Role of some rare earth (RE) ions (RE = La, Pr, Nd, Sm, Gd and Dy) in crystal and mechanical behaviours of sol�?�gel derived ZrO2�??2 mol% RE2O3 spun fibres calcined at 1300°C

Bulletin of materials science

D Ganguli¹  M Chatterjee²  M K Naskar² 

[1] Solâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, India$$Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India$$Solâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, IndiaSolâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, India$$Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India$$Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700 032, IndiaSolâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, India$$Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India$$;Solâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, India$$Solâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, IndiaSolâ€�?�Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, India$$

关键词: Rare earth;    ionic size;    crystallization temperature;    phase transformation;    lattice strain;    tensile strength.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Crystal behaviours such as crystallization temperature (amorphous to tetragonal (ð‘�?) zirconia), tendency of phase transformation (tetragonal to monoclinic (ð‘�?) zirconia) and lattice strain were studied with mechanical property e.g. tensile strength of solâ€�?�gel derived ZrO₂â€�??2 mol% RE₂O₃ (RE = La, Pr, Nd, Sm, Gd and Dy) spun fibres. Rare earth cations of varying sizes played a significant role in changing the above mentioned properties of ZrO₂â€�??2 mol% RE₂O₃ fibres. It was found that with decreasing the ionic size difference between the zirconium and RE ions, crystallization temperature (amorphous $ightarrowt$-ZrO₂) decreased, the probability of phase transformation ($t ightarrow m$) decreased, lattice strain which is related to lattice distortion decreased and tensile strength increased.

【 授权许可】

Unknown