ProgramMaster Logo
Conference Tools for MS&T21: Materials Science & Technology
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting MS&T21: Materials Science & Technology
Symposium Phonon Properties of Materials: Modeling and Experimentation
Presentation Title Tailoring Thermal Transport in Insulators Using Energetic Ions
Author(s) Vinay Chauhan, Joshua Ferrigno, Saqeeb Adnan, Zhandos Utegulov, Cody Dennett, Amey Khanolkar, Zilong Hua, Lingfeng He, David Hurley, Marat Khafizov
On-Site Speaker (Planned) Marat Khafizov
Abstract Scope Ion implantation and nuclear transmutation are established methods for tailoring electronic properties of semiconductors. In this presentation, we discuss use of ion beam modification to change phonon mediated thermal transport characteristics of insulating materials. Modulated thermorefleactance methods are used to measure conductivity of the modified regions, whereas transmission electron microscopy is employed to characterize microstructure. Implantation of xenon swift heavy ions accelerated to several tens of MeV into sapphire introduced an aligned array of ion tracks. These aligned nano-channels induce thermal anisotropy within the ion impacted region, which is attributed to directional scattering of phonons with ion tracks and phonon confinement effects. Irradiations of fluorite oxides such cerium and thorium dioxide with few MeV protons at elevated temperatures resulted in formation of dislocation loops. Careful analysis of thermal conductivity reduction under these implantation conditions suggests a very strong phonon scattering by the faulted loops owing to their long-range strain field.


Experimental and Computational Thermal Conductivity Reduction in Single Crystal Thorium Dioxide from Lattice Defects
High-temperature Heat Transport in Anharmonic Systems at the Nanoscale
Phonons and Twisting Symmetries in Non-symmorphic Materials
Tailoring Thermal Transport in Insulators Using Energetic Ions
Transfer Learning for Phonon and Thermal Property Predictions
Understanding Ionic Conduction Mechanisms in Glassy Electrolytes Using MD Vibrational Analysis

Questions about ProgramMaster? Contact