It has very strong covalent bonds in their structure producing a hard and brittle material. It has very high degree of stability and resistance thus used to enhance performance of very hard metal machining tools. Tantalum carbide exhibits a hardness of 1570 Hv (Vickers hardness) at 200 c and 800 Hv at 7300c, as compared to titanium carbide which exhibits a hardness of 2930 Hv at 200c and 640 Hv at 7300c. Different carbides show varying mechanical properties. Visit at - http://www.greenearthchem.com/product/tantalum-carbide