Thermo-desorption spectroscopy (TDS)

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Table of contents

CHAPTER 1. INTRODUCTION 
1.1 Hydrogen: energy carrier
1.2 Hydrogen storage
1.2.1 Physical storage
1.2.2 Chemical storage
1.3 Metal hydride formation
1.4 High-entropy alloys
1.4.1 Hydrogen storage in bcc HEAs
1.5 Project objectives and proposal
CHAPTER 2. MATERIALS & METHODS 
2.1 Synthesis of the alloys and related hydrides
2.1.1 High-energy ball milling
2.1.2 High-temperature arc melting
2.1.3 Hydride synthesis: hydrogenation of alloys
2.2 Hydrogen absorption characterization
2.2.1 Sievert’s methodology
2.2.2 Kinetics of absorption
2.2.3 Pressure-composition isotherms
2.2.4 Hydrogenation cycling test
2.3 Thermal analyses
2.3.1 Thermo-desorption spectroscopy
2.3.2 Differential scanning calorimetry
2.4 Structural characterization: diffraction techniques
2.4.1 Principle of diffraction
2.4.2 Laboratory X-ray diffraction
2.4.3 Synchrotron radiation X-ray diffraction
2.4.4 Neutron diffraction
2.4.5 The Rietveld method: structural refinement
2.5 Microstructural characterization
2.5.1 Scanning electron microscopy
2.5.2 Energy dispersive spectroscopy
PRELIMINARY RESULTS 
(I) Chemical Optimization
(I.I) Equimolar compositions
(I.II) Non-equimolar composition
(II) Analysis of three different syntheses methods.
(II.I) Synthesis of Ti-V-Zr-Nb: ArBM and HT-AM
(II.II) Synthesis of the hydride Ti-V-Zr-Nb-H by RBM
(II.III) Hydrogenation of the bcc alloys: ArBM and HT-AM
(II.IV) Hydrogen desorption of the hydrides: ArBM, HT-AM, and RBM
(II.V) Hydrogen absorption/desorption cycling
(II.VI) Summary and conclusions
CHAPTER 3: BASE ALLOY, TI-V-ZR-NB 
3.1 Synthesis of Ti-V-Zr-Nb
3.2 Hydrogenation of Ti-V-Zr-Nb
3.3 In-situ neutron diffraction
3.4 Thermo-desorption characterization
3.5 Hydrogen absorption/desorption cycling
3.6 Discussion with reported cases in the literature
CHAPTER 4: TI-V-ZR-NB-TA 
4.1 Synthesis of Ti-V-Zr-Nb-Ta
4.2 Hydrogenation of Ti-V-Zr-Nb-Ta
4.3 In-situ neutron diffraction
4.4 Thermo-desorption characterization
4.5 Hydrogen absorption/desorption cycling
4.6 Comparison with the quaternary alloy
CHAPTER 5: TI-V-ZR-NB-AL 
5.1 Synthesis of Ti-V-Zr-Nb-Al
5.2 Hydrogenation of Ti-V-Zr-Nb-Al
5.3 In-situ neutron diffraction
5.4 Thermo-desorption characterization
4.5 Hydrogen absorption/desorption cycling
5.6 Comparison with the quaternary alloy
CHAPTER 6: TI-V-ZR-NB-MG 
6.1 Synthesis of Ti-V-Zr-Nb-Mg
6.2 Hydrogenation of Ti-V-Zr-Nb-Mg
6.3 In-situ neutron diffraction
6.4 Thermo-desorption characterization
6.5 Hydrogen absorption/desorption cycling
6.6 Comparison with the quaternary alloy
6.5 Bibliography