Integrated Synthesis and Post-Processing of SiC and AlN.

Abstract

Synthesis of nanocrystalline powders of SiC, A1N, Si Si3N4, TiN, TiC, TiO2 have been achieved by a non thermal microwave plasma reactor from vapor phase precursors. In the case of TiO2 the phase can be a metastable high pressure plasma (Beta-TiO2). Nanoparticles of Si and SiOx displayed strong red-orange photoluminescence. Two mechanisms for photoluminescence were identified one based on 3-D quantum confinement and a second based on natural surface oxides. Creep of fine grained (0.7micrometers) AlN has been studied for the first time. The mechanism was identified as being diffusion-accommodated grain-boundary sliding. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
ADA290853

Entities

People

  • A. I . Kingon
  • Aastha Singh
  • Robert F Davis

Organizations

  • North Carolina State University

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Ceramic Materials
  • Crystal Structure
  • Electron Microscopy
  • Electrons
  • Grain Boundaries
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Nanoparticles
  • Particle Size
  • Particles
  • Silicon Carbide
  • Spectra
  • Spectroscopy
  • Vapor Phases

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thin Film Deposition Science.

Technology Areas

  • Biotechnology
  • Quantum Computing