Alexander A. Gromov and Ulrich Teipel, "Metal Nanopowders: Production, Characterization, and Energetic Applications"
English | ISBN: 3527333614 | 2014 | 440 pages | PDF | 13 MB
Written with both postgraduate students and researchers in academia and industry in mind, this reference covers the chemistry behind metal nanopowders, including production, characterization, oxidation and combustion. The contributions from renowned international scientists working in the field detail applications in technologies, scale¨Cup processes and safety aspects surrounding their handling and storage.
Contents
Foreword XIII
List of Contributors XV
Introduction XIX
1 Estimation of Thermodynamic Data of Metallic Nanoparticles
Based on Bulk Values 1
Dieter Vollath and Franz Dieter Fischer
1.1 Introduction 1
1.2 Thermodynamic Background 2
1.3 Size-Dependent Materials Data of Nanoparticles 4
1.4 Comparison of Experimental and Calculated Melting
Temperatures 8
1.5 Comparison with Data for the Entropy of Melting 16
1.6 Discussion of the Results 17
1.7 Conclusions 19
1.A Appendix: Zeros and Extrema of the Free Enthalpy of Melting
Gm-nano 20
References 21
2 Numerical Simulation of Individual Metallic Nanoparticles 25
D.S. Wen and P.X. Song
2.1 Introduction 25
2.2 Molecular Dynamics Simulation 27
2.2.1 Motion of Atoms 27
2.2.2 Temperature and Potential Energy 28
2.2.3 Ensembles 29
2.2.4 Energy Minimization 30
2.2.5 Force Field 30
2.2.6 Potential Truncation and Neighbor List 31
2.2.7 Simulation Program and Platform 32
2.3 Size-Dependent Properties 33
2.3.1 Introduction 33
2.3.2 Simulation Setting 34
2.3.3 Size-Dependent Melting Phenomenon 35
2.4 Sintering Study of Two Nanoparticles 38
2.4.1 Introduction 38
2.4.2 Simulation Setting 40
2.4.3 Sintering Process Characterization 40
2.5 Oxidation of Nanoparticles in the Presence of Oxygen 45
2.5.1 Introduction 45
2.5.2 Simulation Setting 47
2.5.3 Characterization of the Oxidation Process 48
2.6 Heating and Cooling of a Core ¨C Shell Structured Particle 54
2.6.1 Simulation Method 54
2.6.2 Heating Simulation 56
2.6.2.1 Solidification Simulation 59
2.7 Chapter Summary 61
References 63
3 Electroexplosive Nanometals 67
Olga Nazarenko, Alexander Gromov, Alexander Il¡¯in, Julia Pautova, and
Dmitry Tikhonov
3.1 Introduction 67
3.2 Electrical Explosion of Wires Technology for Nanometals
Production 67
3.2.1 The Physics of the Process of Electrical Explosion of Wires 68
3.2.2 Nonequilibrium State of EEW Products ¨C Nanometals 70
3.2.3 The Equipment Design for nMe Production by Electrical Explosion of
Wires Method 71
3.2.4 Comparative Characteristics of the Technology of Electrical Explosion of Wires 73
3.2.5 The Methods for the Regulation of the Properties of Nanometals
Produced by Electrical Explosion of Wires 74
3.3 Conclusion 75
Acknowledgments 75
References 76
4 Metal Nanopowders Production 79
M. Lerner, A. Vorozhtsov, Sh. Guseinov, and P. Storozhenko
4.1 Introduction 79
4.2 EEW Method of Nanopowder Production 81
4.2.1 Electrical Explosion of Wires Phenomenon 81
4.2.2 Nanopowder Production Equipment 84
4.3 Recondensation NP-Producing Methods: Plasma-Based
Technology 85
4.3.1 Fundamentals of Plasma-Chemical NP Production 89
4.3.2 Vortex-Stabilized Plasma Reactor 90
4.3.3 Starting Material Metering Device (Dispenser) 92
4.3.4 Disperse Material Trapping Devices (Cyclone Collectors and
Filters) 93
4.3.5 NP Encapsulation Unit 94
4.4 Characteristics of Al Nanopowders 95
4.5 Nanopowder Chemical Passivation 97
4.6 Microencapsulation of Al Nanoparticles 99
4.7 The Process of Producing Nanopowders of Aluminum by
Plasma-Based Technology 102
4.7.1 Production of Aluminum Nanopowder 102
4.7.2 Some Properties of Produced Nanopowders of Aluminum, Boron, Aluminum Boride, and
Silicon 103
References 104
5 Characterization of Metallic Nanoparticle Agglomerates 107
Alfred P. Weber
5.1 Introduction 107
