Carbonized CNT Fiber and Rod (IMAGE) Naval Research Laboratory Caption Images of a carbonized CNT fiber and rod fabricated from phthalonitrile resin pulled from melt and heated to 1000º C. Credit Naval Research Laboratory Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.