声明
摘要
Abstract
Chapter 1.Introduction
1.1 History of Magnetism
1.2 Introduction to permanent magnets
1.3 Origin of Ferromagnetism
1.4 Magnetic Behavior
1.4.1 Diamagnetism
1.4.2 Paramagnetism
1.4.3 Ferromagnetism
1.4.4 Anti-ferromagnetism
1.4.5 Ferrimagnetism
1.5 Intrinsic Properties
1.5.1 Saturation Magnetization
1.5.2 Anisotropy
1.5.3 Magnetocrystalline anisotropy
1.5.4 Shape anisotropy
1.6 Magnetic domain
1.7 Hysteresis loop
1.7.1 Remanence
1.7.2 Coercivity
1.7.3 Maximum Energy Product
1.8 Coercivity mechanism
1.8.1 Nucleation
1.8.2 Domain wall pinning
1.9 Objective of the study
Chapter 2.Literature Review
2.1 Neodymium Iron Boron Magnet
2.2 Production of Nd-Fe-B
2.3 Melt Spinning Technique
2.4 Nd-Fe-B-Zr Alloy
2.5 Phosphorous doped melt spun ribbon
3.1 Material selection
3.2 Electric Arc Furnace
3.3 Melt Spinning Machine
3.4 Vibrating Sample Magnetometer(VSM)
3.5 X-Ray Diffraction(XRD)
3.5.1 Fundamental Principle of XRD
3.5.2 Instrumentation and specification
3.6 Scanning Electron Microscopy
3.7 Elemental Analysis by Energy Dispersive Spectroscopy(EDS)
Chapter 4.Results and Discussion
4.1.1 Pr9.5Fe84B6.5
4.1.2 Pr9.5Fe83B6.5Zr1
4.1.3 Pr9.5Fe82B6.5Zr2
4.1.4 Pr9.5Fe81B6.5Zr3
4.2 Magnetic properties of Pr9.5Fe84-xB6.4P0.1Zrx as-spun ribbon alloy
4.2.1 Pr9.5Fe84B6.4P0.1
4.2.2 Pr9.5Fe83B6.4P0.1Zr1
4.2.3 Pr9.5Fe82B6.4P0.1Zr2
4.2.4 Pr9.5Fe81B6.4P0.1Zr3
Conclusion
References
Acknowledgement
山东大学;