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Poly[(methylamino)borazine] (PolyMAB) green fibers of a mean diameter of 15μm have been pyrolyzed under ammonia up to 1000 o C and heat treated under nitrogen up to 2000 o C to prepare boron nitride (BN) fibers. During the polymer-to-ceramic conversion, the mechanical properties of the green fibers increase within the 25-400 o C temperature range owing to the formation of a...
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