| 摘要 |
A process for producing dense bodies from mixtures of materials with significantly different electrical resistivities. A mixture of electrically conducting powder and a dielectric or semiconducting powder is subjected to pressure and an intense electric current pulse of sufficiently short duration such that the heating is largely confined to the material of superior electrical conductivity. Densification is achieved under pressure prior to the attainment of thermal equilibrium within the mixture. Diamond/titanium diboride and boron carbide/titanium carbide composites are typical of the process.
|
