Effect of hafnium oxide on continuous aluminum oxide-mullite-hafnium oxide composite ceramic fibers |
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| Affiliation: | 1. Key Laboratory of Science and Technology on High-tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), Materials Synthesis and Processing (IEK-1), Wilhelm-Johnen-Straße, 52428 Juelich, Germany;2. RWTH Aachen University, Institute of Mineral Engineering (GHI), Aachen, Germany;3. JARA-Energy, Juelich, Germany;1. School of Chemistry and Materials Engineering, Huaihua University, Huaihua 418000, China;2. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, China;3. Zhejiang Lab, Hangzhou 311100, China;4. College of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;5. College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027 China;1. Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6–1 Kasuga-koen, Kasuga-shi, Fukuoka 816-8580, Japan;2. Research Center for Structural Materials, National Institute for Materials Science, 1–2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;3. Research Network and Facility Services Division, National Institute for Materials Science, 1–2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;4. Nanostructures Research Laboratory, Japan Fine Ceramics Center, 2–4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan;1. Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China;2. School of Mechanical Engineering, Guilin University of Aerospace Technology, Guilin 541004, China;3. Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China;1. Department of Materials Design Innovation Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan;2. Research Center for Functional Materials, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan;3. Department of Mechanical Science and Bioengineering, Osaka University, 1-3 Machikaneyamacho, Toyonaka, Osaka 560-8531, Japan;1. State Key Laboratory for Mechanical Behavior of Materials & School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2. State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China;3. Yixin Electronic Material Co., Ltd, Rizhao 272306, China |
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| Abstract: | The Al2O3-mullite-HfO2 (AMH) ceramic fiber with a 20 wt% of HfO2 has demonstrated good tensile strength and good high-temperature stability due to the tiny diameter and small grains even at high temperatures. To investigate the effect of HfO2 on crystal behavior and high-temperature performance, continuous AMH ceramic fibers with different HfO2 contents (0 wt%, 10 wt%, and 50 wt%) were prepared by melt-spinning of polymer precursors. The effect of HfO2 on the crystal form transition process, mechanical properties, and high-temperature resistance of AMH fibers was studied by in-situ XRD and STEM. The AMH fibers with 50 wt% HfO2 had the highest strength retention rate of 78.33% after heat treatment at 1200 °C for 0.5 h. After 0.5 h of heat treatment at 1500 °C, the grain size of the AMH fibers with 50 wt% HfO2 was still less than 200 nm. |
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| Keywords: | Ceramic fiber Grain size Tensile strength High-temperature resistance |
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