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Ultrahigh-temperature ceramic-based composite material with La/Y-doped ZrC-SiC coating and preparation method of ultrahigh-temperature ceramic-based composite material
The invention relates to a C/ZrC-SiC superhigh-temperature ceramic matrix composite material with a La/Y doped ZrC-SiC coating and a preparation method, a gradient embedding method is adopted, embedding powder with different components is subjected to gradient setting, and the C/ZrC-SiC superhigh-temperature ceramic matrix composite material with the La/Y doped ZrC-SiC coating is prepared through the reaction of a silicon-zirconium alloy melt and a carbon matrix and the reaction between the silicon-zirconium alloy melt and a lanthanum oxide/yttrium oxide (La2O3/Y2O3) and carbon powder mixture. The C/ZrC-SiC superhigh-temperature ceramic matrix composite material with the La/Y doped ZrC-SiC coating is prepared through one-step reaction. The obtained material matrix has a plurality of ultrahigh-temperature ceramic components, and meanwhile, an ablation-resistant coating is generated on the surface of the material through in-situ reaction. The obtained material has good mechanical properties, the content of ZrC and SiC in a matrix is high, an in-situ generated coating and the modified matrix are fused into an integrated structure, and stress concentration caused by thermal mismatch between the coating and the matrix can be well relieved. The method is suitable for preparing the ZrC-SiC modified C/C and C/SiC composite material with the La/Y doped ZrC-SiC coating, and the ablation resistance of the C/C and C/SiC composite material in the ultrahigh-temperature environment is effectively improved.
本发明涉及一种具有La/Y掺杂ZrC‑SiC涂层的C/ZrC‑SiC超高温陶瓷基复合材料及制备方法，采用梯度包埋法，将不同成分的包埋粉进行梯度设置，利用硅锆合金熔体与碳基体的反应及硅锆合金熔体与氧化镧/氧化钇(La2O3/Y2O3)和碳粉混合物之间的反应，一步反应制备了具有La/Y掺杂ZrC‑SiC涂层的C/ZrC‑SiC超高温陶瓷基复合材料。得到的材料基体具有多种超高温陶瓷组分，同时材料表面原位反应生成耐烧蚀涂层。得到的材料具有良好的力学性能，基体中ZrC、SiC含量高，原位生成的涂层与改性基体之间融合成一体化结构，可较好的缓解涂层与基体间热失配引起的应力集中。本发明适用于具有La/Y掺杂ZrC‑SiC涂层的ZrC‑SiC改性C/C和C/SiC复合材料的制备，有效提高C/C和C/SiC复合材料在超高温环境下的抗烧蚀性能。
Ultrahigh-temperature ceramic-based composite material with La/Y-doped ZrC-SiC coating and preparation method of ultrahigh-temperature ceramic-based composite material
The invention relates to a C/ZrC-SiC superhigh-temperature ceramic matrix composite material with a La/Y doped ZrC-SiC coating and a preparation method, a gradient embedding method is adopted, embedding powder with different components is subjected to gradient setting, and the C/ZrC-SiC superhigh-temperature ceramic matrix composite material with the La/Y doped ZrC-SiC coating is prepared through the reaction of a silicon-zirconium alloy melt and a carbon matrix and the reaction between the silicon-zirconium alloy melt and a lanthanum oxide/yttrium oxide (La2O3/Y2O3) and carbon powder mixture. The C/ZrC-SiC superhigh-temperature ceramic matrix composite material with the La/Y doped ZrC-SiC coating is prepared through one-step reaction. The obtained material matrix has a plurality of ultrahigh-temperature ceramic components, and meanwhile, an ablation-resistant coating is generated on the surface of the material through in-situ reaction. The obtained material has good mechanical properties, the content of ZrC and SiC in a matrix is high, an in-situ generated coating and the modified matrix are fused into an integrated structure, and stress concentration caused by thermal mismatch between the coating and the matrix can be well relieved. The method is suitable for preparing the ZrC-SiC modified C/C and C/SiC composite material with the La/Y doped ZrC-SiC coating, and the ablation resistance of the C/C and C/SiC composite material in the ultrahigh-temperature environment is effectively improved.
本发明涉及一种具有La/Y掺杂ZrC‑SiC涂层的C/ZrC‑SiC超高温陶瓷基复合材料及制备方法，采用梯度包埋法，将不同成分的包埋粉进行梯度设置，利用硅锆合金熔体与碳基体的反应及硅锆合金熔体与氧化镧/氧化钇(La2O3/Y2O3)和碳粉混合物之间的反应，一步反应制备了具有La/Y掺杂ZrC‑SiC涂层的C/ZrC‑SiC超高温陶瓷基复合材料。得到的材料基体具有多种超高温陶瓷组分，同时材料表面原位反应生成耐烧蚀涂层。得到的材料具有良好的力学性能，基体中ZrC、SiC含量高，原位生成的涂层与改性基体之间融合成一体化结构，可较好的缓解涂层与基体间热失配引起的应力集中。本发明适用于具有La/Y掺杂ZrC‑SiC涂层的ZrC‑SiC改性C/C和C/SiC复合材料的制备，有效提高C/C和C/SiC复合材料在超高温环境下的抗烧蚀性能。
Ultrahigh-temperature ceramic-based composite material with La/Y-doped ZrC-SiC coating and preparation method of ultrahigh-temperature ceramic-based composite material
具有La/Y掺杂ZrC-SiC涂层的超高温陶瓷基复合材料及制备方法
FAN SHANGWU (Autor:in) / MA JINGCHAO (Autor:in) / KOU SIJIE (Autor:in) / MA XU (Autor:in) / MA YUJIE (Autor:in) / LIU YINGHAO (Autor:in) / YANG SHAOBO (Autor:in)
22.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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