Journal of Materials Science

, Volume 29, Issue 21, pp 5576–5582 | Cite as

Compatibility between PAN-based carbon fibres and Mg8Li alloy during the pressure infiltration process

  • S. Kudela
  • V. Gergely
  • E. Jänsch
  • A. Hofmann
  • S. Baunack
  • S. Oswald
  • K. Wetzig


The interaction of PAN-based T800H type carbon fibres, which had been coated with (i) pyrocarbon and (ii) pyrocarbon+SiC protective layers, was studied by means of SEM, energy-dispersive X-ray analysis and Auger electron spectroscopy. The interaction occurred during the pressure infiltration process at temperatures from 898 to 908 K and at contact times of 4–30 s. As detected by AES measurements, both Mg and Li penetrated throughout the carbon fibres, and Li2C2 was formed without remarkable reaction zone occurrence, which led to carbon fibre degradation. The pyrocarbon layer (about 50 nm thick) demonstrated a good protective efficiency and the corresponding metal-matrix composite exhibited satisfying strength characteristics; nevertheless, the influence of processing variables (temperature, time) was obvious. On the other hand, the double-coated pyrocarbon+SiC carbon fibres were strongly affected by Li2C2 formation.


Auger Carbon Fibre Auger Electron Spectroscopy Electron Spectroscopy Protective Efficiency 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • S. Kudela
    • 1
  • V. Gergely
    • 1
  • E. Jänsch
    • 2
  • A. Hofmann
    • 2
  • S. Baunack
    • 3
  • S. Oswald
    • 3
  • K. Wetzig
    • 3
  1. 1.Institute of Materials and Machine MechanicsSlovak Academy of SciencesBratislavaSlovakia
  2. 2.Institute of Materials ResearchTechnical University Chemnitz-ZwickauChemnitzGermany
  3. 3.Institute for Solid State and Materials Research, Institute for Solid State Analytics and Structural ResearchDresdenGermany

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