Fabrication and Characterization of Novel Refractory Coatings Using Combinatorial Nanocalorimetry

Abstract

The main goal of this project was to investigate by means of nanocalorimetry both the synthesis of diboride-based coatings using reactive multilayers and their oxidation behavior. At the onset of the project, a scanning AC nanocalorimetry technique was developed to make nanocalorimetry measurements possible at the elevated temperatures required for the project. This novel technique enables nanocalorimetry measurements over a wide range of temperatures and scanning rates not accessible to other calorimetry techniques. The dynamic range of the technique makes it ideal for analyzing the thermodynamics and kinetics of phase transformations, solid-gas reactions, and solid- state reactions in thin-film samples. The report summarizes the results of solid-state reaction in Zr/B and Zr/B4C multilayers, oxidation of ZrB2, the effect of Nb and C doping on the oxidation of ZrB2, and tensile experiments on ZrB2 thin films.

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Document Details

Document Type
Technical Report
Publication Date
Jul 21, 2015
Accession Number
ADA623528

Entities

People

  • Joost J Vlassak

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemical Reactions
  • Chemistry
  • Crystal Structure
  • Heat Energy
  • Heat Transfer
  • Latent Heat
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Phase Transformations
  • Stress Strain Relations
  • Thermodynamics

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Space/Atmospheric Physics.
  • Surface Engineering/Surface Coating Technology.