Evaluation of Ammonia Treated Nextel™ 312 Fiber -Blackglas™ Matrix Composites

Characterization of In-Situ BN Interface Formed by Nitridation of Nextel 312

“…4 It also has been shown that the interphase does not react with the matrix on oxidative exposure of the composite at 600°C for up to 1000 hours. 6 We have noted a larger variation in mechanical properties of composites manufactured from fabric nitrided in different runs than among panels produced from cloth from the same nitridation run; and therefore selected panels and samples of fabric from three different runs were chosen for comparison.…”

“…This interpretation is supported by the published TEM data. 6 X-ray diffiaction analysis was performed on ground fiber samples to identifjl crystalline phases. The as heat cleaned AF-10 fiber was totally amorphous, whereas all nitrided samples showed the presence of AlllB4033.…”