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    Application of Hafnium Silicide in Material Preparation
    Hits:   Date:2020-06-17  
    Hafnium silicide is a transition metal silicide, which is a kind of refractory intermetallic compound. Due to its unique physical and chemical properties, it has been successfully used in complementary metal oxide semiconductor components, thin film coatings, bulk structure components, electric heating Components, thermoelectric materials and photovoltaic materials. Its nanomaterials exhibit special electrical, optical, magnetic and thermoelectric properties, and even have potential application value in the field of catalysis.

    Applications:
    1. Prepare anti-ablation composite coating of silicon carbide-hafnium silicide-tantalum silicide (SiC-HfSi2-TaSi2). Carbon fiber reinforced carbon (C/C) composite material is a new type of high temperature resistant composite material with carbon fiber as reinforcement and pyrolytic carbon as matrix. Due to its excellent high-temperature strength, anti-ablation properties and good friction and wear properties.

    C/C composite materials can be used as thermal structural materials for gas turbine engine structural components, space shuttle nose cone caps, wing leading edges, etc. Most of these components work under high temperature and oxidation environments.

    2. Prepare an organic electroluminescent device. It includes an anode, a light-emitting layer, a cathode, and a packaging cover that are sequentially stacked. The packaging cover packages the light-emitting layer and the cathode on the anode.

    3. Preparation of a silicon-germanium alloy-based thermoelectric element. The silicon-germanium alloy-based thermoelectric element is composed of an electrode layer, a silicon-germanium alloy-based thermoelectric layer, and a barrier layer between the electrode layer and the silicon-germanium alloy-based thermoelectric layer. The barrier layer is a mixture of silicide and silicon nitride. The silicide is at least one of molybdenum silicide, tungsten silicide, cobalt silicide, nickel silicide, niobium silicide, zirconium silicide, tantalum silicide, and hafnium silicide.

    4. Prepare a high temperature resistant and oxidation resistant metal ceramic composite coating. The composite film is characterized in that the coating is composed of refractory metals, refractory carbides and intermetallic compounds, and the thickness of the coating is 10 μm to 50 μm.