Study on heat-resistant property of adhesive/carbon-carbon composites joints

This paper studies the heat-resistant property of the adhesive/carbon-carbon composites joints with infrared analysis, thermogravimetric analysis, energy dispersive X-ray spectroscopy and shear strength tests. Infrared analysis and thermogravimetric analysis indicate that the butadiene-acrylonitrile rubber, non-heat-resistant groups and heat-resistant groups of the main chain structure of the adhesive decomposed initially at 300, 450 and 550 degrees C, respectively. At 750 degrees C, the adhesive has changed into inorganic silicate. The changes of the contents of oxygen and silicate elements on the surface of the adhesive and carbon-carbon composites analyzed with energy dispersive X-ray spectroscopy at different temperatures are in accordance with the results of infrared spectroscopy analysis. Shear strength tests of the adhesive/carbon-carbon composites joints change from 13.2 MPa at room temperature to 0.6 MPa at 750 degrees C, and maintain this up to 900 degrees C, which supports the above analysis. (C) 2005 Published by Elsevier Ltd.