Structural and Mechanical Properties of Activated Sintered Boron Carbide-Based Materials

Radev, D.; Zakhariev, Z.

doi:10.1006/jssc.1997.7550

Cited by 23 publications

(3 citation statements)

References 8 publications

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“…Adding more statistical analysis, the microhardness presented greater correlation with phases WB 2.5 and C (2H) (Radev & Zakhariev, 1998) and apparent density and postsintering densification, expressed by the respective Pearson's correlation coefficients of 0.9998, 0.8893, 0.9974, and 0.9939, as shown in Table 10. Likewise, Pearson's correlation coefficient of 0.5506 for SiC is shown, reaffirming that the phase has little influence on the microhardness of the samples.…”

Section: Comparison Between Sample Means Of a And B Grouped With Cmentioning

confidence: 95%

Analysis of the Influence of Contaminants on Microhardness Sintered Boron Carbide Samples

Aguilera

Filho

Neto

et al. 2022

JART

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This work presents ANOVA and Tukey’s statistic tests that were carried out in Knoop microhardness results of boron carbide sintered samples. Three samples, A, B and C, of different processing conditions were tested and statistical analysis showed that microhardness results are strongly influenced by porosity and chemical composition, mainly due to presence of C(2H) and WB2.5 contaminant phases. Those phases promoted higher densification in A and B samples and it was found that A ≈ B > C is the relation between the microhardness results of the samples, while A ≈ B < C is the porosity ratio of the samples. Furthermore, this work aims to apply a statistical tool to evaluate the microhardness results performed on advanced ceramics and, using these results, to control parameters in the sintering process, showing that a deeper statistical analysis is necessary for the interpretation and validation of the results merit.

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Section: Comparison Between Sample Means Of a And B Grouped With Cmentioning

confidence: 95%

Analysis of the Influence of Contaminants on Microhardness Sintered Boron Carbide Samples

Aguilera

Filho

Neto

et al. 2022

JART

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“… 62 Experimentally synthesized a chemically inert material, boron carbide sheets with boron as a dopant possess the same structure as graphene but exorbitantly changed characteristics to utilize in electronic devices. 63 – 65 Boron carbide (BC 3 ) monolayer serves as a gas sensor for harmful carbonaceous pollutants 66 – 69 and is highly selective and sensitive to acetone. 70 Another 2D monolayer, BC 6 N, has been recently examined for human breath analysis 71 and proved to be a potential candidate for ethanol.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Insight into a B4C3 Monolayer as a Promising Biosensor for Exhaled Breath Analysis

Nosheen

Jalil

Ilyas

et al. 2022

J. Electron. Mater.

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Nanomaterial-based room temperature gas sensors are used as a screening tool for diagnosing various diseases through breath analysis. The stable planar structure of boron carbide (B 4 C 3 ) is utilized as a base material for adsorption of human breath exhaled VOCs, namely formaldehyde, methanol, acetone, toluene along, with interfering gases of carbon dioxide and water. The adsorption energy, charge density, density of states, energy band gap variation, recovery time, sensitivity, and work function of adsorbed molecules on pristine B 4 C 3 are analyzed by density functional theory. The computed adsorption energies of VOC are in the range of − 0.176 to − 0.238 eV, and a larger interaction distance validate the physisorption behavior of these VOCs biomarkers on pristine boron carbide monolayer. Minute changes are determined from the electronic band structure of all adsorbed systems conserving the semiconducting nature of the B 4 C 3 monolayer. The band gap variation upon adsorption of VOCs and interfering gases is examined between 0.05 and 0.52%. The 13.63 × 10 –9 s recovery time of methanol is slower among VOCs, and 0.556 × 10 –9 s of carbon dioxide (CO 2 ) is faster for desorption. The results reveal that boron carbide can be utilized as a biosensor at room temperature for the analysis of exhaled VOCs from human breath. Graphical abstract

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“…Numerous researches have been done over the past years, aimed at lowering the sintering temperature of boron carbide [2,3,4] . The carbon addition acted as a reducing agent has a contribution to the sintering of B 4 C. Boron carbide exists over a wide composition domain that extends from stoichiometric B 4 C (20 at% C) to a sub-stoichiometric compound with 9 at% C [5] .…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Microstructure of B<sub>4</sub>C Matrix Composites by Hot-Pressing Sinter

Zhang

Gao

et al. 2011

AMR

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The sintering behavior of B4C can be significantly affected by the additions of Si. The B4C based ceramics are prepared via hot pressing. The mixtures that contained initially 15wt% Si sintered at 1830°C for 0.5h, 98.7% relative density reched. The composition and microstructure of the composites are characterized by means of XRD and SEM. Some reactions occurred during the sintering of the two powders. The products are B4C, SiB6, SiC and B sub>12.97 Si.03 C2 when B4C+15wt%Si eutectic composite sintered at 1830°C for 0.5h. The Flexural Strength and Fracture Toughness of composites reached 447.2MP and 4.62 MPa•m sup>1/2 highly be improved respectively.

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Structural and Mechanical Properties of Activated Sintered Boron Carbide-Based Materials

Cited by 23 publications

References 8 publications

Analysis of the Influence of Contaminants on Microhardness Sintered Boron Carbide Samples

Analysis of the Influence of Contaminants on Microhardness Sintered Boron Carbide Samples

First-Principles Insight into a B4C3 Monolayer as a Promising Biosensor for Exhaled Breath Analysis

Fabrication and Microstructure of B<sub>4</sub>C Matrix Composites by Hot-Pressing Sinter

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