Thermodynamics of gas phase carbothermic reduction of boron-anhydride

Dacic, B.Z.; Jokanović, Vukoman; Jokanović, Bojan; Dramićanin, Miroslav D.

doi:10.1016/j.jallcom.2005.03.117

Cited by 24 publications

(16 citation statements)

References 9 publications

(9 reference statements)

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“…2(b), 2(c) shows that the main residual phase in sample A SPSed at low temperature (1600°C) is graphite, while in sample B SPSed at high temperature (2100°C) the amount of impurity phases is low, at traces level. Dacic et al 11) for carbothermal reaction of B 2 O 3 in the air and under normal conditions found that up to about 1600°C B 2 O 3 is in the liquid state and above this temperature decomposes and evaporates into suboxide gas phases. Dacic et al 11) also underlined that under vacuum the equilibrium shifts towards formation of the suboxide gas phases.…”

Section: Resultsmentioning

confidence: 99%

“…Dacic et al 11) for carbothermal reaction of B 2 O 3 in the air and under normal conditions found that up to about 1600°C B 2 O 3 is in the liquid state and above this temperature decomposes and evaporates into suboxide gas phases. Dacic et al 11) also underlined that under vacuum the equilibrium shifts towards formation of the suboxide gas phases. As for carbon, above 1600°C, CO may form and evaporate.…”

Section: Resultsmentioning

confidence: 99%

“…Free B 9) and C 10) in the B 4 C powders were reported to have a favourable contribution to sintering and nearly fully dense samples were obtained, while boron oxides B 2 O 3 , B 2 O 2 and BO are often mentioned to evaporate 11) and to hinder sintering. To have a better understanding of SPS potential for consolidation of boron carbide we used one commercial powder for all experiments.…”

Section: )4)mentioning

confidence: 99%

See 2 more Smart Citations

Tough and dense boron carbide obtained by high-pressure (300 MPa) and low-temperature (1600°C) spark plasma sintering

Badica

Grasso

Borodianska

et al. 2014

J. Ceram. Soc. Japan

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Dense boron carbide (above 95%) was achieved through high pressure (300 MPa) and low temperature (1600°C) Spark Plasma Sintering (SPS). This approach resulted in improvement of fracture toughness and of dynamic toughness when compared to corresponding toughness values of the sample sintered by conventional SPS (2100°C, 50 MPa). Dynamic toughness was extracted from Split Hopkinson Pressure Bar measurements. Results are understood based on microstructure and on very different behaviour of the samples in respect to residual B 2 O 3 and carbon available in the raw B 4 C powder.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: )4)mentioning

confidence: 99%

See 1 more Smart Citation

Tough and dense boron carbide obtained by high-pressure (300 MPa) and low-temperature (1600°C) spark plasma sintering

Badica

Grasso

Borodianska

et al. 2014

J. Ceram. Soc. Japan

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“…T h e r m o d y n a m i c s a n d k i n e t i c s o f carbothermic synthesis of boron carbide was also investigated 4,5 .…”

Section: Boron Carbide Synthesis By Carbothermic Reductionmentioning

confidence: 99%

Issues of Carbothermic Synthesis of Submicron and Nanostructured Boron Carbide (A Review)

Antipov¹,

Antipova²,

Wozniak³

et al. 2016

Orient. J. Chem

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This review shows the important role of nanoscale and submicron boron carbide B4C for modern science and technology. Various procedures of the carbothermic synthesis of nanoscale and submicron forms of boron carbide are reviewed and compared. The paper shows the variety of possible forms and morphology of the products. Particular attention is paid to the influence of the synthesis method on the content of residual free carbon in the product.

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“…This type of precursor might modify the thermodynamics of the carbothermal reaction [30]. However, the requirement of a unique phase of H 3 BO 3 and the resin involves the use of protic solvents such as alcohols.…”

Section: Introductionmentioning

confidence: 99%