TY - JOUR

T1 - Influence of the Fine Fraction and Sintering on Selected Isotropic and Anisotropic Bulk Properties of Uniaxial Compacts

AU - Fruhstorfer, Jens

AU - Wagner, Moritz

AU - Gruber, Dietmar

AU - Harmuth, Harald

N1 - Publisher Copyright: © 2022, Springer Fachmedien Wiesbaden GmbH.

PY - 2022/9/14

Y1 - 2022/9/14

N2 - This study focuses on the influences of the fine particle fraction and the minimum particle size on the density, the shrinkage, the Young's modulus E, and the anisotropies of shrinkage and E. A lower minimum particle size and a higher fines content improved the particle packing, lubrication and sintering densification resulting in higher densities and E. Presumably due to a lower-density neutral zone after pressing, the anisotropic shrinkage was higher in the pressing direction, improving the density homogeneity. For the Young's modulus, the extent of the anisotropy increased mainly with a higher sintering capability (high fines content). Especially the core as a part of the neutral zone had a lower E. Exemplary density and open porosity distributions revealed that flaws formed in the core, which led to the lower E. The pressure distribution during uniaxial pressing leads to a density distribution and, finally, to a flaw density or flaw size distribution after sintering.

AB - This study focuses on the influences of the fine particle fraction and the minimum particle size on the density, the shrinkage, the Young's modulus E, and the anisotropies of shrinkage and E. A lower minimum particle size and a higher fines content improved the particle packing, lubrication and sintering densification resulting in higher densities and E. Presumably due to a lower-density neutral zone after pressing, the anisotropic shrinkage was higher in the pressing direction, improving the density homogeneity. For the Young's modulus, the extent of the anisotropy increased mainly with a higher sintering capability (high fines content). Especially the core as a part of the neutral zone had a lower E. Exemplary density and open porosity distributions revealed that flaws formed in the core, which led to the lower E. The pressure distribution during uniaxial pressing leads to a density distribution and, finally, to a flaw density or flaw size distribution after sintering.

KW - anisotropy

KW - Keywords: particle size distribution

KW - microcracks

KW - shrinkage

KW - Young's modulus

UR - http://www.scopus.com/inward/record.url?scp=85139625806&partnerID=8YFLogxK

U2 - 10.1007/s42411-022-0482-3

DO - 10.1007/s42411-022-0482-3

M3 - Article

AN - SCOPUS:85139625806

VL - 71.2022

SP - 38

EP - 47

JO - Interceram

JF - Interceram

SN - 0020-5214

IS - September

ER -