Superplasticity of Yttria-Stabilized Tetragonal ZrO<sub>2</sub>Polycrystals

Wakai, Fumihiro; Sakaguchi, Shuji; Matsuno, Yosoo

doi:10.1111/j.1551-2916.1986.tb00026.x

Cited by 566 publications

(202 citation statements)

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“…In ceramic materials, this ability was first discovered by Wakai et al 1 and this discovery was followed by the demonstrations of superplastic bulging, 2 forging 3 ,4 and joining 5 in zirconiaand alumina-base materials. Industrial applications, however, have still been limited, in contrast to superplastic metallic materials.…”

Section: Introductionmentioning

confidence: 99%

Development of High-Strain-Rate Superplastic Oxide Ceramics

Hiraga

2007

J. Ceram. Soc. Japan

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Section: Introductionmentioning

confidence: 99%

Development of High-Strain-Rate Superplastic Oxide Ceramics

Hiraga

2007

J. Ceram. Soc. Japan

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“…18) Application of superplasticity would allow ceramic components with complex shapes to be produced by plastic processing, similar to metallic materials.…”

Section: )17)mentioning

confidence: 99%

Superplastically foaming method for inclusion of closed pores in fully densified ceramics

Kishimoto

2013

J. Ceram. Soc. Japan

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Porous ceramics incorporate pores to improve material properties, including thermal insulation, while maintaining inherent ceramic properties such as corrosion resistance and high mechanical strength. Conventional porous ceramics are usually fabricated by insufficient sintering that excludes pores; thus, it must be terminated in an early stage to maintain high porosity. The premature termination leads to degraded strength and durability. We developed a superplastic-foaming method to fabricate ceramic foams in the solid state. In this method, the inserted foam agent evaporates after full densification of the matrix at the sintering temperature. Closed pores expand by superplastic deformation driven by the gas pressure. The pores are introduced after sintering the solid polycrystal. Then, only closed pores are introduced, improving the insulation of gas, sound and heat. The pore walls are fully densified for high mechanical strength. Compared to the melt-foaming method, this technique is practical because the fabrication temperature is far below the material's melting point, and it does not require moulds. In addition, the size and location of the pores can be controlled by the amount and position of the foam agent.

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“…Figure 1 shows the first demonstration of super plastic elongation of YTZP. 5) Many efforts had been devoted to improve the superplasticity of ZrO 2 based ceramics in the last decade. 9) For example, a remarkably high elongation of 2,510÷ has been achieved at a highstrain rate.…”

Section: Introductionmentioning

confidence: 99%

セラミックス超塑性の粒界ネットワーク • ダイナミクス

Wakai

2004

J. Ceram. Soc. Japan

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Superplasticity of Yttria-Stabilized Tetragonal ZrO₂Polycrystals

Cited by 566 publications

References 10 publications

Development of High-Strain-Rate Superplastic Oxide Ceramics

Development of High-Strain-Rate Superplastic Oxide Ceramics

Superplastically foaming method for inclusion of closed pores in fully densified ceramics

セラミックス超塑性の粒界ネットワーク • ダイナミクス

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Superplasticity of Yttria-Stabilized Tetragonal ZrO2Polycrystals

Cited by 566 publications

References 10 publications

Development of High-Strain-Rate Superplastic Oxide Ceramics

Development of High-Strain-Rate Superplastic Oxide Ceramics

Superplastically foaming method for inclusion of closed pores in fully densified ceramics

セラミックス超塑性の粒界ネットワーク • ダイナミクス

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Superplasticity of Yttria-Stabilized Tetragonal ZrO₂Polycrystals