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Mechanical behaviors of alumina ceramics doped with rare-earth oxides 被引量:9

Mechanical behaviors of alumina ceramics doped with rare-earth oxides
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摘要 The effects of three types of additives Y2O3, La2O3, and Sm2O3 on the sintering and mechanical behaviors of alumina ceramics were investigated. The bending strengths of alumina ceramics with Sm2O3 and Y2O3 additions were 455 and 439 MPa, respectively, higher than that with La2O3 addition. The fi'acture 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. The effects of three types of additives Y2O3, La2O3, and Sm2O3 on the sintering and mechanical behaviors of alumina ceramics were investigated. The bending strengths of alumina ceramics with Sm2O3 and Y2O3 additions were 455 and 439 MPa, respectively, higher than that with La2O3 addition. The fi'acture 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.
出处 《Rare Metals》 SCIE EI CAS CSCD 2010年第5期456-459,共4页 稀有金属(英文版)
基金 supported by the School Fund of Nanjing University of Information Science and Technology
关键词 rare earths ALUMINA DOPING mechanical properties MICROSTRUCTURE rare earths alumina doping mechanical properties microstructure
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  • 1R. Singh,C. Gill,S. Lawson,G. P. Dransfield. Sintering, microstructure and mechanical properties of commercial Y-TZPs[J] 1996,Journal of Materials Science(22):6055~6062
  • 2M. V. Swain. Grain-size dependence of toughness and transformability of 2mol% Y-TZP ceramics[J] 1986,Journal of Materials Science Letters(11):1159~1162
  • 3F. F. Lange,H. Shubert,N. Claussen,M. Ruhle. Effects of attrition milling and post-sintering heat treatment on fabrication, microstructure and properties of transformation toughened ZrO2[J] 1986,Journal of Materials Science(3):768~774
  • 4K. Niihara,R. Morena,D. P. H. Hasselman. Evaluation ofK Ic of brittle solids by the indentation method with low crack-to-indent ratios[J] 1982,Journal of Materials Science Letters(1):13~16

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