Static compressibility, thermal expansion and elastic anisotropy of single crystals

Fu, Heng Zhi; Yang, Jing; Zhao, Zhiguo; Feng, Peng; Liu, WenFang; Gao, Tao

doi:10.1016/j.ssc.2009.07.054

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…Elemental compositions of the thermally-treated microspheres were determined mainly using NAA and supplemented with O microanalysis ( [49][50][51][52][53][54][55][56][57]. Interestingly, the Zr-to-S molar ratios calculated from the compositional data above, ranged from 0.9 to 1.3; less than the 2:1…”

Section: Composition and Chemical Structurementioning

confidence: 99%

Porous Zr2SC-carbon composite microspheres: Possible radiation tolerant sorbents and transmutation hosts for technetium-99

Scales

Aughterson

Karatchevtseva

et al. 2018

Microporous and Mesoporous Materials

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The preparation, characteristics and adsorption properties of novel porous carbon-ceramic composite microspheres are presented. The composites were synthesised by a simple ion exchange process involving the cationic Zr tetramer and commonly-available macroporous sulphonated polystyrenedivinylbenzene cation exchange resins, with subsequent carbothermal reduction at 1350 °C. The materials were extensively characterised with respect to composition, chemical structure and porosity. Carbothermal reduction of the Zr-loaded templates resulted in formation of crystallites of the MAX phase zirconium sulphide carbide (Zr 2 SC) embedded within a highly microporous carbon framework with a macroporous secondary structure inherited from the resin template. Despite the high BET surface areas of the Zr 2 SC-carbon composite microspheres (in some cases, greater than 600 m 2 g −1), they are extremely mechanically robust. The microspheres displayed high adsorption selectivity for oxoanions relative to cationic solution species, including perrhenate (ReO 4 −), a pertechnetate (TcO 4 −) surrogate. Accumulation of ReO 4 − on the Zr 2 SC particles was unequivocally demonstrated by elemental mapping. Such materials are potential candidates as combined 99 Tc sorbents and reusable transmutation hosts.

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Section: Composition and Chemical Structurementioning

confidence: 99%

Porous Zr2SC-carbon composite microspheres: Possible radiation tolerant sorbents and transmutation hosts for technetium-99

Scales

Aughterson

Karatchevtseva

et al. 2018

Microporous and Mesoporous Materials

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“…M n+1 AX n phase (n = 1-3) is a kind of ternary layered compounds, in which the M element is the early transition metal, the A element is the main group element (12)(13)(14)(15)(16) and the X element is B, C or N. MAX phase was first proposed by Nowotny et al [1] in the 1960s. Barsoum et al [2] synthesized the bulk Ti 3 SiC 2 ceramics through hot pressing and reported on a range of unique properties including high thermal conductivity, high flexural strength, high fracture toughness, excellent machinability and etcetera.…”

Section: Introductionmentioning

confidence: 99%

“…Chakrabotry et al [7] simulated the properties of V 2 AlC/V 2 AlB and judged that the introduction of boron can effectively enhance the ductility. At present, there are mature studies on the synthesis, characterization and calculation of M 2 SC (M = Ti, Zr, Nb, Hf) [11][12][13][14][15][16][17][18][19][20][21]. Based on the research on M 2 SC, Ali et al [22] simulated the lattice structure and physical properties of M 2 SC and M 2 SB (M = Zr, Hf, Nb), identified that M 2 SB phases have dynamical stability and revealed the application prospect of Zr 2 SB in reducing solar absorption coating.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Property Characterization of Ternary Laminar Zr2SB Ceramic

