A two-dimensional finite-element model is used to compare isothermal and radio-frequency-assisted chemical vapor infiltration of long cylindrical carbon preforms. Densification with radio-frequency heating at a constant input power initially occurs radially around the central zone and then axially toward the ends of the preform. This densification pattern results in significant entrapment of porosity at the center of the preform and requires a relatively long time for completion. A novel scheme for improved radio-frequency heating of long cylindrical preforms is proposed which entails insulating the axial ends of the preform, induction heating at a relatively high operating frequency and linear ramping of input power with time. Simulations show that, under these conditions, radial "inside-out" densification can be achieved uniformly along the entire length of the preform. This scheme results in complete densification of the preform and reduces the overall processing time fivefold when compared to the conventional is thermal process.