Ablation Mechanism of ZrB2-SiC and Csf/ZrB2-SiC Ultra-high Temperature Ceramic Composites
Source abstract
Abstract
通过真空热压工艺制备了ZrB2-SiC材料和Csf（碳短纤维）／ZrB2-SiC超高温陶瓷基复合材料．采用氧乙炔火焰在4186．8kW／m^2的热流下分别喷吹烧蚀两种材料180s．ZrB2-SiC材料表面最高温度达到2406℃，烧蚀后质量烧蚀率为-0．14％，线烧蚀率为1×10^-3mm／s，Csf／ZrB2-SiC材料表面最高温度达到1883℃，烧蚀后质量烧蚀率为-0．19％，线烧蚀率为-4×10^-4mm／s．对两种材料烧蚀表面和剖面的分析发现，ZrB2-SiC材料烧蚀后由表及里依次形成了疏松ZrO2氧化层、SiC富集层和未反应层的三层结构，其中SiC富集层能够起到抗氧化的作用．Csf／ZrB2-SiC材料烧蚀后由外到内分别形成了ZrO2-SiO2氧化层、SiC耗尽层和未反应层的三层结构，其中最外层以ZrO2为骨架，SiO2弥合其中的结构有效地阻挡了烧蚀中氧的侵入．
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (7)
Show source-provided references
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