Properties and densification of nanocrystalline MoSi2-Si3N4 composite from mechanically alloyed powders by pulsed current-activated sintering
- Properties and densification of nanocrystalline MoSi2-Si3N4 composite from mechanically alloyed powders by pulsed current-activated sintering
- 고인용; 강현수; 도정만; 윤진국; 손인진
- Powder metallurgy; Sintering; Nanostructured materials; Mechanical properties
- Issue Date
- Journal of alloys and compounds
- VOL 502, NO 1, L10-L13
- Nanosized MoSi2 and Si3N4 powders were synthesized from Mo2N and Si powders by high-energy ball milling. A dense nanocrystalline MoSi2–Si3N4 composite was consolidated using the pulsed current-activated sintering (PCAS) method within 3 min period from the mechanically activated MoSi2 and Si3N4 powders. A highly dense MoSi2–Si3N4 composite, with relative density of up to 97%, was produced under the simultaneous application of 80 MPa pressure and 2800 A pulsed current. The mean grain size, hardness, and fracture toughness of the composite were investigated.
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