Ronald Howard Baney

The question of flexibility around the silicon-nitrogen bond in polysilazanes. A comparison with polysiloxanes

Abstract A novel polymer system containing SiNSi backbone structures, (Me 2 SiCH 2 CH 2 SiMe 2 NH) x , has been synthesized. Comparison of this polymer system with its siloxane analogue along with related siloxane and silazane polymer system by broadline NMR studies and studies of temperature dependence of viscosities revealed no extensive stiffening of the SiNSi chains.

The Conversion of Methylchloropolysilanes and Polydisilylazanes to Silicon Carbide and Silicon Carbide/Silicon Nitride Ceramics, Respectively

Engineering or structural ceramics have received attention by materials scientists in recent years. Much of the effort has been prompted by a need for energy conservation. This has translated into the search for materials with higher specific strengths for weight savings and material for higher temperature Carnot efficiencies for heat engine applications. The super alloys have been asymptotically approaching a limit of around 1373K; thus design engineers have turned to ceramics. The use of ceramic materials presents several technical problems one of which is their formation into complex shapes.