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The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina

Alumina particles with different shapes, such as sphere, rod, and disk, were examined for the sintering behavior and compressive strength of partially sintered porous alumina. While both the spherical and disk-like particles were packed well to the relative density of 61.2–62.3%, the packing density...

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Autores principales: Miyake, Kimiya, Hirata, Yoshihiro, Shimonosono, Taro, Sameshima, Soichiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073734/
https://www.ncbi.nlm.nih.gov/pubmed/29973547
http://dx.doi.org/10.3390/ma11071137
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author Miyake, Kimiya
Hirata, Yoshihiro
Shimonosono, Taro
Sameshima, Soichiro
author_facet Miyake, Kimiya
Hirata, Yoshihiro
Shimonosono, Taro
Sameshima, Soichiro
author_sort Miyake, Kimiya
collection PubMed
description Alumina particles with different shapes, such as sphere, rod, and disk, were examined for the sintering behavior and compressive strength of partially sintered porous alumina. While both the spherical and disk-like particles were packed well to the relative density of 61.2–62.3%, the packing density of rod-like particles was only 33.5%. The sintering rate of alumina particles increased in the order of disk < rod < sphere. The compressive strength of sintered porous alumina was higher for the spherical particles than for the rod-like and disk-like particles. The uniform distribution of the applied load over many developed grain boundaries contributed to the increase in the compressive strength for the spherical particles. The applied load concentrated on a few grain boundaries of rod-like or disk-like particles, caused fracture at a low compressive stress.
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spelling pubmed-60737342018-08-13 The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina Miyake, Kimiya Hirata, Yoshihiro Shimonosono, Taro Sameshima, Soichiro Materials (Basel) Article Alumina particles with different shapes, such as sphere, rod, and disk, were examined for the sintering behavior and compressive strength of partially sintered porous alumina. While both the spherical and disk-like particles were packed well to the relative density of 61.2–62.3%, the packing density of rod-like particles was only 33.5%. The sintering rate of alumina particles increased in the order of disk < rod < sphere. The compressive strength of sintered porous alumina was higher for the spherical particles than for the rod-like and disk-like particles. The uniform distribution of the applied load over many developed grain boundaries contributed to the increase in the compressive strength for the spherical particles. The applied load concentrated on a few grain boundaries of rod-like or disk-like particles, caused fracture at a low compressive stress. MDPI 2018-07-04 /pmc/articles/PMC6073734/ /pubmed/29973547 http://dx.doi.org/10.3390/ma11071137 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Miyake, Kimiya
Hirata, Yoshihiro
Shimonosono, Taro
Sameshima, Soichiro
The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina
title The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina
title_full The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina
title_fullStr The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina
title_full_unstemmed The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina
title_short The Effect of Particle Shape on Sintering Behavior and Compressive Strength of Porous Alumina
title_sort effect of particle shape on sintering behavior and compressive strength of porous alumina
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073734/
https://www.ncbi.nlm.nih.gov/pubmed/29973547
http://dx.doi.org/10.3390/ma11071137
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