Accession Number : AD1049062


Title :   Thermal Property Engineering: Exploiting the Properties of Ceramic Nanocomposites


Descriptive Note : Technical Report,01 Jan 2015,31 Dec 2017


Corporate Author : US Army Research Laboratory Aberdeen Proving Ground United States


Personal Author(s) : Fleischman, Zackery ; Blair,Victoria ; Ku,Nicholas ; Merkle,Larry ; Moorehead,Carli ; Fry,Aubrey ; Kilczewski,Steven ; Harris,Donovan ; Pavlacka,Robert


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1049062.pdf


Report Date : 01 Mar 2018


Pagination or Media Count : 40


Abstract : We developed dual-phase ceramic nanocomposites, as opposed to single-phase ceramics, as a potential laser gain material that could incorporate the low-maximum phonon energy necessary for efficient mid-infrared laser output with the high thermal conductivity needed for effective thermal management at high operating powers. Our materials were comprised of an undoped majority species (magnesium oxide) and a rare-earth doped minority species (erbium doped yttrium oxide). Nanocomposite powders were prepared using a novel co-precipitation method that allows for intimate mixing of the constituent species. The results of physical and optical characterization of the powders guided the synthesis parameters of subsequent batches toward optimal material conditions as defined by desired laser performance. Resultant powders went through various methods of densification followed by characterization to steer the parameters toward translucency.


Descriptors :   thermal properties , ceramic materials , nanocomposites , lasers , oxides , xray diffraction , Scanning Electron Microscopes , Density , Transmission Electron Microscopy , Fluorescence , powders , sintering


Subject Categories : Thermodynamics
      Ceramics, Refractories and Glass
      Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE