Influence of Nb2O5 on the Mechanical Performances and Toughening Mechanism of ZrO_2 in ZTM-Al2O3

Journal of Inorganic Materials

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Influence of Nb₂O₅ on the Mechanical Performances and Toughening Mechanism of ZrO_2 in ZTM-Al₂O₃

JIN Xi-Hai¹; GAO Lian¹; KAN Yan-Mei²; CHEN Yu-Ru²; YUAN Qi-Ming ²

1.State Key Lab of High Performance Ceramics and Superfine Structure; Shanghai Instittute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China; School of Material Science and Engineering, Tianjin University, Tainjin 300072, China

Received:1999-11-23 Revised:1999-12-28 Published:2000-12-20 Online:2000-12-20

Abstract

Abstract: The paper discussed the influence of Nb₂O₅ on the mechanical properties of ZTM Al₂O₃ and the toughening mechanisms of ZrO₂ in the material. The results show that Nb₂O₅ can remarkably increase the m-ZrO₂ content in the ceramics while decreasing the t-ZrO₂ content, The mechanical properties can be greatly improved by Nb₂O₅ addition, and the square of the toughness is in proportion to m-ZrO₂ content. Microcrack toughening enhanced by increasing m-ZrO₂ content is the main factor contributing to the improvement

Key words: Nb₂O₅, mullite, ZrO₂, microcrack toughening

CLC Number:

TQ174

JIN Xi-Hai,GAO Lian,KAN Yan-Mei,CHEN Yu-Ru,YUAN Qi-Ming. Influence of Nb₂O₅ on the Mechanical Performances and Toughening Mechanism of ZrO_2 in ZTM-Al₂O₃[J]. Journal of Inorganic Materials.

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Influence of Nb₂O₅ on the Mechanical Performances and Toughening Mechanism of ZrO_2 in ZTM-Al₂O₃

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