sciencedirect: Flash sintering of complex shapes

Applied Materials Today
Volume 26, March 2022, 101293

Flash sintering of complex shapes

Charles Manière a b 1 2, Geuntak Lee a 1, Eugene A. Olevsky a 1

a    Powder Technology Laboratory, San Diego State University, San Diego, United States of America

b    Normandie Univ, ENSICAEN, UNICAEN, CNRS, CRISMAT, Caen, France

Received 1 September 2021, Revised 16 November 2021, Accepted 24 November 2021, Available online 7 December 2021, Version of Record 7 December 2021.

 

Highlights

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  Flash spark plasma sintering scalability.
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  Interface method for spark plasma complex shaping.
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  Flash sintering of complex shapes.

Abstract

Flash (ultra-rapid) sintering of powder materials is a Multiphysics phenomenon which has a potential for the quasi-instantaneous fabrication of various components. However, the intrinsic instability of flash sintering makes it difficult to apply to complex shapes and large specimens. Here, we circumvent this problem by the use of an interface-controlled approach to impose stable and very fast heating to large powder samples which become fully dense in a matter of seconds. The Multiphysics simulation demonstrated that an electric-thermal-mechanical confinement of the specimen allows a very efficient (and selective) heating and sintering of the powder specimen with a homogeneous microstructure and a substantial reduction of the grain growth. Our results indicate that the ultra-rapid sintering of large and complex shape samples is possible.

 https://www.sciencedirect.com/science/article/pii/S2352940721003565