A high-strain-rate superplastic ceramic

B.-N. Kim (), K. Hiraga, K. Morita and Y. Sakka
Additional contact information
B.-N. Kim: National Institute for Materials Science
K. Hiraga: National Institute for Materials Science
K. Morita: National Institute for Materials Science
Y. Sakka: National Institute for Materials Science

Nature, 2001, vol. 413, issue 6853, 288-291

Abstract: Abstract High-strain-rate superplasticity describes the ability of a material to sustain large plastic deformation in tension at high strain rates of the order of 10-2 to 10-1 s-1 and is of great technological interest for the shape-forming of engineering materials. High-strain-rate superplasticity has been observed in aluminium-based1 and magnesium-based2 alloys. But for ceramic materials, superplastic deformation has been restricted to low strain rates of the order of 10-5 to 10-4 s-1 for most oxides3,4 and nitrides5 with the presence of intergranular cavities leading to premature failure. Here we show that a composite ceramic material consisting of tetragonal zirconium oxide, magnesium aluminate spinel and α-alumina phases exhibits superplasticity at strain rates up to 1 s-1. The composite also exhibits a large tensile elongation, exceeding 1,050 per cent for a strain rate of 0.4 s-1. The tensile flow behaviour and deformed microstructure of the material indicate that superplasticity is due to a combination of limited grain growth in the constitutive phases and the intervention of dislocation-induced plasticity in the zirconium oxide phase. We suggest that the present results hold promise for the application of shape-forming technologies to ceramic materials.

Date: 2001
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/35095025 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:413:y:2001:i:6853:d:10.1038_35095025

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/35095025

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().