Studies on Enhancing Transverse Thermal Conductivity in Carbon/Carbon Composites
Abstract
In the present studies, attempts were made to prepare multi-walled carbon nanotubes (MWNTs) on a large scale in the form of aligned carbon nanotubes as arrays. Arrays of these carbon nanotubes were densified, like in carbon felt densification process by filling the space within the nanotubes. Therefore, the work undertaken in the present studies was to develop arrays of MWNTs and to develop aligned MWNTs composite films using chemical vapor infiltration technique. Substantial characterization was completed and documented. Thermal conductivity of as purified aligned carbon nanotube film was 7.169 W/m.K. After infiltration, this densified film showed thermal conductivity of about 16.0 W/m.K. The lattice defects present in these nanocomposites were minimized by graphitization at high temperature. The heat treatment of these films at 2400 deg C yielded increase in thermal conductivity to 10.2761 and 51.319 W/m.K for 950 deg C and 1050 deg C infiltrated films, respectively.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2008
- Accession Number
- ADA487927
Entities
People
- Lalit M. Manocha