Influence of the Fiber-Matrix Interface on the Strength of Unidirectional Carbon Fiber Reinforced Magnesium Composites

  1. B. Jouffrey
  1. M. Ottmüller,
  2. C. Körner and
  3. R.F. Singer

Published Online: 9 MAY 2006

DOI: 10.1002/3527606165.ch25

Microstructural Investigation and Analysis, Volume 4

Microstructural Investigation and Analysis, Volume 4

How to Cite

Ottmüller, M., Körner, C. and Singer, R.F. (2000) Influence of the Fiber-Matrix Interface on the Strength of Unidirectional Carbon Fiber Reinforced Magnesium Composites, in Microstructural Investigation and Analysis, Volume 4 (ed B. Jouffrey), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606165.ch25

Author Information

  1. Lehrstuhl für Werkstoffkunde und Technologie der Metalle, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany www.wtm.uni-erlangen.de

Publication History

  1. Published Online: 9 MAY 2006
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301218

Online ISBN: 9783527606160

SEARCH

Keywords:

  • microstructural investigation;
  • metal matrix composites;
  • carbon fiber reinforced magnesium composites;
  • influence of the fiber-matrix interface on the strength

Summary

The mechanical properties of carbon fiber reinforced magnesium alloys strongly depend on the nature of the fiber-matrix interface. The interface strength is very low for pure magnesium since magnesium and C-fibers are a non-reactive system. As a result, the off-axis properties of the composites are rather poor. Two different approaches to enhance the interface strength are investigated: a) by carbide formation and b) by a TiN-fiber coating. The intensity of carbide formation increases with increasing aluminum content of the Mg-alloy and fiber reactivity. The formation of carbides produces a significant improvement of the off-axis properties at the expense of the in-axis strength. A TiN-coating inhibits the carbide formation. Improving the adhesion between fiber and matrix by a TiN-fiber coating enables a significant increase of the off-axis properties without negative influence on the in-axis strength.