Preface ........................................................ хi
1 Introduction ................................................. 1
Context ...................................................... 1
Perspectives ................................................. 2
Definitions .................................................. 4
Sintering Techniques ......................................... 6
Knowledge .................................................... 7
Key Resources ................................................ 9
References .................................................. 10
2 History of Sintering ........................................ 13
Historical Milestones ....................................... 13
Early Sintered Products ..................................... 14
Interdependent Developments ................................. 35
Key Lessons from Sintering History .......................... 36
References .................................................. 37
3 Infrastructure Developments ................................. 41
Qualitative Sintering Theory ................................ 41
Emergence of Quantitative Sintering Concepts ................ 44
Infrastructure Development .................................. 46
Experimental Tools .......................................... 55
Organizational Advances ..................................... 60
Integration ................................................. 60
Status of Sintering Theory .................................. 63
References .................................................. 64
4 Measurement Tools and Experimental Observations ............. 71
Changes During Sintering .................................... 71
Particle Bonding ............................................ 75
Mechanical Properties ....................................... 82
Dimensional Change .......................................... 90
Density, Densification, Porosity ........................... 102
Conductivity ............................................... 104
Magnetic Properties ........................................ 106
Surface Area and Gas Permeability .......................... 106
Pore Structure ............................................. 110
Microstructure ............................................. 115
Thermal Properties ......................................... 121
Summary .................................................... 123
References ................................................. 126
5 Early Quantitative Treatments .............................. 131
Introduction ............................................... 131
Onset of Sintering Science ................................. 132
Copper Sintering ........................................... 132
References ................................................. 138
6 Geometric Trajectories during Sintering .................... 141
Overview ................................................... 141
Stages of Sintering ........................................ 142
Interface Curvature and Energy ............................. 151
Microstructure Changes ..................................... 157
Macrostructure Changes-Component Size and Shape ............ 172
Surface Area Trajectory .................................... 175
Summary .................................................... 177
References ................................................. 179
7 Thermodynamic and Kinetic Treatments ....................... 183
Curvature Gradients and Stress ............................. 183
Atmospheric Reactions ...................................... 185
Mass Transport Mechanisms .................................. 188
Kinetic Relations .......................................... 203
Processing Variables ....................................... 217
Summary .................................................... 221
References ................................................. 223
8 Microstructure Coarsening .................................. 227
Introduction ............................................... 227
Grain Coarsening ........................................... 232
Pore Structure Changes ..................................... 239
Coarsening Interactions .................................... 240
Summary .................................................... 242
References ................................................. 243
9 Sintering With a Liquid Phase .............................. 247
Overview ................................................... 247
Conceptual Developments .................................... 248
Microstructure Development ................................. 252
Preliquid Stage ............................................ 271
Liquid Formation ........................................... 273
Solution-Reprecipitation ................................... 276
Final Stage Solid Skeletal Sintering ....................... 287
Transient Liquids .......................................... 287
Supersolidus Sintering ..................................... 289
Reactive Liquids ........................................... 294
Infiltration Sintering ..................................... 295
Activated Liquid Phase Sintering ........................... 297
Practical Aspects .......................................... 298
Summary .................................................... 299
References ................................................. 299
10 Sintering With External Pressure ........................... 305
Role of External Pressure .................................. 305
Thermal Softening .......................................... 307
Pressure Effects ........................................... 309
Diffusion and Creep ........................................ 315
Multiple Mechanism Densification Rates ..................... 326
Density and Mechanism Maps ................................. 327
Microstructure Evolution ................................... 330
Pressure Application Techniques ............................ 331
Densification Limitations .................................. 350
References ................................................. 350
11 Mixed Powders and Composites ............................... 355
Importance ................................................. 355
Physical Interactions ...................................... 356
Chemical Interactions ...................................... 363
Solubility Role ............................................ 363
Co-fire, Laminated, and Bimaterial Sintering ............... 378
Summary .................................................... 380
References ................................................. 381
12 Rapid Heating Approaches ................................... 387
Introduction ............................................... 387
Early Demonstrations ....................................... 390
Nanoscale Options .......................................... 393
Rapid Heating Techniques ................................... 395
Exothermic ................................................. 395
Supplemental Pressure ...................................... 407
Prospects .................................................. 408
References ................................................. 409
13 Nanoscale Sintering ........................................ 413
Overview ................................................... 413
Role of Particle Size ...................................... 417
Sintering Temperature ...................................... 420
Unchanged Thermodynamics ................................... 421
Time-Temperature-Particle Size ............................. 422
Models versus Experiment ................................... 422
Solution Windows ........................................... 423
Two-Step Sintering ......................................... 427
Opportunities .............................................. 428
References ................................................. 428
14 Computer Models ............................................ 433
introduction ............................................... 433
Procedures ................................................. 438
Data Requirements .......................................... 441
Atomistic Calculations ..................................... 443
Reshaping Models ........................................... 448
Physical Event Models ...................................... 450
Monte Carlo Methods ........................................ 455
Continuum Models and Finite Element Analysis ............... 456
Discrete Element Method .................................... 459
Master Sintering Curve ..................................... 462
Neural Networks ............................................ 463
Summary Comments ........................................... 464
References ................................................. 465
15 Sintering Practice ......................................... 471
Critical Metrics ........................................... 471
Control Parameters ......................................... 480
Atmosphere ................................................. 481
|