Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Tantalum carbide multilayer coating structure and preparation method thereof
The invention relates to a tantalum carbide multilayer coating structure and a preparation method thereof. The structure mainly comprises a tantalum carbide lower layer, a tantalum carbide transition layer and a tantalum carbide upper layer, the preparation method comprises the following steps: preparing a tantalum carbide precursor, mixing tantalum carbide precursor powder, an organic solvent and a binder, and carrying out sufficient ball milling to obtain tantalum carbide slurry; and uniformly coating the surface of a carbon matrix with the slurry, drying and degreasing, and carrying out gradient high-temperature sintering under an inert atmosphere condition to obtain the tantalum carbide multilayer coating. Compared with the prior art, the thick film is prepared on the surface of the carbon substrate by adopting a slurry-sintering method, and the TaC multilayer film without penetrating cracks is formed after crystal grain growth by sintering the randomly oriented TaC pre-coating layer. The multilayer film has excellent mechanical properties, solves the problem that thermal expansion coefficients of an existing TaC coating and a carbon substrate are not matched, and prevents the carbon material substrate from being damaged by open pores, cracks and chemical etching.
本发明涉及一种碳化钽多层涂层结构及其制备方法，所述结构主要包括碳化钽下层、碳化钽过渡层以及碳化钽上层；该制备方法包括碳化钽前驱体的制备，将碳化钽前驱体粉末、有机溶剂和粘结剂混合，球磨充分得到碳化钽浆料；将浆料均匀的涂覆在碳基体表面，干燥脱脂后，在惰性气氛条件下进行梯度高温烧结，得到碳化钽多层涂层。与现有技术相比，本发明采用料浆‑烧结法在碳基体表面制备厚膜，通过烧结随机取向的TaC预涂层，晶粒生长后形成无贯穿性裂纹TaC多层膜。该多层膜具有优异力学性能，解决现有TaC涂层与碳基体之间热膨胀系数不匹配的问题，防止开孔、裂纹和化学刻蚀对碳材料衬底的损坏。
Tantalum carbide multilayer coating structure and preparation method thereof
The invention relates to a tantalum carbide multilayer coating structure and a preparation method thereof. The structure mainly comprises a tantalum carbide lower layer, a tantalum carbide transition layer and a tantalum carbide upper layer, the preparation method comprises the following steps: preparing a tantalum carbide precursor, mixing tantalum carbide precursor powder, an organic solvent and a binder, and carrying out sufficient ball milling to obtain tantalum carbide slurry; and uniformly coating the surface of a carbon matrix with the slurry, drying and degreasing, and carrying out gradient high-temperature sintering under an inert atmosphere condition to obtain the tantalum carbide multilayer coating. Compared with the prior art, the thick film is prepared on the surface of the carbon substrate by adopting a slurry-sintering method, and the TaC multilayer film without penetrating cracks is formed after crystal grain growth by sintering the randomly oriented TaC pre-coating layer. The multilayer film has excellent mechanical properties, solves the problem that thermal expansion coefficients of an existing TaC coating and a carbon substrate are not matched, and prevents the carbon material substrate from being damaged by open pores, cracks and chemical etching.
本发明涉及一种碳化钽多层涂层结构及其制备方法，所述结构主要包括碳化钽下层、碳化钽过渡层以及碳化钽上层；该制备方法包括碳化钽前驱体的制备，将碳化钽前驱体粉末、有机溶剂和粘结剂混合，球磨充分得到碳化钽浆料；将浆料均匀的涂覆在碳基体表面，干燥脱脂后，在惰性气氛条件下进行梯度高温烧结，得到碳化钽多层涂层。与现有技术相比，本发明采用料浆‑烧结法在碳基体表面制备厚膜，通过烧结随机取向的TaC预涂层，晶粒生长后形成无贯穿性裂纹TaC多层膜。该多层膜具有优异力学性能，解决现有TaC涂层与碳基体之间热膨胀系数不匹配的问题，防止开孔、裂纹和化学刻蚀对碳材料衬底的损坏。
Tantalum carbide multilayer coating structure and preparation method thereof
一种碳化钽多层涂层结构及其制备方法
CHEN YIGANG (Autor:in) / YANG XIAOYU (Autor:in) / GOU HONGYANG (Autor:in) / WANG XINTONG (Autor:in) / ZHANG JIAHUI (Autor:in)
09.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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