5.2 Description of the Structure of Nanoparticle Agglomerates 108
5.3 Experimental Techniques to Characterize the Agglomerate
Structure 112
5.3.1 TEM and 3-D TEM Tomography 113
5.3.2 Scattering Techniques 115
5.3.3 Direct Determination of Agglomerate Mass and Size 117
5.4 Mechanical Stability 120
5.5 Thermal Stability 124
5.6 Rate-Limiting Steps: Gas Transport versus Reaction Velocity 126
5.7 Conclusions 127
Acknowledgments 128
References 128
6 Passivation of Metal Nanopowders 133
Alexander Gromov, Alexander Il¡¯in, Ulrich Teipel, and Julia Pautova
6.1 Introduction 133
6.2 Theoretical and Experimental Background 136
6.2.1 Chemical and Physical Processes in Aluminum Nanoparticles during
Their Passivation by Slow Oxidation under Atmosphere
(Ar + Air) 136
6.2.2 Chemical Mechanism of Aluminum Nanopowder Passivation by Slow
Air Oxidation 140
6.3 Characteristics of the Passivated Particles 143
6.3.1 Characteristics of Aluminum Nanopowders, Passivated by Gaseous and Solid Reagents
(Samples No 1 ¨C 6, Table 6.7) 148
6.3.2 Characteristics of Aluminum Nanopowders, Passivated by Gaseous and Solid Reagents
(Samples No 7 ¨C 11, Table 6.7) 149
6.4 Conclusion 150
Acknowledgments 150
References 150
7 Safety Aspects of Metal Nanopowders 153
M. Lerner, A. Vorozhtsov, and N. Eisenreich
7.1 Introduction 153
7.2 Some Basic Phenomena of Oxidation of Nanometal Particles in
Air 154
7.3 Determination of Fire Hazards of Nanopowders 155
7.4 Sensitivity against Electrostatic Discharge 158
7.5 Ranking of Nanopowders According to Hazard Classification 159
7.6 Demands for Packing 160
References 161
8 Reaction of Aluminum Powders with Liquid Water and Steam 163
Larichev Mikhail Nikolaevich
8.1 Introduction 163
8.2 Experimental Technique for Studying Reaction Al Powders with
Liquid and Gaseous Water 166
8.2.1 Oxidation of Aluminum Powder with Distilled Water 168
8.3 Oxidation of Aluminum Powder in Water Vapor Flow 174
8.4 Nanopowders Passivated with Coatings on the Base of Aluminum
Carbide 175
8.5 Study of Al Powder/H2 O Slurry Samples Heated Linear in ¡®¡®Open
System¡¯¡¯ by STA 183
8.6 Ultrasound (US) and Chemical Activation of Metal Aluminum
Oxidation in Liquid Water 184
8.7 Conclusion 194
Acknowledgments 195
References 195
9 Nanosized Cobalt Catalysts for Hydrogen Storage Systems Based on
Ammonia Borane and Sodium Borohydride 199
Valentina I. Simagina, Oksana V. Komova, and Olga V. Netskina
9.1 Introduction 199
9.1.1 Experimental 200
9.1.2 Study of the Activity of Nanosized Cobalt Boride Catalysts Forming in the Reaction
Medium of Sodium Borohydride and Ammonia
Borane 202
9.2 A Study of Nanosized Cobalt Borides by Physicochemical
Methods 204
9.2.1 A Study of the Crystallization of Amorphous Cobalt Borides Forming in the Medium of
Sodium Borohydride and Ammonia Borane 208
9.2.2 The Effect of the Reaction Medium on the State of Cobalt Boride
Catalysts 214
9.3 Conclusions 223
Acknowledgments 224
References 224
10 Reactive and Metastable Nanomaterials Prepared by Mechanical
Milling 227
Edward L. Dreizin and Mirko Schoenitz
10.1 Introduction 227
10.2 Mechanical Milling Equipment 228
10.3 Process Parameters 229
10.4 Material Characterization 232
10.5 Ignition and Combustion Experiments 233
10.6 Starting Materials 235
10.7 Mechanically Alloyed and Metal ¨C Metal Composite Powders 236
10.7.1 Preparation and Characterization 236
10.7.2 Thermal Analysis 242
10.7.3 Heated Filament Ignition 245
10.7.4 Constant Volume Explosion 249
10.7.5 Lifted Laminar Flame (LLF) Experiments 250
10.8 Reactive Nanocomposite Powders 254
10.8.1 Preparation and Characterization 256
10.8.2 Thermally Activated Reactions and their Mechanisms 257
10.8.3 Ignition 263
10.8.4 Particle Combustion Dynamics 267
10.8.5 Constant Volume Explosion 268
10.8.6 Consolidated Samples: Mechanical and Reactive Properties 271
10.9 Conclusions 273
References 274
