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Nb₂O₅对ZTM-Al₂O₃性能及ZrO₂增韧机制的影响

Influence of Nb₂O₅ on the Mechanical Performances and Toughening Mechanism of ZrO₂ in ZTM-Al₂O₃

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【Author】 JIN Xi-Hai, GAO Lian, KAN Yan-Mei, CHEN Yu-Ru, YUAN Qi-Ming (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 Engineeri

【机构】中国科学院上海硅酸盐研究所!上海 200050；天津大学材料科学与工程学院!天津300072；

【摘要】探讨了Ｎｂ２Ｏ５对ＺＴＭ－Ａｌ２Ｏ３的性能和ＺｒＯ２在瓷体中增韧机制的影响．发现Ｎｂ２Ｏ５的引入可明显提高瓷体中ｍ－ＺｒＯ２含量而降低ｔ－ＺｒＯ２含量，材料的机械性能也随Ｎｂ２Ｏ５添加量的增大出现了显著的改善，并且有韧性的平方正比于ｍ－ＺｒＯ２含量的关系．ｍ－ＺｒＯ２含量的增加强化了微裂纹增韧是材料性能改善的原因．更多还原

【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 of the properties.更多还原