Alumina Matrix Composites with Non-Oxide Nanoparticle Addition and Enhanced Functionalities

Galusek, Dušan; Galusková, Dagmar

doi:10.3390/nano5010115

Cited by 31 publications

(12 citation statements)

References 139 publications

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“…In built software of potentiostat, DC105, was used to interpret the Tafel region of potentiodynamic curves and to determine the values of corrosion potential (E corr ), corrosion current (i corr ), and corrosion rate. This reduction in grain size, also reported by Saheb and Khwaja 45 , is primarily due to the pinning effect of the reinforcements, which restricts the grain boundary motion during densification 11 . The mode of fracture changed from intergranular for pure alumina to intragranular for Al 2 O 3 -5SiC-2CNT nanocomposite.…”

Section: Methodssupporting

confidence: 70%

“…Lower fracture toughness is the only restraint 1,9 , restricting the use of alumina in wide range of applications. In order to overcome this limitation, micro/nano sized reinforcements such as CNT, CNF, SiC, and graphene are added to alumina matrix [10][11][12] , resulting in the formation of nanocomposites with improved fracture toughness 13 . Recently, further enhancements in properties of alumina were made possible through the hybrid microstructural design 14 , by reinforcing alumina with two reinforcements simultaneously.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

et al. 2020

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The use of ceramic-based materials has become more common in many applications because of their unique characteristics and properties. Design of alumina hybrid nanocomposites achieved by incorporating two nanoreinforcements, with different morphologies and/or attributes, such as CNTs and SiC, is a new approach that has been adopted to enhance the properties of alumina. The microstructural, mechanical, electrical, and thermal properties of Al 2 O 3-SiC-CNT hybrid nanocomposites were investigated and reported in the literature. However, the corrosion behavior was not considered. The present paper reports the electrochemical corrosion behavior of pure Al 2 O 3 and Al 2 O 3-5SiC-2CNT hybrid nanocomposite in acidic (2.34M HCl) and alkaline (6.5M NaOH) environments at room temperature. Ball milling (BM) and spark plasma sintering (SPS) were used for preparation of samples. The microstructure of sintered samples was investigated through field emission scanning electron microscopy (FE-SEM). Potentiodynamic polarization (PDP) technique was used to investigate the corrosion behavior. The corrosion rate of the Al 2 O 3-5SiC-2CNT nanocomposite increased 96 and 178% in HCl and NaOH solution, respectively, compared to alumina. Possible corrosion mechanisms and factors effecting corrosion were discussed.

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Section: Methodssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

et al. 2020

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“…In particular, compressive residual stresses are created at the Al 2 O 3 /SiC interfaces (see Figure 9 b ), giving rise to stronger particle/matrix bonding as respect to matrix/matrix ( i.e. , Al 2 O 3 / Al 2 O 3 ) bonding [ 96 ]. Furthermore, intergranular SiC particles exert a pinning effect on the Al 2 O 3 grain boundary, inhibiting the grain boundary sliding and thus increasing the creep resistance [ 97 ].…”

Section: Why Nanocomposites Ceramics?mentioning

confidence: 99%

Structural Ceramic Nanocomposites: A Review of Properties and Powders’ Synthesis Methods

Palmero

2015

Nanomaterials

233

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Ceramic nanocomposites are attracting growing interest, thanks to new processing methods enabling these materials to go from the research laboratory scale to the commercial level. Today, many different types of nanocomposite structures are proposed in the literature; however, to fully exploit their exceptional properties, a deep understanding of the materials’ behavior across length scales is necessary. In fact, knowing how the nanoscale structure influences the bulk properties enables the design of increasingly performing composite materials. A further key point is the ability of tailoring the desired nanostructured features in the sintered composites, a challenging issue requiring a careful control of all stages of manufacturing, from powder synthesis to sintering. This review is divided into four parts. In the first, classification and general issues of nanostructured ceramics are reported. The second provides basic structure–property relations, highlighting the grain-size dependence of the materials properties. The third describes the role of nanocrystalline second-phases on the mechanical properties of ordinary grain sized ceramics. Finally, the fourth part revises the mainly used synthesis routes to produce nanocomposite ceramic powders, underlining when possible the critical role of the synthesis method on the control of microstructure and properties of the sintered ceramics.

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“…Comprehensive review papers on the synthesis, processing, microstructure, properties, and performance of ceramic matrix composites, including alumina nanocomposites reinforced by SiC, ZrO 2 , CNTs, and graphene, were published [6,11,29,30,31]. Palmero et al addressed critical issues related to the processing and properties of nanocomposite ceramics, particularly Al 2 O 3 based composites [29].…”

Section: Introductionmentioning

confidence: 99%

“…Ahmad et al summarized advances, difficulties, and potential applications of carbon nanotube and graphene reinforced ceramic nanocomposites [11]. Galusek and Galusková [30] evaluated the influence of synthesis methods and additives on the properties of alumina-based nanocomposites. Estili and Sakka critically review the role of carbon nanotubes (CNTs) along with strengthening and toughening mechanisms, in ceramic nanocomposites [31].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances and Future Prospects in Spark Plasma Sintered Alumina Hybrid Nanocomposites

2019

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Although ceramics have many advantages when compared to metals in specific applications, they could be more widely applied if their low properties (fracture toughness, strength, and electrical and thermal conductivities) are improved. Reinforcing ceramics by two nano-phases that have different morphologies and/or properties, called the hybrid microstructure design, has been implemented to develop hybrid ceramic nanocomposites with tailored nanostructures, improved mechanical properties, and enhanced functionalities. The use of the novel spark plasma sintering (SPS) process allowed for the sintering of hybrid ceramic nanocomposite materials to maintain high relative density while also preserving the small grain size of the matrix. As a result, hybrid nanocomposite materials that have better mechanical and functional properties than those of either conventional composites or nanocomposites were produced. The development of hybrid ceramic nanocomposites is in its early stage and it is expected to continue attracting the interest of the scientific community. In the present paper, the progress made in the development of alumina hybrid nanocomposites, using spark plasma sintering, and their properties are reviewed. In addition, the current challenges and potential applications are highlighted. Finally, future prospects for developing alumina hybrid nanocomposites that have better performance are set.

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Alumina Matrix Composites with Non-Oxide Nanoparticle Addition and Enhanced Functionalities

Cited by 31 publications

References 139 publications

Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

Structural Ceramic Nanocomposites: A Review of Properties and Powders’ Synthesis Methods

Recent Advances and Future Prospects in Spark Plasma Sintered Alumina Hybrid Nanocomposites

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