11 Characterizing Metal Particle Combustion In Situ: Non-equilibrium
Diagnostics 279
Michelle Pantoya, Keerti Kappagantula, and Cory Farley
11.1 Introduction 279
11.2 Ignition and Combustion of Solid Materials 281
11.2.1 Ignition 281
11.2.2 Propagation 282
11.2.3 Flame Speeds 286
11.3 Aluminum Reaction Mechanisms 287
11.4 The Flame Tube 289
11.5 Flame Temperature 292
11.5.1 Background 292
11.5.2 Radiometer Setup 294
11.5.3 Infrared Setup 295
11.5.4 Linking Radiometer and IR Data for a Spatial Distribution of
Temperature 295
11.6 Conclusions 297
Acknowledgments 297
References 297
12 Characterization and Combustion of Aluminum Nanopowders in
Energetic Systems 301
Luigi T. De Luca, Luciano Galfetti, Filippo Maggi, Giovanni Colombo, Christian Paravan, Alice
Reina, Stefano Dossi, Marco Fassina, and Andrea Sossi
12.1 Fuels in Energetic Systems: Introduction and Literature Survey 301
12.1.1 An Overall Introduction to Energetic Systems 302
12.1.2 Experimental Investigations on Micro and Nano Energetic
Additives 304
12.1.3 Theoretical/Numerical Investigations on Energetic Additives 305
12.1.4 Thermites 308
12.1.4.1 Nanocomposite Thermites 308
12.1.5 Explosives 311
12.1.6 A Short Historical Survey of SPLab Contributions 315
12.1.7 Concluding Remarks on Energetic Additives 319
12.2 Thermochemical Performance of Energetic Additives 319
12.2.1 Ideal Performance Analysis of Metal Fuels 319
12.2.2 Solid Propellant Optimal Formulations 320
12.2.3 Hybrid Rocket Performance Analysis 322
12.2.4 Oxidizing Species in Hybrid Rocket Nozzles 324
12.2.5 Active Aluminum Content and Performance Detriment 325
12.2.6 Two-Phase Losses 326
12.2.7 Concluding Remarks on Theoretical Performance 329
12.3 Nanosized Powder Characterization 330
12.3.1 Introduction 330
12.3.2 Facilities Used for Nanosized Powder Analyses 331
12.3.3 Tested nAl Powders: Production, Coating, and Properties 331
12.3.3.1 Production of nAl Particles 331
12.3.3.2 Coating of nAl Particles 332
12.3.3.3 Morphology and Internal Structure of nAl Particles 333
12.3.3.4 BET Area and Aluminum Content of nAl Particles 333
12.3.4 DSC/TGA Slow Heating Rate Reactivity 337
12.3.4.1 Nonisothermal Oxidation of 50 nm Powder 338
12.3.4.2 Nonisothermal Oxidation of 100 nm Powder 339
12.3.4.3 Passivation/Coating Efficiency 339
12.3.5 High Heating Rate Reactivity 341
12.3.5.1 nAl Powder Ignition Experimental Setup 341
12.3.5.2 nAl Powder Ignition Representative Results 342
12.3.6 CCP Collection by Strand Burner 344
12.3.6.1 Condensed Combustion Product Analysis 344
12.3.7 Concluding Remarks on Powder Characterization 350
12.4 Mechanical and Rheological Behavior with Nanopowders 350
12.4.1 Solid Propellants and Fuels: Mechanical and Rheological
Behavior 350
12.4.2 Viscoelastic Behavior 352
12.4.3 Additive Dispersion 354
12.4.4 Rheology of Suspensions 355
12.4.5 Aging Effects 359
12.4.6 Experimental Results: Data Processing and Discussions 360
12.4.7 Tested Formulations 361
12.4.8 Uniaxial Tensile Stress ¨C Strain Tests 362
12.4.9 Dynamic Mechanical Analysis 364
12.4.10 Rheological Tests 365
12.4.11 Concluding Remarks 367
12.5 Combustion of Nanopowders in Solid Propellants and Fuels 367
12.5.1 Solid Rocket Propellants 368
12.5.1.1 Particle Clustering Phenomena 368
12.5.1.2 Propellant Volume Microstructure 369
12.5.1.3 Steady Combustion Mechanisms of AP/HTPB-Based Composite
Propellants 370
12.5.1.4 Transient Combustion Mechanisms 374
12.5.1.5 Concluding Remarks 379
12.5.2 Solid Rocket Fuels for Hybrid Propulsion 380
12.5.2.1 Tested Ingredients and Solid Fuel Formulations 380
12.5.2.2 Experimental Setup 381
12.5.2.3 Time-Resolved Regression Rate 383
12.5.2.4 Ballistic Characterization: Analyses of the Results 386
12.5.2.5 Concluding Remarks on Solid Fuel Burning 394
12.5.3 Chapter Summary 395
Nomenclature 396
References 400
Index 411
English | ISBN: 3527333614 | 2014 | 440 pages | PDF | 13 MB |