|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Thermal Property Characterization, Modeling, and Theory in Extreme Environments
||Phase-dictated thermal conductivity response in carbon systems exposed to ion irradiation
||Ethan Adam Scott, Khalid Hattar, Jeffrey Braun, Sean King, Mark Goorsky, Patrick Hopkins
|On-Site Speaker (Planned)
||Ethan Adam Scott
Doping through ion implantation has long been used to tailor the band structure and electronic properties of materials used in device applications. However, this process introduces defects into the material lattice which act as scattering sites for phonons, thereby reducing the thermal conductivity. Furthermore, nuances of the implantation process and characteristics of the ion species and target have a significant impact upon the thermal response of the implanted material. We demonstrate this in two CVD-based variants of carbon, polycrystalline diamond and diamond-like amorphous carbon. While heavy implantation of a crystalline target yields amorphization and a corresponding reduction in thermal conductivity, in the other extreme, implantation of the amorphous phase can produce a densification, thereby increasing the thermal conductivity. In this presentation, we highlight the application of thermoreflectance-based characterization techniques for deeper insight into the thermal response, and contrast the disparate responses of this material between crystalline phases.