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- Title
Rapid Densification of Carbon/Carbon Composites Plate by Pressure-Gradient Chemical Vapor Infiltration.
- Authors
Xia, Li Hong; Huang, Bo Yun; Zhang, Fu Qin; Jin, Lei; Chen, Da; Tang, Qian
- Abstract
Carbon/carbon (C/C) composites plate is prepared in the temperature range 1 223-1 373 K by improved pressure-gradient chemical vapor infiltration (CVI). The bulk densities and pore distributions of C/C composites after different infiltration period are measured and the densification kinetics is investigated. The results show that C/C composites plate with 300 × 300 × 15 mm is able to be densified to 1.52 g cm−3 within 60 h by pressure-gradient CVI. The porosity of pores with a size larger than 60 µm reduces markedly and the large pores are able to be filled more effectively by pressure-gradient CVI. The densification kinetics depends on the temperature and competition between reaction and convection mass transport. The activation energy is about 366 kJ mol-1at 1 223-1 313 K and 43.2 kJ mol−1 above 1 313 K.
- Subjects
SOIL densification; CARBON composites
- Publication
Advanced Engineering Materials, 2017, Vol 19, Issue 5, pn/a
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201600329