High-pressure, high-temperature synthesis of superhard boron suboxide

Book · Tue Dec 31 00:00:00 EST 1996

OSTI ID:470906

Hubert, H; Garvie, L A.J.; Leinenweber, K; Buseck, P R; Petuskey, W T; McMillan, P F ^[1]

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1. Arizona State Univ., Tempe, AZ (United States)

A multianvil device was used to investigate the formation of B{sub x}O phases produced in the 2 to 10 GPa pressure range with temperatures between 1,000 and 1,800 C. Amorphous and crystalline B and BP were oxidized using B{sub 2}O{sub 3} and CrO{sub 3}. Using powder X-ray diffraction and parallel electron energy-loss spectroscopy (PEELS), the authors were unable to detect graphitic or diamond-structured B{sub 2}O, reported in previous studies. The refractory boride B{sub 6}O, which has the {alpha}-rhombohedral boron structure, is the dominant suboxide in the P and T range of the investigation. PEELS with a transmission electron microscope was used to characterize the boron oxides.

• Sponsoring Organization: National Science Foundation, Washington, DC (United States)
• OSTI ID: 470906
• Report Number(s): CONF-951155-; ISBN 1-55899-313-4; TRN: 97:008683
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 27 Nov - 1 Dec 1995; Other Information: PBD: 1996; Related Information: Is Part Of Covalent ceramics III -- Science and technology of non-oxides; Hepp, A.F. [ed.] [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center]; Kumta, P.N. [ed.] [Carnegie Mellon Univ., Pittsburgh, PA (United States)]; Sullivan, J.J. [ed.] [MKS Instruments, Andover, MA (United States)]; Fischman, G.S. [ed.] [Food and Drug Administration, Rockville, MD (United States)]; Kaloyeros, A.E. [ed.] [Univ. of Albany, NY (United States)]; PB: 499 p.; Materials Research Society symposium proceedings, Volume 410
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SYNTHESIS
MICROHARDNESS
BORON OXIDES
VERY HIGH PRESSURE
TEMPERATURE RANGE 1000-4000 K
CRYSTALLIZATION
PHASE STUDIES
TRIGONAL LATTICES
EXPERIMENTAL DATA