Shape distortion in sintering results from nonhomogeneous temperature activating a long-range mass transport.

ABSTRACT: Sintering theory predicts no long-range mass transport or distortion for uniformly heated particles during particle coalescence. However, in sintering-based manufacturing processes, permanent part distortion is often observed. The driving forces and mechanisms leading to this phenomenon are not understood, and efforts to reduce distortion are largely limited to a trial-and-error approach. In this paper, we demonstrate that distortion during sintering results from mass-transport driven by nonhomogeneous temperature distribution. We then show that hitherto unknown mass transport mechanisms, working in the direction opposite to temperature gradient are the likely cause of distortion. The experimental setup, designed for this purpose, enables the quantification of distortion during sintering.

SUBMITTER: Ritchie SM 

PROVIDER: S-EPMC10169797 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature