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Meeting Materials Science & Technology 2019
Symposium Sintering and Related Powder Processing Science and Technologies
Presentation Title 3D Multiscale-imaging of Processing-induced Defects Formed during Sintering of Alumina
Author(s) Gaku Okuma, Shuhei Watanabe, Kan Shinobe, Norimasa Nishiyama, Fumihiro Wakai, Akihisa Takeuchi, Kentaro Uesugi, Satoshi Tanaka
On-Site Speaker (Planned) Gaku Okuma
Abstract Scope The characterization of the processing-induced defects is an essential step for developing defect-free processing, which is important to the assurance of structural reliability of brittle ceramics. The multiscale X-ray computed tomography, consisting of micro-CT as a wide-field and low-resolution system and nano-CT as a narrow-field and high-resolution system, is suitable for observing crack-like defects with small length and with very small crack opening displacement. Here we applied this powerful imaging tool in order to reveal the complicated three-dimensional morphology of defects evolved during sintering of alumina. The hierarchical packing structure of granules was the origin of several types of strength-limiting defects, which could not be eliminated due to the constrained sintering of heterogeneous microstructures. This imaging technique of internal defects provides a link between the processing and the fracture strength for the development of structural materials.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Multiscale-imaging of Processing-induced Defects Formed during Sintering of Alumina
A Novel Approach to Boriding of TZM by Spark Plasma Sintering Method
Analysis of SPS Parameters and Resultant Electrical Response of SPS Sintered Specimens
Characterization of Functionally Graded Rods with High Strength, Good Wear Resistance and Ductility of Titanium Matrix Composites Prepared by Spark Plasma Extrusion
Cold Sintering of Ceramic Materials, Devices and Novel Nanocomposites
Controlling Factors in Flash Sintering of Ceramics
Development of Tungsten Based Plates by Spark Plasma Sintering
Electrochemically-Driven Abnormal Grain Growth of Ionic Ceramics
Glass Sealing of Solid Oxide Fuel Cells (SOFC)
In-situ Monitoring of Interfaces Being Formed as a Functon of Pressure, Temperature and Composition
In-situ Observation of the Internal Structure of an Alumina Green Body during Sintering by Optical Coherence Tomography
Influence of Grain Size on the Entropic Transformation in High Entropy Oxides
Investigation the Effect of CNT and GNP Additions on Densification, Microstructure and Mechanical Properties of B4C Prepared by Spark Plasma Sintering
Kinetics and Densification Behavior during Reaction Sintering of Bulk Titanium Boride (TiB) Nanoceramics by Spark Plasma Sintering (SPS)
Microstructural Control during Sintering of WC-Co
Microstructural Observation and Mechanical Properties of B4C Based Composites Reinforced with CrCoFeMoNi High Entropy Alloy Prepared by Spark Plasma Sintering
Neck Growth in Sintering of Silver Nanowires
P2-107: Influence of Spark Plasma Sintering Processing Parameters and Field Effects on the Microstructure and Mechanical Properties of Advanced Materials
P2-71: Field-induced Mass Transport Phenomena in Flash Sintered High Temperature Ceramics Explored by TEM and In situ SEM
P2-72: Formation Mechanism of Porosity in P-type Bi0.5Sb1.5Te3 Materials and its Influence on Thermoelectric Transport Properties
P2-73: Investigation of Mechanical Properties of CoCrFeMnNi High Entropy Alloys Fabricated by Rapid Solidification Process
P2-74: Study on the Effect of Cu Dispersion on the Thermoelectric Properties of Bi-Sb-Te Alloy
P2-75: Synthesis and Chemical Lixiviation of Nanostructured Calcium-doped Magnesium Aluminate Spinel
Production and Characterization of AlON Ceramics with Different Amount of MgO Addition via Reactive Spark Plasma Sintering
Production and Characterization of B4C- ZrB2 Composites via Spark Plasma Sintering Method
Reactive Sintering and Templated Grain Growth of CuO-doped PIN-PMN-PT Ceramics
Room Temperature Plasticity in Flash-sintered TiO2
Simulation of Densification of Contacting Particles using a Two-dimensional Monte Carlo Model for Solid State Sintering
Simultaneous Multiple Complex Net Shape Components Production by 3D Printing and Spark-Plasma Sintering
Sintering Behavior and Ionic Conductivity of Li1.5Al0.5Ti1.5(PO4)3 Synthesized with Different Precursors
Spark Plasma Sintered Aluminum Oxide Filter for Hot Gas Applications
Spark Plasma Sintering of Soft Magnetic Materials
Spark Plasma Sintering of Titanium Diboride Ceramics with Different Amount of Titanium Addition
Staged Microstructural Study of Flash Sintered Titania
Stochastic Modeling of the Effect of Structural Randomness on the Mechanical Behaviors of 3D Printed Metallic Powders
Surface and Grain Boundary Segregation during Nanopowders Preparation and Sintering
The Role of Grain Boundaries in Nanoscale Sintering: Atomistic and Mesoscale Modeling Studies
Visualization of Sintering in Particle-Based Ink Printed Ni Scaffolds via In Situ X-Ray Tomography

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