Formation of metastable wurtzite phase boron nitride by emulsion detonation synthesis. Issue 8 (2nd April 2018)

• Record Type: Journal Article
• Authors: Örnek, Metin; Hwang, Chawon; Xie, Kelvin Y.; Pratas, Silvio; Calado, João; Burgess, Alan; Domnich, Vladislav; Hemker, Kevin J.; Haber, Richard A.
• Is Part Of: Journal of the American Ceramic Society. Volume 101:Issue 8(2018)
• Page Start: 3276
• Page End: 3281
• Publication Date: 2018-04-02
• Subjects: electron energy‐loss spectroscopy -- emulsion detonation synthesis -- hexagonal phase boron nitride -- transmission electron microscopy -- Wurtzite phase boron nitride; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.15560
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Emulsion detonation synthesis (EDS) is a newly developed process to synthesize nano‐sized ceramic powders based on the detonation of 2 water‐in‐oil emulsions. The process provides high pressure and temperature along with rapid quenching. In this work, we report the formation of wurtzite phase BN (w‐BN) for the first time by EDS process, using hexagonal BN (h‐BN) as the precursor. Characterization studies demonstrated the formation of w‐BN with sizes varying from nanometer to micrometer scale either embedded in or grown from h‐BN matrix. These findings provide a new avenue to synthesize metastable and superhard BN phases.