CHEMICAL DYNAMICS AND PHASE TRANSFORMATION IN HIGH TEMPERATURE PROCESSES USING TIME RESOLVED AND SPATIALLY RESOLVED X-RAY DIFFRACTION

The following sections are included:

• Introduction

• Experimental Methods

  • Time Resolved Diffraction Measurements

  • Preparation of Combustion Synthesis Specimens

  • Temperature Profile Measurements

  • Spatially Resolved X-ray Diffraction (SRXRD) Measurements

  • Titanium Samples for Welding

  • Welding Setup and Procedure

• Results

  • Time Resolved Diffraction Data

    • The Synthesis of TaC

    • The Synthesis of Ta₂C

    • Temperature Profiles of the Combustion Front

  • Spatially Resolved X-ray Diffraction Data

    • Phase Mapping in the HAZ of Ti Fusion Welds

    • The α Pattern

    • The α_AR Pattern

    • The α_RG Pattern

    • The α_BT Pattern

    • The β Pattern

• Discussion

  • Combustion Reaction Temperature

  • Chemical Dynamics of the Ta-C Combustion Synthesis

  • Thermal Distribution in a Ti Fusion Weld

  • The α_AR Pattern: Location and Associated Microstructure

  • The α_RG Pattern: Location and Associated Microstructure

  • The β and β_L Pattern: Location and Associated Microstructure

  • The α_BT Pattern: Location and Associated Microstructure

• Concluding Remarks

• Acknowledgments

• References