Microstructure and mechanical properties of metal/ceramic microlaminate composites

Guodong Shi; Jun Liang; Guiqing Chen; Shanyi Du

Microstructure and mechanical properties of metal/ceramic microlaminate composites

Guodong Shi^*, Jun Liang, Guiqing Chen, Shanyi Du

^*Corresponding author for this work

Harbin Institute of Technology

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

1 Citation (Scopus)

Abstract

The microstructure and mechanical properties of metal (NiCoCrAl)/ceramic (Y₂O₃-ZrO₂) microlaminate composites produced by EB-PVD was investigated. The results showed there were flat and distinct interfaces between metal and ceramic layers. Metal layers were found to consist of γ phase and has a relatively large equiaxed grain structure. While ceramic layers included cubic and tetragonal phases, in which a small columnar grain structure was observed. Furthermore, some evenly distributed micropores in the upper part of metal layers were also seen. The microlaminates exhibited brittle-like behavior without macroscopic plastic deformation in room temperature tensile tests. Examination of fracture surfaces from the samples revealed that the metal layers blunted cracks in the ceramic layers and that delamination at interfaces between layers occurred.

Original language	English
Pages (from-to)	677-680
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	36
Issue number	SUPPL. 2
Publication status	Published - Aug 2007
Externally published	Yes

Keywords

EB-PVD
Metal/ceramic
Microlaminate

Cite this

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title = "Microstructure and mechanical properties of metal/ceramic microlaminate composites",

abstract = "The microstructure and mechanical properties of metal (NiCoCrAl)/ceramic (Y2O3-ZrO2) microlaminate composites produced by EB-PVD was investigated. The results showed there were flat and distinct interfaces between metal and ceramic layers. Metal layers were found to consist of γ phase and has a relatively large equiaxed grain structure. While ceramic layers included cubic and tetragonal phases, in which a small columnar grain structure was observed. Furthermore, some evenly distributed micropores in the upper part of metal layers were also seen. The microlaminates exhibited brittle-like behavior without macroscopic plastic deformation in room temperature tensile tests. Examination of fracture surfaces from the samples revealed that the metal layers blunted cracks in the ceramic layers and that delamination at interfaces between layers occurred.",

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T1 - Microstructure and mechanical properties of metal/ceramic microlaminate composites

AU - Shi, Guodong

AU - Liang, Jun

AU - Chen, Guiqing

AU - Du, Shanyi

PY - 2007/8

Y1 - 2007/8

N2 - The microstructure and mechanical properties of metal (NiCoCrAl)/ceramic (Y2O3-ZrO2) microlaminate composites produced by EB-PVD was investigated. The results showed there were flat and distinct interfaces between metal and ceramic layers. Metal layers were found to consist of γ phase and has a relatively large equiaxed grain structure. While ceramic layers included cubic and tetragonal phases, in which a small columnar grain structure was observed. Furthermore, some evenly distributed micropores in the upper part of metal layers were also seen. The microlaminates exhibited brittle-like behavior without macroscopic plastic deformation in room temperature tensile tests. Examination of fracture surfaces from the samples revealed that the metal layers blunted cracks in the ceramic layers and that delamination at interfaces between layers occurred.

AB - The microstructure and mechanical properties of metal (NiCoCrAl)/ceramic (Y2O3-ZrO2) microlaminate composites produced by EB-PVD was investigated. The results showed there were flat and distinct interfaces between metal and ceramic layers. Metal layers were found to consist of γ phase and has a relatively large equiaxed grain structure. While ceramic layers included cubic and tetragonal phases, in which a small columnar grain structure was observed. Furthermore, some evenly distributed micropores in the upper part of metal layers were also seen. The microlaminates exhibited brittle-like behavior without macroscopic plastic deformation in room temperature tensile tests. Examination of fracture surfaces from the samples revealed that the metal layers blunted cracks in the ceramic layers and that delamination at interfaces between layers occurred.

KW - EB-PVD

KW - Metal/ceramic

KW - Microlaminate

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SN - 1002-185X

VL - 36

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EP - 680

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JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - SUPPL. 2

ER -

Microstructure and mechanical properties of metal/ceramic microlaminate composites

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Keywords

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