DESIGN, ASSEMBLY AND CHARACTERIZATION OF COMPOSITE ...

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Driven by reduction of free energy, a wetting liquid preferentially flows to smaller capillaries. When there is insufficient liquid to fill all the pores, the wetting liquid pulls the particles together to minimize the energy. This gives rise to the rearrangement. In contrast, a poor wetting liquid causes swelling of the compact, and may possibly exude liquid from surface pores. In sintering practice, the spreading of the liquid phase should be confined within the particle compact to prevent loss of liquid phase; preferably, noble metal crucible or substrate should be used. 2.5.4.7 Solubility of Small Particles The effect of size on the solubility of small particles may be described as:
Driven by reduction of free energy, a wetting liquid preferentially flows to smaller capillaries. When there is insufficient liquid to fill all the pores, the wetting liquid pulls the particles together to minimize the energy. This gives rise to the rearrangement. In contrast, a poor wetting liquid causes swelling of the compact, and may possibly exude liquid from surface pores. In sintering practice, the spreading of the liquid phase should be confined within the particle compact to prevent loss of liquid phase; preferably, noble metal crucible or substrate should be used. 2.5.4.7 Solubility of Small Particles The effect of size on the solubility of small particles may be described as:
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DESIGN, ASSEMBLY AND CHARACTERIZATI
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ACKNOWLEDGEMENTS First and foremost
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CHAPTER 5 BARIUM TITANATE NICKEL CO
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Table 6.1 Formulations of aqueous c
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Figure 2.12 Schematic illustrations
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Figure 2.35 Schematic of the SHS pr
Page 13 and 14: Figure 4.9 Sintered nickel lattices
Page 15 and 16: Figure 6.12 Optical image of the cr
Page 17 and 18: 1.1. Motivation CHAPTER 1 INTRODUCT
Page 19 and 20: and characterizing rheological prop
Page 21 and 22: 2.1. Materials System CHAPTER 2 BAC
Page 23 and 24: 2.2. Reentrant Structures and Ceram
Page 25 and 26: devices would provide self-sustaini
Page 27 and 28: a) b) Figure 2.4 Schematic illustra
Page 29 and 30: production of concept models, injec
Page 31 and 32: Fused Deposition Modeling (FDM) was
Page 33 and 34: Laser Engineered Net Shaping (LENS)
Page 35 and 36: Inkjet printing (IP) 27 is based on
Page 37 and 38: Table 2.1 Comparisons of various SF
Page 39 and 40: Figure 2.11 Processing steps involv
Page 41 and 42: 2.4.1 Colloidal Inks The printing i
Page 43 and 44: Robocasting has lacked a well-desig
Page 45 and 46: Table 2.2 Example polymers that dep
Page 47 and 48: 2.6. Sintering In robocasting, sint
Page 49 and 50: Figure 2.15 Sphere and plate model
Page 51 and 52: where
Page 53 and 54: 2.5.3 Solid State Sintering In this
Page 55 and 56: Figure 2.18 Illustration of neck gr
Page 57 and 58: 2.5.3.4 Final Stage During this sta
Page 59 and 60: Figure 2.23 Schematic diagram of th
Page 61 and 62: 2.5.4.2 Rearrangement With the form
Page 63: 2.5.4.6 Spreading of Sintering Aid
Page 67 and 68: 2.5.5 Sintering Atmosphere Sinterin
Page 69 and 70: 2.7. Composite Materials In this re
Page 71 and 72: Figure 2.29 Types of composite mate
Page 73 and 74: Table 2.6 Examples of composite mat
Page 75 and 76: Table 2.7 Examples of FGM applicati
Page 77 and 78: 2.7.3 Processing For the fabricatio
Page 79 and 80: prepared discrete layers of uniform
Page 81 and 82: Powder densification processes gene
Page 83 and 84: The specific volume fraction beyond
Page 85 and 86: a) b) Figure 2.34 a) Volume fractio
Page 87 and 88: When the powders are densified in s
Page 89 and 90: Various FGM coating processes are a
Page 91 and 92: of FGMs, such as partially reactive
Page 93 and 94: leading to a characteristic time τ
Page 95 and 96: 3.1 Introduction CHAPTER 3 AQUEOUS
Page 97 and 98: occurs in a multi-step process: fir
Page 99 and 100: a) b) Figure 3.1 a) SEM image of as
Page 101 and 102: 3.2.3 Preparation of Carbon Black C
Page 103 and 104: 3.2.5 Drying Shrinkage Characteriza
Page 105 and 106: the optimized surfactant concentrat
Page 107 and 108: The storage modulus of a colloidal
Page 109 and 110: For HA ink, yield stress
Page 111 and 112: In the case of the aqueous carbon b
Page 113 and 114: PPO units of Pluronic F-127 may ads
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a) b) Figure 3.6 A carbon black lat
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a) b) Figure 3.7 SEM images of a) c
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TGA plot is in agreement with previ
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a) b) Figure 3.9 Thermogravimetric
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3.3.8 Fabrication of Complex Cerami
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c) d) 109
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3.4 Conclusion A fugitive support m
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metal inks have been reported for R
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Midland, MI) 5% by weight stock sol
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4.2.5. Thermal Degradation of Binde
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4.3. Results and Discussion 4.3.1.
