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Gas-loading furnace for deuterium-charged alloy-casting.

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This study presents a novel furnace for controlled gas loading and degassing of alloys. The furnace enables precise control over gas pore generation in solidified samples, optimizing material properties.

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Area of Science:

  • Materials Science
  • Metallurgy
  • Chemical Engineering

Background:

  • Controlled gas porosity in alloys is crucial for tailoring material properties.
  • Existing methods for gas loading and degassing may lack precision and safety.
  • Understanding gas-solid interactions under various conditions is essential for alloy development.

Purpose of the Study:

  • To develop and characterize a furnace for safe and controlled gas loading/degassing of alloys.
  • To investigate the effects of process parameters on gas retention in solidified alloys.
  • To enable the controlled generation of gas pores in metallic materials.

Main Methods:

  • Development and characterization of a specialized furnace.
  • Processing samples under high vacuum, deuterium-nitrogen atmospheres, and pressures up to 800 hPa.
  • Analysis using Thermal Desorption Spectroscopy (TDS), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Diffraction (EDX), and Rutherford Backscattering Spectroscopy (RBS).

Main Results:

  • High gas loading concentration, pressure, temperature (50-150 K above liquidus), and holding times (up to 60 min) enhance retained gas.
  • Absence of copper segregation confirmed by EDX and RBS.
  • Controlled generation of distinct amounts of gas pores, including near-zero porosity, was achieved.

Conclusions:

  • The developed furnace provides safe and controlled gas loading/degassing capabilities.
  • Process parameters significantly influence the amount of retained gas and pore formation.
  • The facility allows for precise control over gas porosity in solidified alloys, impacting material performance.