High temperature mechanical properties of a multilayer Y-TZP processed by superplastic flow

Journal Article · Fri Jun 05 04:00:00 EDT 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00115-8· OSTI ID:642134

Dominguez-Rodriguez, A; Jimenez-Pique, E; Jimenez-Melendo, M ^[1]

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1. Univ. de Sevilla (Spain). Dept. de Fisica Materia Condensada

In a previous paper the authors have described a novel technique to join fine grained ceramics, which takes advantage of the grain boundary sliding as the microscopic mechanism of the superplasticity and of the fact that the creep resistance increases with the grain size. Superplasticity is grain-size dependent, {dot {epsilon}} {approx} (1/d{sup p}), with p between 1 and 3 depending on the rate controlling process. The authors have used these two concepts as a new technique to join layers of 3% mol Y-TZP with four different grain sizes, in order to have the same thermal expansion coefficient avoiding deformation of cavities and microcracks in the interface and so to obtain a functional gradient material (FGM) with anisotropic high temperature mechanical properties.

• OSTI ID: 642134
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 1 Vol. 39; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
GRAIN SIZE
INTERFACES
LAYERS
MECHANICAL PROPERTIES
PLASTICITY
YTTRIUM OXIDES
ZIRCONIUM OXIDES