Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1690408 | Vacuum | 2015 | 4 Pages |
•High-temperature gradients promote formation of varying phase composition of coating.•Produced BXNYCZ coating has phase composition based on carbon and on boron nitride.•Incorporation carbon to BN and boron in carbon layer result in formation composition.•Produced in an optical furnace nonuniform coating consists of particles of 10–500 nm.•The BXNYCZ coating increase the performance range in electro redox process.
The aim of this study was to elucidate conditions that determine properties of BXNYCZ nanostructure powder coating. Produced in a xenon high-flux optical furnace in a flow of nitrogen coating is nonuniform, does not cover all surface and consists from equiaxed particles of sizes 10–500 nm. High-temperature gradients promote the formation of a continuously varying phase composition of coating depending on the particle size. The largest particles of coating display two types of the powder precipitates: based on carbon and based on boron nitride. Phase composition of the largest particles includes different graphite phases with a prevalence of amorphous carbon, hexagonal BN and (BN)0,26C0,74, rhombohedral B4C and B10C. Raman spectroscopy has confirmed incorporation of carbon to h-BN powder and formation structures with boron in carbon layers and carbon in BN layers, respectively. Obtained powder coating was used in an electroreduction process for measuring oxygen dissolved in a liquid.