Fabrication and characterization of novel excellent thermal-protection Gd2Zr2O7/ZrO2 composite ceramic fibers with different proportions of Gd2Zr2O7 |
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| Affiliation: | 1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Key Lab of Education Ministry for Power Machinery and Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. Gas Turbine Research Institute, Shanghai Jiao Tong University, Shanghai 200240, China;1. State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 25010, PR China;2. Advanced Materials Institute, Shandong Provincial Key Laboratory for Special Silicone-Containing Materials, Qilu University of Technology (Shandong Academy of Science), Jinan 250014, PR China;1. CEITEC - Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic;2. Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2, 61600 Brno, Czech Republic |
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| Abstract: | Three kinds of Gd2Zr2O7/ZrO2 (GZC) composite fibers with different proportions of Gd2Zr2O7 were prepared by electrospinning method through changing the amount of Gd3+ in precursor solutions. The thermal decomposition, crystallization process, high temperature stability and heat-conducting properties of GZC fibers were fully characterized. The results showed that there were three crystalline phases, tetragonal phase ZrO2, cubic phase ZrO2 and defect fluorite phase Gd2Zr2O7 in all the GZC fibers. The content of Gd2Zr2O7 increased gradually with the increase of Gd3+ in precursor solutions which led to the gradual slowing down of grain growth rate, the decrease of thermal conductivity and the increase of high temperature stability of the obtained composite fibers. The thermal conductivities of all the GZC fiber sheets were lower than that of 7YSZ fiber sheet. The sheets of all the GZC fibers could keep the high temperature stability up to 1300 °C. |
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| Keywords: | Composite fibers Zirconate Thermal conductivity Grain growth rate High temperature stability |
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