Effect of preset interfacial ZrB2 particles on the microstructure and properties of C/C-AlSi composites
Effect of preset interfacial ZrB2 particles on the microstructure and properties of C/C-AlSi composites
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预设界面ZrB2颗粒对C/C-AlSi复合材料组织与性能的影响
DOI：
10.1177/00219983211004693
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发表时间：
2021-04
影响因子：
2.9
通讯作者：
Feilong Liu
中科院分区：
文献类型：
--
作者：
Wei Feng;Chengwei Tang;Lei Liu;Jian Chen;Yang Zhang;Xiyuan Yao;Donglin Zuo;Feilong Liu
通过在C/C预制体中预置ZrB 2颗粒，提高C/C预制体的抗氧化性能，并调整共晶AlSi压力浸渗到纤维织物基多孔C/C骨架中制备的互穿C/C-AlSi复合材料的微观结构。微观形貌研究表明，AlSi织构由枝晶状转变为花瓣状，纳米至微米级的ZrB 2颗粒弥散分布在AlSi中，并影响Al和Si在碳附近的分布。结果表明，C/C-AlSi复合材料的密度和热膨胀系数略低，原始压缩强度较高，而C/C-ZrB 2-AlSi复合材料在热震后具有优异的强度留存率。断口和微观形貌分析表明，预置ZrB 2对碳/合金界面的影响极大地影响了裂纹的产生和扩展，决定了复合材料热震前后不同的压缩行为。
ZrB2 particles were preset to the C-AlSi interface to improve oxidation resistance of C/C preform and adjust the microstructure of the interpenetrated C/C-AlSi composite prepared through pressure infiltration of eutectic AlSi into a fiber fabric based porous C/C skeleton. Micro-morphology investigations suggested that the AlSi textures were changed from dendritic to petals-like state, and the nano to micro-scale ZrB2 particles were dispersed into AlSi and affected the distribution of Al and Si nearby carbon. Tests demonstrated that C/C-AlSi have slight lower density and thermal expansion coefficient, and higher original compressive strength, while C/C-ZrB2-AlSi composites presented an outstanding strength retention rate after thermal shock. Fracture and micro-morphology indicated that the influence of the preset ZrB2 to the interface of carbon and alloy greatly affected the generation and propagation of cracks, which determined the diverse compression behaviors of the composites before and after thermal shock.
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