Abstract
Polyaluminosilazane (PAS) was prepared from cage-type poly(ethyliminoalane), (HAlNEt)n, and perhydropolysilazane (PHPS) as a precursor for SiC/AlN ceramics composite. The precursor was characterized by IR and NMR, which indicated no noticeable progress of polymerization. Solid-state NMR spectra and XRD patterns of pyrolyzed residue from PAS showed that PAS was converted into SiC/AlN ceramics composite upon heating at 1600 degree under Ar. Therefore, PAS was present as a blended polymer and was converted into a ceramic residue during pyrolysis. The ceramic yield of PAS up to 1000 degree was determined by TG operated under an Ar atmosphere to be higher than those of (HAlNEt)n and PHPS.
