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A simple flash sintering setup under applied mechanical stress and controlled atmosphere.

L B Caliman1, E Bichaud2, P Soudant2

  • 1Department of Metallurgical and Materials Engineering, Escola Politécnica, Universidade de São Paulo, Av. Prof. Mello Moraes n. 2463, 05508-030 São Paulo, SP, Brazil ; Laboratoire d'Electrochimie et de Physicochimie des Matériaux et des Interfaces (LEPMI) - UMR 5631 CNRS-Université de Grenoble Alpes, BP 75, 38402 St Martin d'Hères, France.

Methodsx
|December 5, 2015
PubMed
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This study introduces a novel flash sintering setup using cylindrical pellets and AC current for uniform material processing. This method allows for complete sample analysis and adaptable experimental conditions, improving microstructure control.

Area of Science:

  • Materials Science
  • Ceramics Processing
  • Solid-State Chemistry

Background:

  • Traditional flash sintering uses dog bone samples and DC current, leading to non-uniform densification.
  • Analysis is often limited to the sample's core due to heterogeneous grain growth.
  • Cylindrical pellets offer advantages in sample conformity and uniformity.

Purpose of the Study:

  • To present a new experimental setup for flash sintering.
  • To enable in situ monitoring and control of microstructure.
  • To overcome limitations of traditional flash sintering techniques.

Main Methods:

  • Utilized a novel experimental setup with atmosphere control and pressure application.
  • Employed cylindrical pellets for uniform sample characteristics.
Keywords:
A simple flash sintering setup under applied mechanical stress and controlled atmosphereAtmosphere controlCurrent assisted sinteringFlash sintering setupMechanical stress application

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  • Performed in situ shrinkage measurements and impedance spectroscopy.
  • Investigated the effects of AC current and variable experimental parameters.

    • Main Results:

    • Demonstrated uniform densification and grain growth in cylindrical pellets.
    • Enabled complete recovery and analysis of the entire sample, including electrode-contact regions.
    • Showcased the adaptability of the setup for various electrolytes and electrode materials.

    Conclusions:

    • The new setup facilitates comprehensive analysis of flash-sintered materials.
    • AC current allows for studying frequency-dependent effects.
    • The system's flexibility supports diverse material research and process optimization.