Microstructure and properties of carbon-carbon composites from low cost clvd process

Introduction New rapid CLVD process is a low cost densification technique for the fabrication of carbon-carbon composites ,which reduces the processing time from 100 days to several hours and achieve high density,compared with conventional densification processes----liquid impregnation and chemical vapor deposition or infiltration. For its fast deposition rate and well performances of carbon-carbon composites CLVD process is employed by more and more researchers and companies[1] [2]. CLVD process allows rapid densification of various substrates and liquid carbon source to obtained C/C, and can overcome some limitations of the traditional process. The main advantages of such technique include reducing the cost of c/c significantly. We adopt resistant-radiation and induce-heating method at the same time to prepare C/C materials with density of 1.7 g/cm, compression strength of 70MPa and bend strength of 122Mpa.The microstructure of such C/C composites is analysized in this paper.