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4.3.2. Preparation of Nickel Ink Su
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260 °C for 8 hours, the residual c
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Table 4.1 Calculated residual carbo
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a) b) Figure 4.6 Sintered Ni struct
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temperature 138, 139 lead to 92-95%
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Figure 4.8 Scanning electron microg
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c) Figure 4.9 Sintered nickel latti
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5.1. Introduction CHAPTER 5 BARIUM
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materials within the overall struct
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40:60, 60:40, 80:20 are separately
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5.2.3. Rheological Characterization
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5.2.5. Co-sintering and Re-oxidatio
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mixing, BT and Ni phases appear uni
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The combined use of PAA and PAA-90K
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To quantify this difference in sint
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As the BT and Ni particles used in
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The reducing atmosphere used in the
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Figure 5.7 Vickers hardness number
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5.3.6. Fabrication of BT-Ni composi
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modify the sintering kinetics of th
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a) b) Figure 5.10 Co-sintered compo
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5.4. Conclusions Freeform fabricati
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Liquid phase sintering involves usi
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(pH=4.4, 31.5% by weight) (Adva Flo
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concentration of 7 mg/mL in the aqu
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Table 6.1 Formulations of aqueous c
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thickness. Each layer of the struct
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6.2.6. Hardness Test Microindentati
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micrographs for these two powders.
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Second, the added LiAC∙2H2O is am
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Figure 6.3 Oscillatory behavior for
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a) b) Figure 6.4 Sintering strain c
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mass transport in LFBT network. 167
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The above discussion is mainly focu
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Figure 6.8 shows the bowtie-shaped
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Figure 6.10 A NPR composite of para
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etween BT and Ni phases. But Zn ele
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Figure 6.13 Scanning electron micro
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Figure 6.15 shows the mapping of Ti
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Figure 6.17 and Figure 6.18 show el
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Figure 6.19 shows element mapping f
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6.3.7. Piezoelectricity and Dielect
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6.4. Conclusions Aqueous colloidal
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geometric features, including non-s
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3. Development of aqueous colloidal
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7.2. Recommendations In the context
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gelation behavior. κ-carrageenan i
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REFERENCES 1. Larsson 9301647, 1993
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29. Simchi, A.; Petzoldt, F.; Pohl,
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61. Bouvard, D., Acta Metallurgica
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92. Morissette, S. L.; Lewis, J. A.
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120. Boehm, H. P., Some Aspects of
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150. Atkinson, A., Growth of Nio an
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APPENDICES A. Mathematical Modeling
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and
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conditions: Equation A.12 is solved
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and with
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a) b) Figure B.1 a) Freeze-dried st
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a) Figure C.1 Cr-Ni lattices of 5Cr
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E. Binary Phase Diagram of ZnO-B2O3
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References A.1. Du, Z., Sarofim, A.
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Name: Jian Xu Date of Degree: May,
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