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Meeting Materials Science & Technology 2020
Symposium Sintering and Related Powder Processing Science and Technologies
Presentation Title On the Bending of High-aspect Ratio Freestanding Aerosol Jet Printed Micropillar Arrays during Thermal Sintering
Author(s) Sandra Ritchie, Sasa Kovacevic, Prithviraj Deshmukh, Mohammad Sadeq Saleh, Sinisa Mesarovic, Rahul Panat
On-Site Speaker (Planned) Sandra Ritchie
Abstract Scope High-aspect ratio free-standing micropillars have several technologically important applications such as neural probes, biosensors, and microelectronics. Freestanding micropillars with aspect ratios of 20:1 have been previously fabricated by our group. Increasing pillar length and aspect ratios to 60:1 has thus far been limited by the warping, which occurs during the post-printing thermal sintering of the nanoparticles. As such, it has become necessary to increase our understanding of the fundamental mechanisms of nanoparticle sintering and to develop effective control parameters to prevent or minimize warping. The use of optical and thermal in-situ imaging has allowed for the discovery and study of coordinated motion found in arrays of pillars. This motion results from temperature gradients present during sintering, which can cause differential sintering rates, hence the distortion. Based on these findings, successful engineering solutions have been developed which allows repeatable fabrication of long, straight pillars with aspect ratios as high as 60:1.
Proceedings Inclusion? Undecided


Coarsening of Several Ceramic Particle Systems
Electron Microscopy Observation of Electric Field Assisted Sintering of Stainless Steel Nanoparticles
Flash Sintering Solid State Ceramic Electrolytes Using a Novel Multi- electrode Approach
Grain Growth Measurements of Anti-thermal Strontium Titanate with Non-destructive High Energy X-ray Diffraction Microscopy (HEDM)
Novel Low-temperature Copper Sintering Paste for Large-area Die Attachment at 200 ℃ in Nitrogen Atmosphere
On the Bending of High-aspect Ratio Freestanding Aerosol Jet Printed Micropillar Arrays during Thermal Sintering
Reduced Pressure Nanosintering during Environmentally Controlled – Pressure Assisted Sintering
Selective Sintering Technique: Modeling and Experimentation
The Effect of Cryogenic Milling and Parameters of Spark Plasma Sintering on Microstructure, Phase Composition and Mechanical Properties of Metastable Beta Titanium Alloy Ti-15Mo
The Effect of Texturing by Applied Magnetic Field on Grain Growth of Alumina

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