Mechanical properties of hot-pressed Al2O3/SiC composites

Shi, Xu; Xu, Feigao; Zhang, Z.J.; Dong, Yong; Tan, Yi; Wang, L.; Yang, Jianjun

doi:10.1016/j.msea.2010.03.035

Cited by 72 publications

(39 citation statements)

References 20 publications

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“…In other works, the highest fracture toughness (7.6 MPa m 1/2 ) was achieved at 5 wt% SiC, which fits the best value obtained in this work. However, the increase of carbide content up to 20 wt% SiC reduces the K 1C to 4 MPa m 1/2 .…”

Section: Discussionsupporting

confidence: 91%

Reactive, nonreactive, and flash spark plasma sintering of Al₂O₃/SiC composites—A comparative study

et al. 2019

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The influence of different SPS‐based methods, that is, conventional spark plasma sintering (SPS), flash SPS (FSPS), and reactive SPS (RSPS) on the properties of Al2O3/SiC composite was investigated. It was shown that the application of preliminary high energy ball milling of the powders significantly enhances the sinterability of the ceramics. It was also demonstrated that FSPS provides unique conditions for rapid, that is, less than a minute, consolidation of refractory ceramics. The Al2O3‐20 wt% SiC composite produced by FSPS possesses the highest relative density (~99%), fracture toughness (7.5 MPa m1/2), hardness (20.3 GPa) and wear resistance among all ceramics produced by other SPS‐based approaches with dwelling time 10 minutes. The RSPS ceramics hold the highest Young's modulus (390 GPa). Substitution of micron‐sized Al2O3 particles by nano alumina does not lead to measurable enhancement of the mechanical properties.

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Section: Discussionsupporting

confidence: 91%

Reactive, nonreactive, and flash spark plasma sintering of Al₂O₃/SiC composites—A comparative study

et al. 2019

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“…In addition, no reaction between Al 2 O 3 and SiC occurred and this behavior was another reason for good mechanical properties of samples supported by XRD analysis. 30 …”

Section: Resultsmentioning

confidence: 99%

Influence of the vol% SiC on properties of pressureless Al₂O₃/SiC nanocomposites

Ghadami

Baharvandi

Ghadami

2015

Journal of Composite Materials

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Al 2 O 3 /SiC nanocomposites were prepared by pressureless sintering with micron-sized Al 2 O 3 powders whose average ranged 5 mm in d 50 and nano-sized SiC powders whose average ranged 80 nm in d 50 as raw materials. The combined powders were then ball-milled in iso-propanol alcohol and then, the slurry was freeze granulated. Compressed samples were prepared by cold isostatic pressing of the granules. Pressureless sintering was carried out in an argon atmosphere at 1750 C for 4 h. The physical and mechanical properties, including density, hardness and fracture toughness of specimens as well as microstructural investigations were analyzed. The results showed that by increasing vol% of SiC up to 5, hardness and fracture toughness were improved, whereas by increasing more than 5 vol% of SiC, hardness increased but fracture toughness decreased. The scanning electron microscope micrographs showed that, SiC nanoparticles inhibited the grain growth of Al 2 O 3 and reduced the matrix grain size accordingly.

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“…This can be attributed to the stability of the formed PMA-Sn complex which is pH dependent. Rivas et al [34,35] suggested that hydrogen ions would compete with metal ions to remain on the surface of polymer molecules. The competitive mechanism can be described by the following equilibrium reactions:…”

Section: Preliminary Test: Selection Of Ph and P/mmentioning

confidence: 99%

Removal of Sn2+ using copolymer of maleic acid-acrylic acid (PMA) by complexation-ultrafiltration and regeneration of PMA using shear induced dissociation and ultrafiltration

Le¹,

Qiu²,

Tang³

2019

Desalination and Water Treatment

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Commercially available polymer, the copolymer of maleic acid and acrylic acid (PMA), was used for the efficient removal of Sn 2+ from aqueous solutions by complexation-ultrafiltration. The rejection of Sn 2+ reached up to 99.3% at pH 5.0 and P/M (the mass ratio of polymer to metal ions) 5. The study was the first to examine the kinetics of complexation reactions of PMA with Sn 2+. It takes 35 min for Sn 2+ to get the complexation equilibrium, and the reaction kinetics can be described by a pseudo-first-order equation. The stability of PMA-Sn complex in the shear field was studied for the first time. The critical rotating speeds at which the PMA-Sn complex began to dissociate were 1960, 1680, 1520 rpm at pH values 5.0, 4.0, 3.0, respectively, and the corresponding critical shear rates (γ c) were calculated as 2.68 × 10 5 , 2.15 × 10 5 and 1.67 × 10 5 s-1 , respectively. Furthermore, shear induced dissociation and ultrafiltration (SIDU) were effectively applied to recover Sn 2+ and regenerate PMA. The SIDU is a promising technology for recovering tin and regenerating PMA. Compared with the traditional dissociation by acidification, SIDU avoids the use of acid and alkali, and it is in line with the idea of green chemistry.

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Mechanical properties of hot-pressed Al2O3/SiC composites

Cited by 72 publications

References 20 publications

Reactive, nonreactive, and flash spark plasma sintering of Al₂O₃/SiC composites—A comparative study

Reactive, nonreactive, and flash spark plasma sintering of Al₂O₃/SiC composites—A comparative study

Influence of the vol% SiC on properties of pressureless Al₂O₃/SiC nanocomposites

Removal of Sn2+ using copolymer of maleic acid-acrylic acid (PMA) by complexation-ultrafiltration and regeneration of PMA using shear induced dissociation and ultrafiltration

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Mechanical properties of hot-pressed Al2O3/SiC composites

Cited by 72 publications

References 20 publications

Reactive, nonreactive, and flash spark plasma sintering of Al2O3/SiC composites—A comparative study

Reactive, nonreactive, and flash spark plasma sintering of Al2O3/SiC composites—A comparative study

Influence of the vol% SiC on properties of pressureless Al2O3/SiC nanocomposites

Removal of Sn2+ using copolymer of maleic acid-acrylic acid (PMA) by complexation-ultrafiltration and regeneration of PMA using shear induced dissociation and ultrafiltration

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Product

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Reactive, nonreactive, and flash spark plasma sintering of Al₂O₃/SiC composites—A comparative study

Reactive, nonreactive, and flash spark plasma sintering of Al₂O₃/SiC composites—A comparative study

Influence of the vol% SiC on properties of pressureless Al₂O₃/SiC nanocomposites