Preceramic paper-derived SiCf/Ti3Al(Si)C2 and SiCf/Ti3SiC2 MAX-phase based laminates fabricated using spark plasma sintering

Результат исследований: Материалы для журналаСтатьярецензирование

Аннотация

For the first time SiCf/Ti3Al(Si)C2 and SiCf/Ti3SiC2 MAX-phase based laminates were fabricated from preceramic papers by spark plasma sintering (SPS). The fibers were coated with a 4-µm layer of carbon by chemical vapor deposition. The phase composition and microstructure were analyzed by X-ray diffraction and scanning electron microscopy, respectively. The flexural strength of Ti3Al(Si)C2-based laminates with carbon coated SiC fibers was ~990 MPa, which is 20% higher compared to laminates with uncoated fibers. The carbon coating prevents chemical reaction between the fiber layers and MAX-phase based laminates, providing toughening mechanisms associated with fiber detachment and pull-out. No significant reaction of the fibers occurs during the sintering of SiCf/Ti3SiC2 based laminates, which has a flexural strength of ~850 MPa. The layer-by-layer reinforced structure of laminates along with the presence of strengthening phases (TiC and Al2O3) provides toughening mechanisms due to deflection and branching of cracks at macro and micro scales.

Язык оригиналаАнглийский
Номер статьи113696
ЖурналScripta Materialia
Том194
DOI
СостояниеОпубликовано - 15 мар 2021

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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