METHOD FOR SURFACE MODIFYING BETA-SIC SINTERED BODY

摘要

Purpose: providing a method, modifies β-SiC sintered bodies for surface, improves the fracture of wearability and tension. Construction: a kind of method includes the following steps: to prepare a source powder A, is obtained by mixing 85 wt% of β-SiC of its size less than 1 micron, 9 wt% of alumina (aluminium oxide) and 6 wt% of yttrium oxide (Y2O3); A source B gunpowder is prepared, the 82-84. of β-SiC of its size less than 1 micron is obtained by mixing5 wt%, 9 wt% of alumina, the 0. of 6 wt% and α-SiC of yttrium oxide5-3 wt% promote the growth of particle; The mold body that its surface part is origin source powder A compositions is prepared, inner part is origin source B gunpowder composition; With argon gas stream 1950-2050C at a temperature of be sintered blocking mold body 1-2 hours.