一种难熔金属表面超高温抗烧蚀层状复合涂层及其制备方法
By preparing a layered composite coating consisting of a silicide rough transition layer and an ultra-high temperature carbide ceramic layer on the surface of refractory metals, and using chemical vapor deposition and slurry melting methods, the problems of easy loss and cracking of existing coatings at high temperatures were solved, and high-purity, high-density coatings were prepared, thus improving the ablation resistance of refractory metals.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NORTHWEST INSTITUTE FOR NONFERROUS METAL RESEARCH
- Filing Date
- 2024-03-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing silicide coatings on refractory metal surfaces are easily lost at high temperatures, while ultra-high temperature carbide ceramic coatings have poor density and are prone to cracking. It is difficult to achieve high purity and high density on refractory metal surfaces, and the bonding strength with the substrate is insufficient.
Ultra-high temperature carbide ceramic layers were prepared by chemical vapor deposition, and a silicide rough transition layer was introduced on the surface of a refractory metal substrate. Metallurgical bonding was formed by slurry sintering. A layered composite coating structure was designed to improve bonding strength and thermal stability.
It has achieved high-purity and high-density preparation of ultra-high temperature carbide ceramic layers, which improves the ablation resistance of refractory metals and is suitable for oxidation and heat flow erosion environments above 1900℃, thus solving the problem of ultra-high temperature protection of refractory metals in aerospace devices.
Smart Images
Figure CN118241182B_ABST