Assertion: silicon carbide's hardness | /r/CapableOf | compare to single-phase sic polycrystals
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text: In accordance with expectations, analysis of mechan- ical properties confirmed that silicon carbide casts with oxide additives are characterized by decreased hardness comparing to single-phase SiC polycrystals (typical value is 20–25 GPa)  with similar relative density of 98% sintered …