在氧化乙烯燃烧火下化/化纤维单体陶的废弃性能
Qingqing Chen1, Yuan Zhang2, Yu Zhou3,4,5
1School of Electronic Engineering and Intelligent Manufacturing, Anqing Normal University, Anqing 246133, China.
Materials (Basel, Switzerland)
|October 28, 2023
概括
化/化 (Si3N4/BN) 纤维状单质陶在氧乙烯火焰下显示复杂的剥离率. 形成了一层保护性玻璃层,随着时间的推移增强了废弃性.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程
背景情况:
- 先进的陶复合材料对于高温应用至关重要.
- 了解剥离行为是材料耐用性的关键.
研究的目的:
- 为了研究Si3N4/BN纤维单质陶的剥离性能和微观结构演变.
- 为了评估材料对极端热条件的耐受性.
主要方法:
- 通过湿挤出和热压制,制备Si3N4/BN纤维单质陶.
- 使用氧乙烯火焰进行可控持续时间 (60s x 10, 20, 30) 的废弃试验.
- 废弃表面的微观结构分析.
主要成果:
- 观察到复杂质量和线性剥离率,最初增加,然后减少,并随着剥离时间再次增加.
- 形成一个多孔的,类似珊瑚的表面结构,经过长时间的切除后出现裂.
- 在Si3N4表面上形成了富含烧结辅助剂的保护性玻璃相层,作为消耗屏障.
结论:
- Si3N4/BN纤维单质陶表现出动态剥离特性.
- 烧结辅助剂衍生玻璃相的形成对于改善剥离电阻至关重要.
- 该材料显示出适用于需要高热氧化稳定性的应用的潜力.
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