Mechanical behaviors of alumina ceramics doped with rare-earth oxides

Yijun Yao; Chuncheng Li; Ling Wang; Xiaolong Jiang; Tai Qiu

doi:10.1007/s12598-010-0149-5

Mechanical behaviors of alumina ceramics doped with rare-earth oxides

Yijun Yao, Chuncheng Li, Ling Wang, Xiaolong Jiang, Tai Qiu

College of Materials Science and Engineering

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

11 Scopus citations

Abstract

The effects of three types of additives Y₂O₃, La ₂O₃, and Sm₂O₃ on the sintering and mechanical behaviors of alumina ceramics were investigated. The bending strengths of alumina ceramics with Sm₂O₃ and Y ₂O₃ additions were 455 and 439 MPa, respectively, higher than that with La₂O₃ addition. The fracture toughness of the ceramics with Sm₂O₃ and Y₂O₃ were also higher than that with La₂O₃ addition. The fracture mode of rare earth oxides doped alumina ceramics exhibited obvious transgranular fractures as well as intergranular fracture. The results of research show that the improvement of bending strength and fracture toughness of alumina ceramics with rare earth oxides was achieved by refining the grain size and strengthening the grain boundary.

Original language	English
Pages (from-to)	456-459
Number of pages	4
Journal	Rare Metals
Volume	29
Issue number	5
DOIs	https://doi.org/10.1007/s12598-010-0149-5
State	Published - Oct 2010

Keywords

alumina
doping
mechanical properties
microstructure
rare earths

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10.1007/s12598-010-0149-5

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title = "Mechanical behaviors of alumina ceramics doped with rare-earth oxides",

abstract = "The effects of three types of additives Y2O3, La 2O3, and Sm2O3 on the sintering and mechanical behaviors of alumina ceramics were investigated. The bending strengths of alumina ceramics with Sm2O3 and Y 2O3 additions were 455 and 439 MPa, respectively, higher than that with La2O3 addition. The fracture toughness of the ceramics with Sm2O3 and Y2O3 were also higher than that with La2O3 addition. The fracture mode of rare earth oxides doped alumina ceramics exhibited obvious transgranular fractures as well as intergranular fracture. The results of research show that the improvement of bending strength and fracture toughness of alumina ceramics with rare earth oxides was achieved by refining the grain size and strengthening the grain boundary.",

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TY - JOUR

T1 - Mechanical behaviors of alumina ceramics doped with rare-earth oxides

AU - Yao, Yijun

AU - Li, Chuncheng

AU - Wang, Ling

AU - Jiang, Xiaolong

AU - Qiu, Tai

PY - 2010/10

Y1 - 2010/10

N2 - The effects of three types of additives Y2O3, La 2O3, and Sm2O3 on the sintering and mechanical behaviors of alumina ceramics were investigated. The bending strengths of alumina ceramics with Sm2O3 and Y 2O3 additions were 455 and 439 MPa, respectively, higher than that with La2O3 addition. The fracture toughness of the ceramics with Sm2O3 and Y2O3 were also higher than that with La2O3 addition. The fracture mode of rare earth oxides doped alumina ceramics exhibited obvious transgranular fractures as well as intergranular fracture. The results of research show that the improvement of bending strength and fracture toughness of alumina ceramics with rare earth oxides was achieved by refining the grain size and strengthening the grain boundary.

AB - The effects of three types of additives Y2O3, La 2O3, and Sm2O3 on the sintering and mechanical behaviors of alumina ceramics were investigated. The bending strengths of alumina ceramics with Sm2O3 and Y 2O3 additions were 455 and 439 MPa, respectively, higher than that with La2O3 addition. The fracture toughness of the ceramics with Sm2O3 and Y2O3 were also higher than that with La2O3 addition. The fracture mode of rare earth oxides doped alumina ceramics exhibited obvious transgranular fractures as well as intergranular fracture. The results of research show that the improvement of bending strength and fracture toughness of alumina ceramics with rare earth oxides was achieved by refining the grain size and strengthening the grain boundary.

KW - alumina

KW - doping

KW - mechanical properties

KW - microstructure

KW - rare earths

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DO - 10.1007/s12598-010-0149-5

M3 - 文章

AN - SCOPUS:77956499395

SN - 1001-0521

VL - 29

SP - 456

EP - 459

JO - Rare Metals

JF - Rare Metals

IS - 5

ER -

Mechanical behaviors of alumina ceramics doped with rare-earth oxides

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