Design and fabrication of porous ZrO2</(ZrO2+Ni) sandwich ceramics with low thermal conductivity and high strength

Rubing Zhang; Rujie He; Wenbin Zhou; Yuesheng Wang; Daining Fang

doi:10.1016/j.matdes.2014.05.006

Design and fabrication of porous ZrO₂</(ZrO₂+Ni) sandwich ceramics with low thermal conductivity and high strength

Rubing Zhang (Lead / Corresponding author), Rujie He, Wenbin Zhou, Yuesheng Wang, Daining Fang

Mechanical and Industrial Engineering

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

3Y–ZrO₂/(3Y–ZrO₂ + Ni) sandwich ceramics were fabricated through cold isostatic pressing and pressureless sintering. Porous 3Y–ZrO₂ ceramics with large connecting open pores and permeability were used as interlayers for insulation, whereas outer metal–ceramic layers were used as bearing loads. Microstructures and properties of the porous ZrO₂ and ZrO₂/(ZrO₂ + Ni) sandwich ceramics were investigated in detail. The ZrO₂/(ZrO₂ + Ni) sandwich ceramics exhibited better mechanical properties than the monolithic porous ZrO₂ ceramics at the same low thermal conductivity (approximately 0.85 W/m K). The mechanical properties of the sandwich ceramics were influenced by metal toughening and sintering-induced residual thermal stress.

Original language	English
Pages (from-to)	1-6
Number of pages	7
Journal	Materials & Design
Volume	62
DOIs	https://doi.org/10.1016/j.matdes.2014.05.006
Publication status	Published - Oct 2014

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10.1016/j.matdes.2014.05.006

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AU - He, Rujie

AU - Zhou, Wenbin

AU - Wang, Yuesheng

AU - Fang, Daining

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AB - 3Y–ZrO2/(3Y–ZrO2 + Ni) sandwich ceramics were fabricated through cold isostatic pressing and pressureless sintering. Porous 3Y–ZrO2 ceramics with large connecting open pores and permeability were used as interlayers for insulation, whereas outer metal–ceramic layers were used as bearing loads. Microstructures and properties of the porous ZrO2 and ZrO2/(ZrO2 + Ni) sandwich ceramics were investigated in detail. The ZrO2/(ZrO2 + Ni) sandwich ceramics exhibited better mechanical properties than the monolithic porous ZrO2 ceramics at the same low thermal conductivity (approximately 0.85 W/m K). The mechanical properties of the sandwich ceramics were influenced by metal toughening and sintering-induced residual thermal stress.

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Design and fabrication of porous ZrO₂</(ZrO₂+Ni) sandwich ceramics with low thermal conductivity and high strength

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