Title: A study on fibre reinforced 7740 glass composite and its interface bonding strength

Authors: Lingsen Wang

Addresses: P/M Research Institute, Central-South University of Technology, Changsha, Hunan, 410083, Republic of China

Abstract: Graphite yarn or Nicalon Sic yarn reinforced 7740 borosilicate composites were produced by hot-pressing the lay-up infiltrated unitapes at the temperature of 1200°C under the pressure of 6.7 MPa for 1 hr. in the atmosphere of nitrogen. The flexure strength (σ₂) and the impact toughness (α_κ) of C/7740 composite reached respectively to 792 MPa and 31 KJm⁻². The σ₂ and fracture toughness (Klc) for SiC/7740 composite were 780 MPa and 16.3 MPa m^−1/2 respectively. It was discovered that σ₂, _κ and Klc all had a maximum value with the volume fraction of fibre (Vf) increasing. The best value of Vf was about 40-45%. It was proved that σ₂ was fit well in to the Weibull Distribution as well as the Normal Distribution The interface bonding strength (τ) of SiC/7740 composite was measured successfully by Marshall Indentation Method. The effect of heat-exposing time (t) of fibre in air at 600°C on T and the relationship between τ and Klc were also dealed with. It was also discovered that T increased, but Klc decreased with τ prolonging in the range of present experiment. The mechanism of hot-pressing densification and other problems were also touched with.

Keywords: composite materials; bond strength; test methods; fibres; borosilicate glass; impact toughness; flexure strength; Weibull distribution; hot pressing; ceramics; fibre reinforced composites; glass composites; fracture toughness.

DOI: 10.1504/IJMPT.1993.036562

International Journal of Materials and Product Technology, 1993 Vol.8 No.2/3/4, pp.497 - 506

Published online: 04 Nov 2010 *

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