| 摘要 |
<p>Submicron carbide particles are formed from metal containing precursor compositions where the metal is tantalum, niobium, vanadium or chromium by subjecting the precursor composition to a carbonization reaction. The carbonizing gas contains only hydrogen, nitrogen and carbon and the carbonizing reaction is conducted at a temperature of less than 1100 DEG C. By maintaining the carbon deposition potential of the reaction at from 10% to 60%, the precursor composition can be reduced and carburized simultaneously to form the carbide. The formed product has a physical grain size less than 1 micron which significantly improves its ability to be milled with other compositions, as well as its use in cutting tools and the like.</p> |
