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About this Abstract
Meeting 2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
Symposium 2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
Presentation Title Control of Selective Laser Flash Sintering of Ceramics Using an AC Electric Field
Author(s) David Khanan, Desiderio Kovar, Joseph J. Beaman
On-Site Speaker (Planned) David Khanan
Abstract Scope Selective laser flash sintering (SLFS) combines aspects of both selective laser sintering and flash sintering to additively manufacture ceramic parts with complex geometries and quicker post-processing times as pyrolysis is not needed. The SLFS process utilizes a scanning laser to locally heat selected regions on the surface of a pressed powder bed while an AC electric field is applied across the build surface. The onset of Joule heating produced by flash sintering further heats the powder particles and allows them to bond at the contact points, but excessive heating results in cracking. Thus, control of temperature is essential for producing high quality parts. The system utilizes a bore-sighted photodiode to obtain real-time temperature measurements during laser scanning and the electric field is varied to limit thermal runaway. Passive and active control of the AC electric field were studied to maintain thermal control of the system while varying process parameters.
Proceedings Inclusion? Planned: Post-meeting proceedings

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Physics-Aware AI for Born-Qualified Additive Manufacturing: Toward Real-Time, In-Situ Part Qualification
Physics-Guided Thermal History Control to Improve Part Quality in Laser Powder Bed Fusion Additive Manufacturing
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Pore Behavior in Melt Pool Properties Based on Ti-6Al-4V and SS316L Powders in Directed Energy Deposition (DED) Processes
Porosity Reduction in Large-Format Additive Manufacturing of Fiber-Reinforced Composites via Elongational Screw Design
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Real-Time Closed-Loop Control for Precision Liquid Metal Jetting
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Robotic Subscale Bar-Fed Friction Stir Additive Manufacturing
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Thermal Exposure Optimization for Enhanced Interlayer Strength in FFF-Printed ABS: A DOE and Microstructural Investigation
Thermal History Prediction of More Complex Geometries for DED Based on SciML
Thermal Monitoring in AC Selective Laser Flash Sintering of Ceramics Using a Mid-Wave Infrared Photodiode
Toolpath Planning for Multi-Nozzle Concurrent Molten Metal Jetting Process
Top Layer Quality Assurance of Complex Geometries Based on Region of Interest in Additive Manufacturing
Topology and Orientation Optimized-Inspired Toolpath Planning for Continuous Fiber Material Extrusion
Toward Real-Time Finite Element Analysis-Informed Feedback Control of Wire-Arc Directed Energy Deposition via Robot Operating System 2 In-Situ Monitoring System
Towards Parametric Design for Additive Manufacturing of Coral Structures Using a Digital Twin Approach
Towards Scalable and Energy-Efficient Extrusion Additive Manufacturing of Thermoplastic Polymer Composites
Towards the Production of a 3D Part in Selective Laser Additive Manufacturing Acousto-Optic Light Engine (SLAM – ALE)
Train Small, Predict Big: Scalable Thermal Surrogate Modeling for LPBF Using MODAL
Transfer Learning for Process–Microstructure–Property Mapping in Micro Selective Laser Sintering
Transient Liquid Phase Surface Smoothing
Tribo-Mechanical and Corrosion Characteristics of SS316L-IN625 Alloys of Varying Compositions Fabricated by Twin Wire WAAM-TIG
Two-Component Thermoset Polymer Formwork for Concrete Casting
Uncovering Process-Structure Relationships in Directed Energy Deposition of Nickel-Based Alloys on Low-Alloy Steel with Post-Deposition Heat Treatment
Understanding Hardening Behavior Induced by Interlayer Shot Peening in Laser Powder Bed Fusion of 316L Stainless Steel
Understanding Multi-Line Printing and the Effects of Controlled Prewetting on Binder Jetting Print Cohesion
Understanding Sources of Spatial Density Variation in Green Parts Produced by Binder Jetting
Understanding the Effect of Heat Treatment on Mechanical Properties of Additive Manufactured 1.2709 Grade Maraging Steel
Understanding the Feasibility of Using NiTi55 Interlayer for Ti6Al4V-18Ni Maraging Steel Multi-Metal Deposition in L-PBF
Use of In-Situ Thermography to Study Scan Strategy for Laser Foil Printing of Metallic Glass
Using Acoustic Signals For Torch-to-Bead Distance Estimation and Closed-Loop Control in Wire Arc Additive Manufacturing
Using Coaxial Melt Pool Images to Construct In-Process 3D Volume Model in Powder Bed Fusion Additive Manufacturing
Using Machine Learning-Based Process Map to Guide Evaluation of Inconel 625 Mechanical Properties in Laser Foil Printing
Vat Photopolymerization of Na3V2(PO4)3-Based Electrodes for Sodium-Ion Batteries
Vat Photopolymerization of Ultra-Soft Polymer Foams
Volumetric Medical Models: Direct Imaging to Functional 3D Prints
Wire Arc Additive Manufacturing Benefits and Challenges: A Survey
Wire Arc Additive Manufacturing Development for Aluminum 6061 RAM
Wire Arc Additive Manufacturing of a Large Scale, High Aspect Ratio, Multi-Material Part
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