introduction

Solidification of Pure (One-Component) System

Solidification of Binary Alloys with Constitutional Effects

Solidification of a Ternary Alloy

Summary and Conclusion

DENDRITIC SOLIDIFICATION IN THE DIFFUSE REGINE AND UNDER THE INFLUENCE OF BUOYANCY-DRIVEN MELT CONVECTION

Introduction

The Multiphase-Field Model

Rapid Solidification in Ni98Al1Zr1

Directional Solidification with Buoyancy-Driven Interdendritic Flow

Summary and Conclusion

STATIONARY AND INSTATIONARY MORPHOLOGY FORMATION DURING DIRECTIONAL SOLIDIFICATION OF TERNARY EUTECTIC ALLOYS

Introduction

Investigations on the Eutectic Systems Ag-Cu-Zn

Investigation on the Ternary Alloy System In-Bi-Sn

Transient Growth

Summary and Conclusion

DENDRITRIC MICROSTRUCTURE, DECOMPOSITION, AND METASTABLE PHASE FORMATION IN THE BULK METALLIC GLASS MATRIX COMPOSITE Zr56Ti14Nb5Cu7Ni6Be12

Introduction

Experimental Procedures

Results and Discussion

Summary

About the Author

Dieter M. Herlach is currently a senior scientist at the German Aerospace Center (DLR) in Cologne as Head of the working group "Undercooling of Materials" and Professor of Physics at the Ruhr-University Bochum, Germany. He gained his PhD from the Technical University Aachen in 1981 and joined the DLR two years later. In 1991 he finished his Habilitation at the Ruhr-University Bochum where he became Full Professor of Physics in 2001. Dieter M. Herlach has been chairman of various working groups at the European Space Agency (ESA) and the German Physical Society (DPG), a consultant or honorary professor at various Chinese universities, and a visiting professor at Harvard University, USA. Professor Herlach has organized 16 workshops, symposia and conferences, is co-editor of Advanced Engineering Materials, and also has five books, four patents and over 280 journal publications to his name.