Why is tantalum carbide easy to be melted and decomposed by potassium pyrosulfate？
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Author : Lzh
Update time : 2023-02-02 16:33:29
What is tantalum carbide? Tantalum carbide (TaC) ceramic particles have the advantages of a high melting point (3880 ℃), high hardness (2100HV0.05), good chemical stability, and strong electrical and thermal conductivity. However, due to its cost and other problems, only nickel-based, aluminium-based, and other substrates have been reported. Chao and others have prepared nickel-based reinforced tantalum carbide surface composites using laser cladding technology. The results show that the hardness of this material is significantly improved compared with pure nickel, and the wear rate is significantly lower than hardened steel; Yu et al. studied the relationship between the in-situ reactive directional solidification of nickel-based, chromium-based, aluminium-based reinforced tantalum carbide and its microstructure under high-temperature gradient. The results showed that the solid phase structure changed with the increase of solidification rate, and the volume fraction of tantalum carbide also changed with the change of solidification rate; Wang Wenli et al. used laser cladding technology to prepare in-situ TaC particle-reinforced nickel-based composite coatings on A3 steel. The results showed that under appropriate technological conditions, the TaC particle-reinforced nickel-based composite coatings formed by the laser cladding technology had good shape, smooth surface, and good metallurgical bonding between the coating and the substrate. However, there were few reports on in-situ TaC formation on the steel substrate.
Microstructure of tantalum carbide The microstructure morphology of TaC surface gradient composites was analyzed. The microstructure morphology of layer A, layer B and layer C of the macrostructure of TaC gradient composites were respectively analyzed. The particles of layer A were closely agglomerated, uniformly reacted, and did not disperse to form particles. The particle size was at the nanometer level, so this reaction layer was called the nano TaC layer; The rudiment of square particles appeared in layer B, and the particles were connected and interwoven without dispersion. Its size is in the micrometre range, so this reaction layer is called the micrometre TaC layer; The particles in layer C are located at the junction with the matrix, and each particle is separated by a strip pearlite structure so that its boundary is visible. The particles are completely dispersed at the edge of the reaction zone. Therefore, this reaction layer is called the TaC dispersion layer.
Editing and broadcasting of reaction process of tantalum carbide According to the morphology and distribution of the products during the experiment, a model of the liquid-solid reaction process of tantalum plate in the cast iron matrix was established. The model was divided into the following steps: at the initial stage of the reaction, the reaction generated molten [TaC], the reaction generated TaC, the reaction generated TaC dispersion layer and the complete reaction It can be seen from the reaction model that the atoms in the matrix need to pass through the matrix layer to reach the interface reaction during the reaction process. The reaction process is as follows: At the beginning of the reaction, C atoms reach the surface of the Ta plate through diffusion and bond with the molten [Ta] on the surface of the Ta plate. As Ta has a strong affinity for C when Ta and C meet, the in-situ reaction takes place to generate [TaC] eutectic. The C in the matrix continues to diffuse and combine with the [TaC] eutectic. When its concentration reaches saturation in the melt, the carbide TaC particles are precipitated, nucleated, and grow up. The C, not combined with the eutectic [TaC], continues to diffuse to the surface of the Ta plate, and the molten [Ta] on the Ta plate surface reacts in situ to generate [TaC] eutectic.
Price of tantalum carbide Tantalum carbide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of tantalum carbide. A large amount of large amount will be lower. The price of tantalum carbide can be found on our company's official website.
Tantalum carbide supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including tantalum carbide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective tantalum carbide, you are welcome tocontact usor inquire any time.
