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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Metal-Matrix Composites: Advances in Analysis, Measurement and Observations
Presentation Title In situ Atomic Study of Spontaneous Nanocrystallization of Intermetallic for Interconnection of High-Power and Flexible Electronics
Author(s) Ying Zhong, Chunqing Wang, Sungho Jin
On-Site Speaker (Planned) Ying Zhong
Abstract Scope A new phase-transformation-induced path to spontaneous formation of extreme nanograin structure is reported. In-situ-heating-mode-microscopy exhibited a substantial grain-growth of Cu6Sn5. During cooling, the grain-growth continued, but it spontaneously switched to grain-refinement mode on phase transformation through ~180 C from η-Cu6Sn5 to η’-Cu6Sn5, ending up with an extremely small nanograin size of ~2.5 nm. The cooling cycling always restores the nanograin size regardless of thermal exposure history, making this to be the first demonstration to stabilize the nanograin with its own spontaneous behavior. The Young’s Modulus was significantly reduced by ~3, and the elongation was remarkably increased by ~8 to ~9%. Nano-Cu6Sn5 interconnection can be obtained at lower temperature than the working temperature, preventing the damage of the flexible substrates and supporting high-power electronics. This work will also inspire other researchers to create many additional sub-4 nm type nanocrystalline intermetallicsand more interesting functions which were difficult to gain before.
Proceedings Inclusion? Planned:
Keywords Joining, Characterization, Phase Transformations

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

2D interlayer enabled electrical ductility for flexible electronics
A Brief Review on the Potential of MAX and MAB Phases and Their Derivatives based Composites from a Microstructural Perspective
A Comparative Study on the Effect of Graphene and Multi-walled Carbon Nanotubes used as Interlayers on Resistance Spot Welded Joints of a Carbon Steel
A Method for Measuring Total Protium and Total Deuterium in a Gas Mixture Containing Hydrogen, Deuterium and Hydrogen Deuterium Mixture Using Gas Chromatography
A Study Aimed at Understanding the Use of Nanomaterial-Treated Filters for the Uptake of Heavy Metals from Water Sources
Correlation of Fine Scale Microstructure and Mechanical Properties of Copper-Alumina Nanocomposites
Development of Ultra-High Conductivity Metal Composites
Effect of Heat Treatment on the Mechanical Properties of an Aluminum Alloy and Aluminum Alloy Composite: A Comparative Study
Electrochemical behavior for ZnCo-Carbon nanotube and ZnCo-graphene oxide composite coatings
Influence of Sintering on the Development of Alumina Toughened Nanocomposites: Conventional Versus Microwave
Influence of Tungsten Nanoparticles on Enhancing the Aging Behavior of a Copper-chromium Alloy
Iron Oxide - Gold Composite Nanoparticles and Nanogap Junctions for Sensing Applications Using Surface Enhanced Raman Scattering
Kinetics and Thermodynamics of Metal Cluster Nucleation over Graphene Oxide
Micro-structure and properties of Cu-10Ag in-situ filamentary composite
Microstructure Evolution of Al/Ca Metal-Matrix Composite Conductor Wires by Thermal Aging
Recent Advances in Analysis, Measurement and Properties of Composite Metal Foams
Strengthening Effects of Multi-walled Carbon Nanotubes and Graphene Nanoplatelets Reinforced in Nickel Matrix Nanocomposites
The Effect of Titanium Carbide and Spark Plasma Sintering Processing on Nickel-Titanium Carbide Composites
The Mechanical Performance of an In Situ Processed Nickel-Titanium-Graphite Metal Matrix Composites: Influence of Processing
The Tribological Behavior of an In-situ Processed Magnesium Alloy Based Metal Matrix Composite
Understanding the Mechanical Response of Friction Stir Welded In-situ Processed Aluminum Alloy Metal Matrix Composite: Experimental and Statistical Modelling Approaches
Use of an Infrared Spectroscopic Method for Isotopic Analysis of Gaseous Uranium Hexafluoride
In situ Atomic Study of Spontaneous Nanocrystallization of Intermetallic for Interconnection of High-Power and Flexible Electronics

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