What is tantalum-carbide?
Tantalum carbonide is an metallic cubic crystalline powder which forms a binary compound family with tantalum or carbon. They are extremely fragile and hard refractory ceramic material with metallic conductivity. They are typically sintered to make brownish-gray, powdery forms. This belongs to the sodium-chloride cubic crystal type. Presently, tantalum carbide is used in cemented carbide sintered as a grain growth inhibitor. This significantly slows down grain growth and has a density at 14.3g/cm3.
What are the characteristics of tantalum caride?
Molecular weight: 192.956 It is a light metallic cubic-crystalline powder that belongs to the sodium-chloride type cubic crystal systems. Insoluble in water; insoluble or inorganic inorganic acid. Soluble in the mixture of hydrofluoric acid (nitric) acid. Decomposable. This substance is highly resistant to oxygen and melts quickly when dissolved in potassium pyrosulfate. It has high conductivity. The resistance to 30O at room temperatures is very low, which shows superconductivity.
What does tantalum carbide do?
The most common material used in human life, carbon is high-temperature resistant, thermal conductivity and chemical stability. These attributes make it a key component of daily life and in the future development and application of science, technology and engineering. A crucible made from graphite has a critical role in preparation of silicon carbide crystals through physical vapor transmission. However, graphite crystal growth cannot be done directly because of corrosion on the crucible’s wall due to high temperatures. Tantalum carbide can be coated on graphite to solve this problem. Tantalum carbide, a ceramic material can be produced by directly reacting tantalum-containing materials with carbon at high temperature. Due to its high melting points and chemical stability, Tantalum carbide is highly resistant against corrosion. As a coating for graphitecrucibles, it is able to protect, enhance the quality of crystals, reduce production costs, and increase reuse rates.
Due to tantalum carbide’s brittleness, and the differences in thermal expansion coefficient between coating and matrix, the bonding strength between layer and matrix is weak. The product will have visible cracks, or may even come off of the carbon matrix while being prepared. High adhesion coatings are therefore essential.
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