Bulk nanocomposites possessing very high hardness in which TiN nanocrystallites are homogeneously embedded in an amorphous Si3N4 matrix are produced from perhydropolysilazane and tetrakisdimethylaminotitanium. That is, a low-molecular-weight TiN molecule is mixed in controlled molar ratio with a polymeric Si3N4 precursor; further processing, including ammonolysis, warm pressing, and controlled nanocrystal growth, yields nanocomposites with the desired properties.
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Proust et al. (2014) studied this question.
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