Étude des phénomènes de mouillabilité du carbone par le brai liquide

✍ Scribed by J. Schultz; Z. Kessaissia

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 547 KB
• Volume: 20
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(82)90038-0

✦ Synopsis

One of the processes used in the manufacture of carbon/carbon composites makes use of impregnation with pitch of a multidirectional structure of carbon rods made of carbon fibres at high temperature followed by carbonization under high pressure. A densification of the composite is obtained by repeated impregnations.

Since the mechanical properties of the composites must likely depend on the quality of the interface formed between the carbon rod and the liquid pitch matrix, the wetting properties of pitches of various origins and properties (Table 1) were studied for several carbon rods (Table 2). A lensiometric method based on the weight of pitch lifted during immersion of the carbon rod at 350°C was used (Fig. 1).

Measurements of the surface energy of the pitches in the liquid state at 350°C (Table 3