| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide tantalum carbide powder and solid solution of tantalum carbide-niobium as raw material for composite material, each of which is composed of fine and uniform particles uniformly dispersed, also stoichiometrically sufficiently bonded with carbon and has a low oxygen content, and to provide their production methods. <P>SOLUTION: Each of the tantalum carbide powder and tantalum carbide-niobium composite powder has a primary particle average diameter of 0.10 to 0.40 μm measured by a specific surface area method (BET method), a secondary particle average diameter of 0.40 to 1.0 μm measured by an FSSS method, and also has (the primary particle average diameter/secondary particle average diameter) within the range of 0.21 to 0.40. <P>COPYRIGHT: (C)2008,JPO&INPIT |
