Heat Transfer of Extremely Deformed Interface Nanomaterials
Abstract
Prof. Baoxing Xu at the University of Virginia is proposing a fundamental and innovative ONRYIP project entitled “Heat Transfer of Extremely Deformed Interface Nanomaterials”. Thermal interface materials (TIMs) that are applied between the heat sources and heat sinks are a crucial ingredient in thermal management to remove excess heat and cool electronic devices. They are commonly subjected to serve mechanical deformation in practical applications by packing pressure, residual and mismatch strain during manufacturing and/or working environments. Understanding the heat transfer of mechanically deformed TIMs is not only fundamentally important to harness heat for existing TIMs in thermal management and subsequently optimize their performance and design, but will also enable to develop novel strategies and approaches of controlling thermal properties suitable for next-generation ultra-scaled and high-power electronics. In this project, we propose to reveal the fundamental mechanisms of heat transfer in graphene-based TIMs subjected to external mechanical loading by using full-scale atomistic simulations and to establish in theory the quantitative relationship between mechanical deformation and thermal properties of mechanically deformed TIMs. Specifically, we will investigate the heat transfer of three typical deformed TIMs, including graphene-based heterostructures with well-defined alignments of each layer component, bulk graphene powders with random distributions of each graphene sheet, and graphene/PDMS polymer composites. We will study how the phonon transport mechanisms of these three TIMs are impacted by their mechanical deformation of in-plane strain and/or out-ofplane pressure. We will also pioneer the atomistic computational framework that allows to apply a local mechanical deformation to these three TIMs and to study the fundamental response of heat transfer across local deformed areas in both parallel and vertical directions. The outcome of the proposed work includes both the elucidation of fundamental heat transfer mechanism of potentially widespread graphene-based TIMs in response to mechanical loading conditions and the quantitative theoretical models correlating heat transfer, mechanical deformation and structures of the TIMs. The proposed work will provide direct guidance for the practical utilization of these TIMs in both Navy’s electric devices and shipboard energy storage systems, and is also expected to aid in the future design and exploration of stable, reliable Naval technology and active module cooling solutions through a mechanical means. Total funding of $510,000 is requested for the performance period from 12/01/2019 - 11/30/2022
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 20, 2020
- Source ID
- N000142012611
Entities
People
- Baoxing Xu
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia