Processing and properties of alumina–carbon nano fibre ceramic composites using standard ceramic technology

Blugan, Gurdial; Michalková, Monika; Hnatko, Miroslav; Šajgalı́k, Pavol; Minghetti, T.; Schelle, Christian; Graule, Thomas; Kuebler, Jakob

doi:10.1016/j.ceramint.2011.05.139

Cited by 11 publications

(5 citation statements)

References 27 publications

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“…However, similarly to CNTs, the results are often confusing and contradicting. Generally speaking, the addition of carbon nanofibers leads either to marginal improvement [ 118 ] or significant deterioration—by about 40% in comparison to monolithic alumina [ 119 ]—of fracture strength. Hardness and fracture toughness are degraded [ 118 ].…”

Section: Room and High-temperature Mechanical Propertiesmentioning

confidence: 99%

“…Indeed, the electric conductivity is the only physical property that is, beyond any doubt, markedly improved through the addition of CNTs. The addition of CNFs has am influence on electrical conductivity similar to that of the more expensive MWCNTs [ 119 ]. Apart from the high electric conductivity of CNTs or CNFs, an important factor contributing to the electric conductivity of a composite with electrically insulating matrix is the ability of a conductive phase to achieve percolation threshold.…”

Section: Functional Propertiesmentioning

confidence: 99%

“…Although there are some works that report increased thermal conductivity in CNT- or CNF-doped alumina-based composites ( Figure 8 ) [ 95 , 119 , 137 ], the majority of the published data indicates a decrease of thermal conductivity in comparison to monolithic alumina matrix when CNTs are added [ 129 , 138 ]. Such a decrease is understandable if the heat transport mechanism is considered.…”

Section: Functional Propertiesmentioning

confidence: 99%

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

Galusek

Galusková

2015

Nanomaterials

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The addition of SiC or TiC nanoparticles to polycrystalline alumina matrix has long been known as an efficient way of improving the mechanical properties of alumina-based ceramics, especially strength, creep, and wear resistance. Recently, new types of nano-additives, such as carbon nanotubes (CNT), carbon nanofibers (CNF), and graphene sheets have been studied in order not only to improve the mechanical properties, but also to prepare materials with added functionalities, such as thermal and electrical conductivity. This paper provides a concise review of several types of alumina-based nanocomposites, evaluating the efficiency of various preparation methods and additives in terms of their influence on the properties of composites.

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Section: Room and High-temperature Mechanical Propertiesmentioning

confidence: 99%

Section: Functional Propertiesmentioning

confidence: 99%

Section: Functional Propertiesmentioning

confidence: 99%

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

Galusek

Galusková

2015

Nanomaterials

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“…However, as the content is above 7%, the resistivity of ceramic composite decreases more slowly. It is concluded that the percolation threshold of printer toner content for the electrical conductivity of the ceramic composite is between 3.5 and 7.0%, which is much lower than the percolation threshold of graphite–ceramic composite (10–20 wt-%) [25] and carbon nano-fibre–ceramic composite (7.5–13 vol.-%) [26]. The volume resistivity of the ceramic composite is about 8.5 Ω cm at 10%, showing good electrical conductivity.…”

Section: Resultsmentioning

confidence: 99%

Electrically conductive ceramic composites prepared with printer toner as the conductive phase

Ping

Lü

et al. 2017

Advances in Applied Ceramics

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Conductive ceramic composite was prepared by sintering the mixture of clay and printer toner at 1050°C and in the N 2 atmosphere. The microstructure and mineral phases of the ceramic composite were characterised by SEM, EDX, TG and XRD, and its electrical conductivity and mechanical properties were also investigated. The results show that, in the sintering process, a series of physical and chemical reactions take place, and mineral phases with excellent electrical conductivity, such as metal iron, carbon and Fe-Al solid solution material, are formed. The electrical conductivity mechanism can be explained by the percolation theory. The threshold value for electrical conductive percolation is between 3.5 and 7.0 wt-%. At the content of printer toner 10 wt-%, the volume electrical resistance of the ceramic composite is as low as 8.5 Ω cm, and the composite exhibits excellent flexural strength higher than 14 MPa.

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“…It has been confirmed that the incorporation of CNFs into ceramic-matrix composites can strongly improve the mechanical and electrical properties [3][4][5][6][7]. However, few efforts have been achieved to obtain CNFs/ceramic composites with enhanced thermophysical properties [8].…”

Section: Introductionmentioning

confidence: 95%

Effect of interfacial structure on the thermal conductivity of carbon nanofibers reinforced aluminum nitride composites

Shi

Yang

Wang

et al. 2013

Ceramics International

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Processing and properties of alumina–carbon nano fibre ceramic composites using standard ceramic technology

Cited by 11 publications

References 27 publications

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

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

Electrically conductive ceramic composites prepared with printer toner as the conductive phase

Effect of interfacial structure on the thermal conductivity of carbon nanofibers reinforced aluminum nitride composites

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