Properties of Alumina – Graphene Oxide Composites

Broniszewski, K.; Woźniak, Jarosław; Kostecki, M.; Olszyna, A.

doi:10.1016/j.matpr.2015.04.034

Cited by 11 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Al 2 O 3 samples were lower than the available literature data. In the work of Broniszewski et al (2015) hardness of the samples from pure alumina obtained with the SPS, the technique was equal to 1664 HV [36]. Many factors influence the hardness values of the composite samples including both the manufacturing methodology and the initial materials used in the process.…”

Section: Resultsmentioning

confidence: 99%

Investigation on microstructure and selected properties of aluminum oxide–copper–nickel ceramic–metal composites

Zygmuntowicz

Kosiorek

Piotrkiewiecz

et al. 2021

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

A new ternary system of ceramic–metal composites has been fabricated from alumina, copper, and nickel powders by the slip casting method. The research aimed to avoid copper leaking during the sintering process of the formation while processing the CuNi phase. Five different compositions were examined, differing in the ratio of nickel to copper. Stable slurries with good casting properties were prepared for all compositions. The final composites after the sintering process were characterized by a homogeneous distribution of the metallic phase, but they differed in the microstructure characteristics. The addition of nickel limits the outflow of the liquid phase (copper) during sintering but does not eliminate it. This resulted in a reduction in the hardness of the samples compared to the reference material.

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation on microstructure and selected properties of aluminum oxide–copper–nickel ceramic–metal composites

Zygmuntowicz

Kosiorek

Piotrkiewiecz

et al. 2021

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…They found that the structural properties were enhanced by incorporating additional SiC content [16]. Bronizewski et al [17] developed Al 2 O 3 composites reinforced with graphene oxide using spark plasma sintering process and reported a significant cohesion between the Al 2 O 3 and graphene oxide interface. S. Jahanmir and X. Dong [18] conducted a detailed wear analysis of Al 2 O 3 and found that mechanisms such as tribo-chemical reaction, micro-fracture, plastic deformation and plowing were the major mechanisms in affecting the overall tribological characteristics.…”

Section: Introductionmentioning

confidence: 99%

Design and Development of Hybrid Al2O3 Based Composites with Toughening and Self-Lubricating Second-Phase Inclusions

et al. 2019

View full text Add to dashboard Cite

Polycrystalline ceramics, such as alumina (Al2O3), are brittle and they generally wear by fracture mechanism, which limits their potential in tribological applications. In the present work, computational design tools are used to develop hybrid Al2O3 composites reinforced with best combinations of toughening and self-lubricating second-phase particles for cutting tool inserts in dry machining applications. A mean-field homogenization approach and J-integral based fracture toughness models are employed to predict the effective structural properties (such as elastic modulus and fracture toughness) and related to the intrinsic attributes of second- phase inclusions in Al2O3 matrix. Silicon carbide (SiC), boron nitride (cBN and hBN), zirconia (ZrO2), graphite, titanium dioxide (TiO2), and titanium carbide (TiC) were found the most suitable candidates to be added in Al2O3 matrix as individual or hybrid combinations. A series of samples including standalone Al2O3, single inclusion composites (Al2O3/SiC, Al2O3/cBN) and hybrid composites (Al2O3/SiC/cBN, Al2O3/SiC/TiO2 and Al2O3/SiC/graphite) are sintered by Spark Plasma Sintering (SPS) for validation purpose. Properties of the sintered composites are measured and compared with the proposed computational material design. Composition and phase transformation of the sintered samples are studied using X-Ray diffraction (XRD) and Raman spectroscopy, while their morphology is studied using Field Emission Scanning Electron Microscope (FESEM). The presented nontraditional material design approach is found to significantly reduce experimental time and cost of materials in developing toughened and anti-friction ceramic composites.

show abstract

“…SDS has been added as a soft directing agent because of its ease of separation from final product. Currently, significant attention has been focused to synthesize GO/Al 2 O 3 nanocomposites via novel methodologies such as the dry sol−gel method 24,25 where this composite is being testified for amplified mechanical strength 26 and superior anticorrosion performance of epoxy coatings. 27 Bulk Al 2 O 3 is a wide band gap material having values of 7.0− 9.5 eV.…”

Section: Introductionmentioning

confidence: 99%

Low Cost Graphene Oxide Modified Alumina Nanocomposite as Solar Light Induced Photocatalyst

Iqbal

Shamaila

Leghari

2018

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

A new wet chemical methodology is introduced for high quality Al2O3 microflowers using aluminum foil as a cheaper precursor for the first time and sodium dodecyl sulfate as template. The gamma alumina (γ-Al2O3) is prepared with excellent catalytic properties having small crystallite size with decreased band gap in comparison to its bulk state. This can be attributed to morphological planar defects like stepped surfaces in brick morphology. Such planar defects allow electronic transitions under solar light in pure Al2O3. Moreover, a novel heterojunction of Al2O3 and graphene oxide (GO) is developed as an efficient photocatalyst under solar light. Well incorporated GO sheets within the alumina matrix have been presented in SEM images of composites. The marvelous photocatalytic performance of 15.0% GO/Al2O3 hybrid is recorded under solar light. The new composite material possesses the extended spectral response and exhibits reduce electron–hole pair recombination chances due to the incorporation of GO sheets. Furthermore, mechanism and kinetics of degradation are studied. The cost analysis is performed which shows that Al2O3 prepared by this method is 1000 times cheaper than available Al2O3 by Sigma-Aldrich. This investigation leads to economic future development of effective Al2O3 based photoactive materials for catalysis and other solar light induced energy applications.

show abstract

Properties of Alumina – Graphene Oxide Composites

Cited by 11 publications

References 11 publications

Investigation on microstructure and selected properties of aluminum oxide–copper–nickel ceramic–metal composites

Investigation on microstructure and selected properties of aluminum oxide–copper–nickel ceramic–metal composites

Design and Development of Hybrid Al2O3 Based Composites with Toughening and Self-Lubricating Second-Phase Inclusions

Low Cost Graphene Oxide Modified Alumina Nanocomposite as Solar Light Induced Photocatalyst

Contact Info

Product

Resources

About