Add to ORKGInterfaces in carbon/carbon composites (C/C) are dominant in controlling the mechanical behaviour. The present work dealt with the modification of the fibre/matrix interfacial characteristics of these materials in adding a controlled micro texture carbon interphase. Experiments were conducted on model composites (micro and minicomposites) prepared by chemical vapour deposition (CVD/CVI). Microstructural characterisation and tensile mechanical behaviour at room temperature were studied in parallel in order to better understand the role of the interphase. The heat-treatment influence was also evidenced. Results showed that, according to the interfacial characteristics, carbon/carbon composites can display the different mechanical behaviours o...