Nanometallocarbosilanes and organoelementoxanes represent a new class of unequaled precursors of components of promising ceramic composites. Ceramic-forming polymers (oligomers) have been synthesized in GNIICHTEOS. They can be used to obtain components of carbide and oxide CCM: nanometallocarbosilanes - precursors of SiC ceramics, modified by mixed carbides (Ta_xZr_yC_z or Ta_xHf_yC_z). Organoelementoxane oligomers represent a new class of precursors for components (binders; coatings; fibers, etc.) of corundum (α-Al₂O₃), aluminosilicate (xAl₂O₃ySiO₂), yttrium aluminum (xY₂O₃yAl₂O₃), yttrium-aluminosilicate (xY₂O₃yAl₂O₃zSiO₂), magnesium aluminum (xMgOyAl₂O₃). yttrium-aluminum-magnesium (xY₂O₃yAl₂O₃zMgO) and high-temperature binary ceramics based on aluminum and yttrium oxides modified by oxides of refractory metals (zirconium, hafnium or chromium) compositions for the preparing high-strength high-temperature and oxidative-resistant ceramic composites.

—This paper presents a study of organomagnesiumoxaneyttroxanealumoxane oligomers soluble in organic solvents and exhibiting fiber-forming properties. We describe processes underlying the...

Zr(Hf)-oxanemagnesiumoxanealumoxane oligomers have been synthesized as precursors of modified aluminum–magnesium ceramics. Physicochemical properties of Zr(Hf)-oxanemagnesiumoxanealumoxanes and ceramic samples were studied. Computation models of group and elemental composition of oligomeric molecules of Zr(Hf)-containing magnesiumoxanealumoxanes have been proposed. It was proved by X-Ray diffraction (XRD) and scanning electron microscopy (SEM) that the pyrolysis of metaloxanemagnesiumoxanealumoxanes at 1500°C led to formation of high-purity fine-crystalline ceramics of spinel composition modified by refractory metal oxides. It was shown that Zr(Hf)-oxanemagnesiumoxanealumoxanes are precursors of high-purity high-temperature stable aluminum–magnesium ceramics modified by zirconium or hafnium oxides.