Andrey Voevodin
Air Force Research Laboratory
Wright-Patterson Air Force Base

Adaptive interfaces for mechanical, thermal, and electrical applications

Location: EB1 Room 1011

Friday, May 2nd 2014 - 11:30 am

Surfaces and interfaces capable to self-adjust under extremes of environments and operation loads are sought for a number of DoD applications, including aerospace tribological pairs, electrical and thermal interfaces, strain resistant electronic devices, and others. The presentation outlines approaches to this broad spectrum of aerospace application challenges where material science and thin film technology are used to produce multifunctional surfaces with self-guided structural-chemical evolutions. These adaptive surface materials are designed to counteract adverse actions of mechanical strain, temperature changes, humidity cycling, electric fields and current. Many of them are realized using hybrid plasma growth and other thin film technologies developed in Air Force Research Laboratory over recent years. Discussed examples include: i) adaptive ceramic-metal-dichalocogenide nanocomposites for reduced friction and wear in ambient-space and low-high temperature cycling; ii) functionalized metal nanoparticles for self-healing contacts in high-current-density MEMS switches; iii) nanostructured interfaces with high thermal conduction anisotropy and phase changes to mitigate thermal spikes; iv) 2D semiconductor materials for conformal and strain-resilient electronic devices. The presentation highlights surface engineering concepts, nanostructured material synthesis approaches and application examples for adaptive materials designed for mechanical, thermal, electrical loads in aerospace environments.

North Carolina State University