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TaCx compounds possess a cubic (rock salt) crystal structure when x is between 0.7 and 1.0. TaC0.5 is composed of two types of crystalline form. The most stable has an anticadmium iodide type trigonal structure. It transforms upon heating up to 2000°C into a hexagonal, non-long-range lattice for carbon atoms.
Tantalum carbide microhardness
The tantalum-carbid surface gradient composite material’s microhardness is measured from the surface to its matrix. The microhardness test must be performed every 50mm from the surface. It can be seen from the distribution of the test hardness that the surface microhardness value for the tantalum carbide composite material is up 2123HV0.02. The microhardness values for the nano TaC layer are 1980-2025HV0.02, 17502010HV0.02, 16401710HV0.02, and TaC dispersion layers are 16401710HV0.02. Although the TaC layer’s microhardness decreases with increasing distance from the surface, it can still reach 5.5 to 7.0 times that of the gray cast-iron matrix.
What is the strength of tantalum carbide.
Tests of Vickers hardness and fracture toughness were done to confirm that TaC has the highest mechanical properties at 5.5 GPa. TaC has a relative density of 7.4 MPa m1/2, Vickers hardness at 21.0 GPa and fracture toughness of 97.7%.
Is tantalum carbide toxic?
Tantalum Compounds – The systemic toxicity of tantalum oxide as well as metallic tantalum is very low. This may be due to the poor solubility of the compound. Carbides – Pure carbon has a low level of toxicity and can be used and ingested as graphite or charcoal.
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