Zhang

Wan

et al. 2021

Preprint

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In this paper, Zr2SB ceramics with high relative density (99.03%) and high purity of 82.95 wt% (containing 8.96 wt% ZrB2 and 8.09 wt% zirconium) were successfully synthesized from ZrH2, sublimated sulfur and boron powder by spark plasma sintering at 1300 ℃. The reaction mechanism, microstructures, physical properties and mechanical properties of Zr2SB ceramic were systematically studied. The results show that Zr2SB was obtained by the reaction of zirconium sulfide, zirconium and boron, and ZrB2 coexisted in the sample as a symbiotic impurity phase. The average grain size of Zr2SB was 12.46 μm in length and 5.12 μm in width, and the mean grain sizes of ZrB2 and zirconium impurities were about 300 nm. In terms of physical properties, the measured thermal expansion coefficient was 7.64 × 10-6 K-1 from room temperature to 1200 ℃, and the thermal capacity and thermal conductivity at room temperature were 0.39 J·g−1·K−1 and 12.01 W∙m−1∙K−1, respectively. The room temperature electrical conductivity of Zr2SB ceramic was measured to be 1.74 × 106 Ω−1∙m−1. In terms of mechanical properties, Vickers hardness was 9.86 ± 0.63 GPa under 200 N load, and the measured flexural strength, fracture toughness and compressive strength were 269 ± 12.7 MPa, 3.94 ± 0.63 MPa·m1/2, and 2166.74 ± 291.34 MPa, respectively.

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“…1 Introduction  M n+1 AX n (MAX) phase (n = 1-3) is a kind of ternary layered compounds, in which the M element is the early transition metal, the A element is the main group element (12)(13)(14)(15)(16), and the X element is B, C, or N. MAX phase was first proposed by Jeitschko et al [1] in the 1960s. Barsoum [2] synthesized the bulk Ti 3 SiC 2 ceramics through hot pressing and reported on a range of unique properties including high thermal conductivity, high flexural strength, high fracture toughness, excellent machinability, etc.…”

mentioning

confidence: 99%

“…Chakrabotry et al [7] simulated the properties of V 2 AlC-V 2 AlB and judged that the introduction of boron can effectively enhance the ductility. At present, there are mature studies on the synthesis, characterization, and calculation of M 2 SC (M = Ti, Zr, Nb, Hf) [11][12][13][14][15][16][17][18][19][20][21]. Based on the research of M 2 SC, Ali et al [22] simulated the lattice structure and physical properties of M 2 SC and M 2 SB (M = Zr, Hf, Nb), identified that M 2 SB phases have dynamical stability, and revealed the application prospect of Zr 2 SB in reducing solar absorption coating.…”

mentioning

confidence: 99%

Synthesis and property characterization of ternary laminar Zr2SB ceramic

Zhang

Wan

et al. 2022

J Adv Ceram

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In this paper, Zr2SB ceramic with purity of 82.95 wt% (containing 8.96 wt% ZrB2 and 8.09 wt% zirconium) and high relative density (99.03%) was successfully synthesized from ZrH2, sublimated sulfur, and boron powders by spark plasma sintering (SPS) at 1300 °C. The reaction process, microstructure, and physical and mechanical properties of Zr2SB ceramic were systematically studied. The results show that the optimum molar ratio to synthesize Zr2SB is n(ZrH2):n(S):n(B) = 1.4:1.6:0.7. The average grain size of Zr2SB is 12.46 µm in length and 5.12 µm in width, and the mean grain sizes of ZrB2 and zirconium impurities are about 300 nm. In terms of physical properties, the measured thermal expansion coefficient (TEC) is 7.64×10−6 K−1 from room temperature to 1200 °C, and the thermal capacity and thermal conductivity at room temperature are 0.39 J·g−1·K−1 and 12.01 W·m−1·K−1, respectively. The room temperature electrical conductivity of Zr2SB ceramic is measured to be 1.74×106 Ω−1·m−1. In terms of mechanical properties, Vickers hardness is 9.86±0.63 GPa under 200 N load, and the measured flexural strength, fracture toughness, and compressive strength are 269±12.7 MPa, 3.94±0.63 MPa·m1/2, and 2166.74±291.34 MPa, respectively.

show abstract

Static compressibility, thermal expansion and elastic anisotropy of single crystals

Cited by 12 publications

References 24 publications

Porous Zr2SC-carbon composite microspheres: Possible radiation tolerant sorbents and transmutation hosts for technetium-99

Porous Zr2SC-carbon composite microspheres: Possible radiation tolerant sorbents and transmutation hosts for technetium-99

Synthesis and Property Characterization of Ternary Laminar Zr2SB Ceramic

Synthesis and property characterization of ternary laminar Zr2SB ceramic

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