The rhombic hexecontahedron boron carbide microcrystals – crystal structure analysis

Pavlov, Ivan; Иванова, А. Г.; Филоненко, В. П.; Зибров, И. П.; Voloshin, Alexei E.; Zinin, Pavel V.; Vasiliev, Alexander L.

doi:10.1016/j.scriptamat.2022.115023

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The star-shaped pentagonal microcrystals of boron carbide with extremely low carbon content (~5%) were prepared through the thermobaric treatment of 1,7-bis(hydroxymethyl)- meta -carborane under high pressure of 7 GPa and temperature of 1370 K. The microcrystals exhibit a five-fold symmetry and grow in the shape of stars ( Figure 7 ) [ 142 , 143 ]. The unusual shape of the pentagonal microcrystals makes them unique for developing novel micro-machines and semiconductor micro-devices [ 142 ].…”

Section: Carborane As a Boron Source For Boron-containing Materialsmentioning

confidence: 99%

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Avdeeva,

Nikiforova,

Malinina

et al. 2023

Materials

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Here, we present composites and materials that can be prepared starting with boron hydride cluster compounds (decaborane, decahydro-closo-decaborate and dodecahydro-closo-dodecaborate anions and carboranes). Recent examples of their utilization as boron protective coatings including using them to synthesize boron carbide, boron nitride, metal borides, metal-containing composites, and neutron shielding materials are discussed. The data are generalized demonstrate the versatile application of materials based on boron cluster anions and carboranes in various fields.

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Section: Carborane As a Boron Source For Boron-containing Materialsmentioning

confidence: 99%

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Avdeeva,

Nikiforova,

Malinina

et al. 2023

Materials

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Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Malinina,

Myshletsov,

Buzanov

et al. 2023

Inorganics

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The thermal reduction of the copper(II) complexes [CuII(N2H4)3][B10H10]·nH2O (I·nH2O) and [CuII(NH3)4][B10H10]·nH2O (II·nH2O) has been studied in an argon atmosphere at 900 °C. It has been found that the annealing of both compounds results in a Cu@BN boron-containing copper composite. It has been shown that this process leads to the formation of a boron nitride matrix doped with cubic copper(0) nanoparticles due to the copper(II)→copper(I)→copper(0) thermal reduction. The phase composition of annealing products I900 and II900 has been determined based on powder X-ray diffraction, IR spectroscopy and thermal analysis data. The morphology, average particle size and composition of the composite have been determined by TEM and high-resolution TEM + EDS. The average particle size has been found to be about 81 nm and 52 nm for samples I900 and II900, respectively. Comparison of the results obtained using physicochemical studies has shown the identity of the composition of the products of annealing I900 and II900. The electrical properties of a coating based on an I900 sample modified with Cu0→Cu2O in situ during deposition on a chip at 300 °C in air have been studied. As a result, with increasing temperature, an increase in the electrical conductivity characteristic of semiconductors has been observed.

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The rhombic hexecontahedron boron carbide microcrystals – crystal structure analysis

Cited by 2 publications

References 23 publications

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

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