Abstract
We report a stabilized Si3N4 simply with nanocoatings of h‐BN. Very thin BN coatings are enough for suppressing the decomposition of Si3N4 particles. This approach should open up a new potential way to prepare stabilized Si3N4. Reduced nitridation of H3BO3‐coated Si3N4 powder at 1050°C in a flowing mixed 40% N2+60% H2 atmosphere, and then following heat‐treatment at 1500°C in a flowing N2 atmosphere can realize the nanocoating of BN on Si3N4 particles. Compared with the Si3N4 powder without nanocoatings of h‐BN, TG and XRD analysis showed that the obtained h‐BN nanocoated Si3N4 powder demonstrated obviously improved stability in argon atmosphere.
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