Phase determination of ZrB2-B4C ceramic composite material using XRD and rietveld refinement analysis

Mandal, S.; Pramanick, Ayan; Chakraborty, S.; Dey, Partha Pratim

doi:10.1016/j.matpr.2020.04.124

Cited by 12 publications

(5 citation statements)

References 8 publications

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“…It is worth noting that, while pure carbide melts at about 2350°C, the ZrB2-B4C system presents a eutectic at a significantly lower temperature (just above 2200°C) [40,48]. The solidification microstructures observed in this work do not support the eutectic formation as the typical lamellas formed during solidification were only very sporadically and locally observed (Figure S6).…”

Section: Resultsmentioning

confidence: 56%

“…The patterns show the presence of only ZrB2 crystalline phase (a = b = 3.169 Å, c = 3.531 Å; α = β = 90°, γ = 120°) in good agreement with the literature, where the presence of B4C is reported to be observable by XRD only for concentrations in excess to 20 wt%. [40,48] FEM simulation was carried out to estimate whether the temperature reached during UHS could reasonably lead to B4C melting. Figure 4 shows that the maximum felt temperature and the average sample temperature, as well as the duration of the transient before reaching the temperature plateau, are affected by the considered configuration.…”

Section: Resultsmentioning

confidence: 99%

“…X-ray diffraction (XRD) was performed on polished surfaces using a Rigaku IIID Max diffractometer, equipped with Cu-Kα (λ = 1.5405 Å) X-ray source (40 kV; 30 mA). The diffraction patterns were fitted using the crystallographic data provided by Mandal et al [40] with the software package Jana2006 [41].…”

Section: Characterizationmentioning

confidence: 99%

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Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

De Bona,

Manière,

Sglavo

et al. 2024

Journal of the European Ceramic Society

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 99%

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Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

De Bona,

Manière,

Sglavo

et al. 2024

Journal of the European Ceramic Society

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“…Although no impurity phase could be detected in the XRD pattern of ZrB 2 powders, it does not mean the absence of such surface oxides. According to the literature, the surface of ZrB 2 particles is naturally covered by the ZrO 2 and B 2 O 3 ingredients, which can be detrimental to the sintering behavior of ZrB 2 [40,41]. Such impurities not only prevent from forming powerful bonding amongst the adjacent particles, but they may result in grain growth during sintering [42][43][44].…”

Section: Resultsmentioning

confidence: 99%

Beneficial effect of low BN additive on densification and mechanical properties of hot-pressed ZrB2–SiC composites

Shafagh

Jafargholinejad

Javadian³

2021

Synth. Sinter.

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The incorporation of 1 wt% hexagonal BN (hBN) into ZrB2–30 vol% SiC could noticeably better the fracture toughness, hardness, and consolidation behavior of this composite. This research intended to scrutinize the effects of various amounts of hBN (0–5 wt%) on different characteristics of ZrB2–SiC materials. The hot-pressing method under 10 MPa at 1900 °C for 120 min was employed to sinter all designed specimens. Afterward, the as-sintered samples were characterized using X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), and Vickers technique. The hBN addition up to 1 wt% improved relative density, leading to a near fully dense sample; however, the incorporation of 5 wt% of such an additive led to a composite containing more than 5% remaining porosity. The highest Vickers hardness of 23.8 GPa and fracture toughness of 5.7 MPa.m1/2 were secured for the sample introduced by only 1 wt% hBN. Ultimately, breaking large SiC grains, crack bridging, crack deflection, crack branching, and crack arresting were introduced as the chief toughening mechanisms in the ZrB2–SiC–hBN system.

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“…Thus they become toxic to the environment, hazardous to aquatic life and harmful to growing plants [ 1 ]. The dyestuffs owing to their persistent nature and high aqueous stability could become part of the food chain ultimately posing severe threats to human beings [ 2 , 3 ]. Therefore, over the last decade, the awareness of the concepts of sustainable textiles and controlled production strategy demands ideally zero emissions of contaminants from industry into the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Hydroxyethyl Cellulose Grafted with Copolymer of Polyaniline and Polypyrrole Biocomposite for Adsorption of Dyes

et al. 2022

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The emerging concepts of sustainable textiles and controlled production strategy demands ideally zero emissions of contaminants into the aquatic environment. However, the currently in-practiced conventional processes in textiles dispose of a number of contaminants especially super toxic synthetic dyes as effluents. In recent years, nanomaterials have become attractive choice for eco-friendly removal of organic dyestuff. Accordingly, this article reports synthesis and characterization of biocomposite wherein copolymer of polyaniline (PANI) and Polypyrrole (PPY) was grafted onto hydroxyethyl cellulose (HEC). Further, adsorption properties of as-prepared composite were evaluated using textile dyes Rhodamine B (RhB) and methyl Orange (MO)- as model adsorbate. The characterization of novel biocomposite (HEC/PANI-PPy) was carried out using Fourier Transform Infrared (FT-IR), Brunauer-Emmett-Teller analyzer (BET), Scanning Electron Microscope (SEM), and powder X-ray diffraction (XRD). The operational parameters such as dye initial concentration, adsorbent amount, pH and contact time were also studied to evaluate the efficiency level of the prepared biocomposite. Interestingly, the composite-mediated adsorption of RhB and MO followed pseudo-second order and the Langmuir isotherm. It is found that the adsorption capacity HEC/PANI-PPy is 30.06 and 29.3 for RhB and MO respectively. Thus, HEC/PANI-PPy is an inexpensive and highly efficient adsorbent that could be employed for could be employed for the separation and removal of toxic organic dyes from polluted textile effluents.

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Phase determination of ZrB2-B4C ceramic composite material using XRD and rietveld refinement analysis

Cited by 12 publications

References 8 publications

Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

Beneficial effect of low BN additive on densification and mechanical properties of hot-pressed ZrB2–SiC composites

Synthesis and Characterization of Hydroxyethyl Cellulose Grafted with Copolymer of Polyaniline and Polypyrrole Biocomposite for Adsorption of Dyes

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