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Related Concept Videos

Plasticity00:58

Plasticity

Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
Plastic Behavior01:21

Plastic Behavior

A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and reloaded.
Superplasticizers01:30

Superplasticizers

Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...

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Related Experiment Video

Updated: May 8, 2026

Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)
08:29

Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)

Published on: January 7, 2019

A high-strain-rate superplastic ceramic.

B N Kim1, K Hiraga, K Morita

  • 1National Institute for Materials Science, Sengen, Tsukuba, Ibaraki, Japan. KIM.Byung-Nam@nims.go.jp

Nature
|September 21, 2001
PubMed
Summary
This summary is machine-generated.

This study demonstrates high-strain-rate superplasticity in a novel ceramic composite, enabling significant plastic deformation at rapid rates. This breakthrough opens possibilities for advanced ceramic shape-forming technologies.

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Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Mechanical Engineering

Background:

  • High-strain-rate superplasticity is crucial for engineering material shape-forming but is limited in ceramics.
  • Existing ceramic superplasticity is restricted to low strain rates (10⁻⁵ to 10⁻⁴ s⁻¹) and prone to premature failure due to cavities.
  • Aluminum and magnesium alloys exhibit high-strain-rate superplasticity, unlike most oxides and nitrides.

Purpose of the Study:

  • To investigate superplasticity in a novel ceramic composite at high strain rates.
  • To overcome the limitations of low strain rate superplasticity and intergranular cavitation in traditional ceramics.
  • To explore the potential for advanced shape-forming technologies in ceramic materials.

Main Methods:

  • Fabrication of a composite ceramic material comprising tetragonal zirconium oxide, magnesium aluminate spinel, and alpha-alumina phases.
  • Testing of the composite's superplastic deformation capabilities at strain rates up to 1 s⁻¹.
  • Microstructural analysis of the deformed material to understand the underlying deformation mechanisms.

Main Results:

  • The ceramic composite exhibited superplasticity at strain rates as high as 1 s⁻¹.
  • A large tensile elongation exceeding 1,050% was achieved at a strain rate of 0.4 s⁻¹.
  • Superplasticity was attributed to limited grain growth and dislocation-induced plasticity in the zirconium oxide phase.

Conclusions:

  • The developed ceramic composite overcomes previous limitations, achieving high-strain-rate superplasticity.
  • The findings suggest a viable pathway for applying shape-forming technologies to ceramic materials.
  • This research holds significant promise for the future of advanced ceramic manufacturing.