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Meeting MS&T23: Materials Science & Technology
Symposium Manufacturing and Processing of Advanced Ceramic Materials
Presentation Title Micromechanical Properties and Microstructures of AC and DC Flash-sintered Alumina
Author(s) Chao Shen, Tongjun Niu, Bo Yang, Jaehun Cho, Zhongxia Shang, Tianyi Sun, Anyu Shang, R. Edwin Garcia, Haiyan Wang, Xinghang Zhang
On-Site Speaker (Planned) Chao Shen
Abstract Scope Alumina (α-Al2O3), one of the most widely used structural ceramics for industrial applications, requires high temperature and long sintering time to achieve a fully dense structure through conventional pressureless sintering. Recently, several attempts have been made to reduce the sintering time and temperature of Al2O3 through the application of an electric field with limited success. In this study, alternating current (AC) and direct current (DC) flash sintering techniques were employed to obtain high-density Al2O3 within 10 min. The microindentation measurements reveal that the AC-FS Al2O3 provides the highest fracture toughness and a high hardness among all sintered specimens. The improved mechanical properties of AC-FS Al2O3 are attributed to defects, such as dislocations as well as stacking faults observed in the FS specimens. This study provides a fresh perspective on the low-energy manufacturing of structural ceramics with improved properties.


A Cold Sintering Study of ZnO and Dopants - With a View Towards Varistor Characteristics
Additive Manufacturing of Transparent Optical Ceramics
Basic Research Opportunities from the Army Research Laboratory
Binder Jet Additive Manufacturing for Advanced Ceramics
Ceramic Powder Processing (“Think Like a Particle?” or Perhaps “Think Like a Defect?”)
Densification of Dual Phase High Entropy Boride-Carbide Ceramics by Pressureless Sintering
Design of a Polymer-Metal-Nanoparticle System for Polymer Infiltration and Pyrolysis to Form Ceramic Composites
Design Paradigm for Fabricating MAB Phases
Effect of Binder Phase on TiB2-TiC Based Cermet Materials on the Microstructure and Mechanical Properties
Embedded Printing in Ceramics
Embedded Wire CVD of Silicon Carbide for Homogeneous Joining and SiC-SiC Composite Fabrication
Exploring New Flux Chemistries to Expand the Cold Sintering Process
From Flash Sintering to Ultrafast Sintering without an Electric Field and Electrochemically Controlled Microstructural Evolution
Limitations on the Sintering of Graded Particle Systems
Machine-Learning-Based, Online Estimation of Ceramic’s Microstructure Upon the Laser Spot Brightness During Laser Sintering
Manipulating Instrument Setup Parameters to Increase the Range for Particle Size Measurement
Manufacturing Feasibility of the Cold Sintering Process for Large-scale Ceramic Dielectrics
Measurement of High Temperature Mechanical Property Data for Modeling Applications
Mechanisms of Delamination within Co-extruded Silicon Carbide
Micromechanical Properties and Microstructures of AC and DC Flash-sintered Alumina
Microstructure and Electrical Conductivity of Sol-gel Synthesized and Spark Plasma Sintered Doped-lanthanum Gallate
Nondestructive Materials Characterization Using Ultrasound: Towards a Deeper Understanding of the Cold Sintering Process
Optimizing Ceramic Surfaces for Dust-tolerant Lunar Exploration
Phase and Nanostructure of Polymer Derived Monolithic SiC at Ultrahigh Temperatures
Processing Ceramic Powders in Non-aqueous Mediums - How Polarity of the Suspension Medium Effects Dispersion
Reaction Flash Sintering of Ti0.5Zr0.5N and Ti0.5Al0.5N Ternary Metal Nitrides
Surface Area Reduction During the Sintering of Alumina
Surface Reactivity and Processing Properties of Metal Oxide Nanoparticles for Ceramics
Tailoring Thermal Insulation Ceramic Architectures from Additive Manufacturing
The Influence of Cr on Microstructural Evolution of Alumina
Trends and Opportunities in Manufacturing and Processing of Advanced Ceramic Materials at the National Science Foundation
In Situ Video Monitoring of Zirconium Active Braze Alloy for Joining Al2O3 to Kovar

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