Assertion: silicon carbide's carbon | /r/CapableOf | react with surficial sio
Facets:
value: to prevent the sio 2
type: PURPOSE
Source sentences:
text: This enhances densification significantly because the carbon reacts with surficial SiO 2 to prevent the SiO 2 to SiO condensation/evaporation while the boron is theorized to eliminate surface diffusion and modify grain boundary energy to make the dihedral angle conducive to pore shrinkage.