process for the production of rings of mechanical performance of silicon nitride reinforced front for reaction (rbsn), and relative product.

摘要

process for the production of sealing elements and, in particular, rings of mechanical performance front to cooling pumps.consisting of the compaction of powder of silicon according to the shape, and in the treatment of or in the oven, performed in two stages, the first of which is empty.until about 700u00b0c, and the final phase at atmospheric pressure in static environment of n2 containing hydrogen gas.