In order to increase the production efficiency of powder injection moulding for SiC parts, thermal debinding was performed in air furnace without gas shield. Bending tests were performed to evaluate the strength of samples debound under different temperatures. The effects of oxidation on debinding process were also analyzed. Analysis indicates that air could accelerate the debinding rate of green parts without defects occurring. The bending strength of debound samples increases from 6.55 MPa to 11.58 MPa as the presintering temperature increases from 550 degrees C to 850 degrees C. On the other hand, the bending strength of the samples pre-sintered at 1200 degrees C in argon atmosphere is only 11.52 MPa. It was found that, blanks have enough strength for transport after being pre-sintered in air atmosphere at 850 degrees C. The technology could reduce the requirement for heating equipment and enhance the efficiency of debinding for SiC parts. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.