| SiBN先驱体陶瓷化行为及结构稳定性分析 |
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| DOI： |
| 中文关键词: SiBN陶瓷 结构稳定性 抗氧化性 |
| 英文关键词:SiBN ceramics, structural stability, oxidation resistance. |
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| 中文摘要: |
| SiBN陶瓷是重要的结构陶瓷和功能陶瓷，在航空和航天领域具有广泛的应用前景，本文针对不同温度制备的SiBN陶瓷的高温结构稳定性及抗氧化性能开展研究。采用TG、FTIR和XRD技术对SiBN先驱体室温至1500℃温域的热解行为、裂解产物组分和结构进行了表征，采用FTIR和XRD技术对SiBN陶瓷氧化行为和氧化机理进行了分析。研究表明，SiBN陶瓷先驱体热解过程主要发生在200ºC至800 ºC范围，该阶段实现了SiBN陶瓷先驱体从有机物向无机物的转化，SiBN陶瓷在室温至1500℃宽温域惰性气氛下具有优异的结构稳定性。但在1500℃氧化产物失重高达17.37%，并伴随明显的组分和结构变化，导致复合材料性能下降或者结构失效。 |
| 英文摘要: |
| SiBN ceramics are important structural and functional ceramics and have wide application prospects in the fields of aviation and aerospace. In this paper, the high-temperature structural stability and oxidation resistance of SiBN ceramics prepared at different temperatures were analyzed and characterized. The pyrolysis behavior of SiBN precursor, composition and structure of the pyrolysis products were characterized by TG, FTIR and XRD techniques at room temperature to 1500℃, the oxidation behavior and mechanism of SiBN ceramics were analyzed by FTIR and XRD techniques. Results showed that the pyrolysis process of SiBN ceramic precursor mainly occurred in the range of 200ºC to 800 ºC, which realized the transformation of SiBN ceramic precursor from organic to inorganic. SiBN ceramics exhibited excellent structural stability in an inert atmosphere over a wide temperature range from room temperature to 1500℃. However, when the oxidation temperature reached 1500℃, the weight loss of SiBN ceramics was up to 17.37%, accompanied by significant composition and structure changes, which would lead to the deterioration of properties or structural failure. |
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