Anisotropic Microstructural Evolution and Coarsening in Free Sintering and Constrained Sintering of Metal Film by Using FIB-SEM Tomography

Okuma, Gaku; Miyaki, Ryo; Shinobe, Kan; Ściążko, Anna; Shimura, Takaaki; Yan, Zhimiao; Hara, Shotaro; Ogashiwa, Toshinori; Shikazono, Naoki; Wakai, Fumihiro

doi:10.2139/ssrn.3797423

Cited by 1 publication

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“…This means that both the particles have a higher contact surface area, but also potentially that the pore network in the packings could be asymmetric, which can lead to anisotropic sintering. 38 To study this, we consider the strain of the packings while sintering. The strain in the 𝑥and 𝑦-direction should be identical as a result of the pouring of the particles, and this has been verified numerically to also be the case.…”

Section: Anisotropic Sinteringmentioning

confidence: 99%

“…As was discussed in the section on the properties of the packings, the spheroidal particles have a preferred orientation in space. This means that both the particles have a higher contact surface area, but also potentially that the pore network in the packings could be asymmetric, which can lead to anisotropic sintering 38 . To study this, we consider the strain of the packings while sintering.…”

Section: Sintering Behaviormentioning

confidence: 99%

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The sintering behavior of ellipsoidal particles

Bjørk

2022

J Am Ceram Soc.

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The sintering behavior of ellipsoidally shaped particles, particularly spheroids, was studied using a numerical kinetic Monte Carlo model for solid-state sintering. Compact packings of spheroids with five different aspect ratios from 0.5 to 2.0, thus comprising oblate, spherical, and prolate particles, were generated by simulating the pouring of such particles into a cubic container. For each spheroid particle aspect ratio, five different packings were generated to provide statistics on the sintering properties. The sintering behavior was quantified by the densification rate, relative density, anisotropic strain, grain size, and grain coordination number, as determined from the kinetic Monte Carlo model. The spherical particles were found to sinter to a relative density of 0.87 before grain growth occurs, whereas the oblate and prolate particles reach a relative density of 0.91 before grain growth sets in, with the prolate particles sintering slightly better compared to oblate particles. The more extreme the particle aspect ratio, the more anisotropic the strain is. Finally, the oblate and prolate spheroids have a slightly higher mean grain coordination number and a slightly higher initial relative density compared to the spherical particles.

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Section: Anisotropic Sinteringmentioning

confidence: 99%

Section: Sintering Behaviormentioning

confidence: 99%