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Method for preparing C/C composite material ZrB2-SiC (Al) anti-oxidation coating through hot-pressing rapid sintering
The invention relates to a method for preparing a C/C composite material ZrB2-SiC (Al) anti-oxidation coating through hot-pressing rapid sintering, and belongs to the technical field of design and preparation of C/C composite material anti-oxidation coatings. The problems that in the prior art, a ZrB2-SiC coating is complex in preparation process, long in period and not prone to large-scale implementation, the oxidation resistance of the ZrB2-SiC coating is insufficient, and the distribution uniformity of all phases of ceramic and the density of the coating are not high are solved. According to the invention, ultrafine powder is adopted, and a wet ball-milling process is combined, so that the distribution uniformity of each phase of the coating is improved, and powder agglomeration is reduced; rapid sintering of discharge plasma is adopted and matched with stepped heating, rapid and sufficient sintering of powder is promoted, and the anti-oxidation coating which is high in density and high in binding force with a base body is obtained; a trace amount of Al2O3 is added to promote powder sintering, meanwhile, the outermost SiO2-rich glass layer generated after oxidation is modified, Si-O-Al bonds are formed, the stability of a SiO2-rich glass film is enhanced, and the oxidation resistance of the ZrB2-SiC coating is further improved; the process is simple, the preparation period is short, and large-scale implementation is easy.
本发明涉及一种热压快速烧结制备C/C复合材料ZrB2‑SiC(Al)抗氧化涂层的方法，属于C/C复合材料抗氧化涂层的设计及制备技术领域，解决了现有技术中ZrB2‑SiC涂层制备工艺复杂、周期长、不易规模化实施、且ZrB2‑SiC涂层的抗氧化性能不足、陶瓷各相分布均匀性和涂层致密度不高的问题。本发明采用超细粉末，结合湿法球磨工艺，提升涂层各相分布均匀性、减少粉末团聚；采用放电等离子快速烧结，配合阶梯升温，促进粉末的快速充分烧结，得到致密度高、与基体结合力强的抗氧化涂层；添加微量Al2O3促进粉末烧结，同时对氧化后生成的最外层富SiO2玻璃层进行改性，形成Si‑O‑Al键，增强富SiO2玻璃膜稳定性，进一步提升ZrB2‑SiC涂层的抗氧化能力；工艺简单，制备周期短，易于规模化实施。
Method for preparing C/C composite material ZrB2-SiC (Al) anti-oxidation coating through hot-pressing rapid sintering
The invention relates to a method for preparing a C/C composite material ZrB2-SiC (Al) anti-oxidation coating through hot-pressing rapid sintering, and belongs to the technical field of design and preparation of C/C composite material anti-oxidation coatings. The problems that in the prior art, a ZrB2-SiC coating is complex in preparation process, long in period and not prone to large-scale implementation, the oxidation resistance of the ZrB2-SiC coating is insufficient, and the distribution uniformity of all phases of ceramic and the density of the coating are not high are solved. According to the invention, ultrafine powder is adopted, and a wet ball-milling process is combined, so that the distribution uniformity of each phase of the coating is improved, and powder agglomeration is reduced; rapid sintering of discharge plasma is adopted and matched with stepped heating, rapid and sufficient sintering of powder is promoted, and the anti-oxidation coating which is high in density and high in binding force with a base body is obtained; a trace amount of Al2O3 is added to promote powder sintering, meanwhile, the outermost SiO2-rich glass layer generated after oxidation is modified, Si-O-Al bonds are formed, the stability of a SiO2-rich glass film is enhanced, and the oxidation resistance of the ZrB2-SiC coating is further improved; the process is simple, the preparation period is short, and large-scale implementation is easy.
本发明涉及一种热压快速烧结制备C/C复合材料ZrB2‑SiC(Al)抗氧化涂层的方法，属于C/C复合材料抗氧化涂层的设计及制备技术领域，解决了现有技术中ZrB2‑SiC涂层制备工艺复杂、周期长、不易规模化实施、且ZrB2‑SiC涂层的抗氧化性能不足、陶瓷各相分布均匀性和涂层致密度不高的问题。本发明采用超细粉末，结合湿法球磨工艺，提升涂层各相分布均匀性、减少粉末团聚；采用放电等离子快速烧结，配合阶梯升温，促进粉末的快速充分烧结，得到致密度高、与基体结合力强的抗氧化涂层；添加微量Al2O3促进粉末烧结，同时对氧化后生成的最外层富SiO2玻璃层进行改性，形成Si‑O‑Al键，增强富SiO2玻璃膜稳定性，进一步提升ZrB2‑SiC涂层的抗氧化能力；工艺简单，制备周期短，易于规模化实施。
Method for preparing C/C composite material ZrB2-SiC (Al) anti-oxidation coating through hot-pressing rapid sintering
一种热压快速烧结制备C/C复合材料ZrB2-SiC(Al)抗氧化涂层的方法
LI LU (Autor:in) / YU YUE (Autor:in) / YANG JINSHAN (Autor:in) / ZHENG RUIXIAO (Autor:in) / MA CHAOLI (Autor:in)
15.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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