Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of Ta4HfC5 precursor and prepared nano ceramic and high-temperature-resistant composite material
The invention provides a preparation method of a Ta4HfC5 liquid precursor, which comprises the following steps: 1) adding citric acid into ethanol, and fully stirring and dissolving to obtain a citric acid ethanol solution; 2) sequentially adding TaCl5 and HfCl4 into the citric acid ethanol solution according to a molar ratio of 4: 1, and carrying out a dissolution reaction to obtain a Ta4Hf-citric acid complex solution; and step 3), adding small molecular polyol into the Ta4Hf-citric acid complex solution, and carrying out polyesterification reaction to obtain the Ta4HfC5 precursor solution. The preparation method disclosed by the invention is simple and convenient in process, the Ta4HfC5 precursor is cracked at 1600 DEG C to obtain the nano-scale Ta4HfC5 ceramic, and the nano-scale Ta4HfC5 ceramic is moderate in viscosity and can be stored for a long time. Based on the obtained Ta4HfC5 precursor, the Cf/Ta4HfC5-SiC ultrahigh-temperature ceramic matrix composite material is prepared, and the composite material is high in mechanical property and good in ablation resistance.
提供了一种Ta4HfC5液态先驱体的制备方法，包括以下步骤：步骤1)，将柠檬酸加入乙醇中，充分搅拌溶解后得到柠檬酸乙醇溶液；步骤2)，将TaCl5与HfCl4按照摩尔比4:1依次加入柠檬酸乙醇溶液内，经溶解反应后得到Ta4Hf‑柠檬酸配合溶液；步骤3)，在Ta4Hf‑柠檬酸配合溶液中加入小分子多元醇，进行聚酯化反应后即得到Ta4HfC5先驱体溶液。本发明制备方法工艺简便，Ta4HfC5先驱体在1600℃下裂解得到纳米级别Ta4HfC5陶瓷，且粘度适中、能够长时间保存。基于所得Ta4HfC5先驱体，本发明制备了Cf/Ta4HfC5‑SiC超高温陶瓷基复合材料，复合材料力学性能高，抗烧蚀性能良好。
Preparation method of Ta4HfC5 precursor and prepared nano ceramic and high-temperature-resistant composite material
The invention provides a preparation method of a Ta4HfC5 liquid precursor, which comprises the following steps: 1) adding citric acid into ethanol, and fully stirring and dissolving to obtain a citric acid ethanol solution; 2) sequentially adding TaCl5 and HfCl4 into the citric acid ethanol solution according to a molar ratio of 4: 1, and carrying out a dissolution reaction to obtain a Ta4Hf-citric acid complex solution; and step 3), adding small molecular polyol into the Ta4Hf-citric acid complex solution, and carrying out polyesterification reaction to obtain the Ta4HfC5 precursor solution. The preparation method disclosed by the invention is simple and convenient in process, the Ta4HfC5 precursor is cracked at 1600 DEG C to obtain the nano-scale Ta4HfC5 ceramic, and the nano-scale Ta4HfC5 ceramic is moderate in viscosity and can be stored for a long time. Based on the obtained Ta4HfC5 precursor, the Cf/Ta4HfC5-SiC ultrahigh-temperature ceramic matrix composite material is prepared, and the composite material is high in mechanical property and good in ablation resistance.
提供了一种Ta4HfC5液态先驱体的制备方法，包括以下步骤：步骤1)，将柠檬酸加入乙醇中，充分搅拌溶解后得到柠檬酸乙醇溶液；步骤2)，将TaCl5与HfCl4按照摩尔比4:1依次加入柠檬酸乙醇溶液内，经溶解反应后得到Ta4Hf‑柠檬酸配合溶液；步骤3)，在Ta4Hf‑柠檬酸配合溶液中加入小分子多元醇，进行聚酯化反应后即得到Ta4HfC5先驱体溶液。本发明制备方法工艺简便，Ta4HfC5先驱体在1600℃下裂解得到纳米级别Ta4HfC5陶瓷，且粘度适中、能够长时间保存。基于所得Ta4HfC5先驱体，本发明制备了Cf/Ta4HfC5‑SiC超高温陶瓷基复合材料，复合材料力学性能高，抗烧蚀性能良好。
Preparation method of Ta4HfC5 precursor and prepared nano ceramic and high-temperature-resistant composite material
一种Ta4HfC5先驱体制备方法及制得的纳米陶瓷和耐高温复合材料
WAN FAN (Autor:in) / LIU RONGJUN (Autor:in) / WANG YANFEI (Autor:in) / LI DUAN (Autor:in) / LI JUNSHENG (Autor:in) / LIU XINGYU (Autor:in)
16.01.2024
Patent
Elektronische Ressource
Chinesisch
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