Spark plasma sintering of multi-, single/double- and single-walled carbon nanotube-reinforced alumina composites: Is it justifiable the effort to reinforce them?

Bocanegra‐Bernal, M.H.; Domínguez-Ríos, Carlos; Echeberrı́a, J.; Reyes‐Rojas, A.; Garcia‐Reyes, A.; Aguilar-Elguézabal, A.

doi:10.1016/j.ceramint.2015.09.060

Cited by 55 publications

(12 citation statements)

References 57 publications

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“…When the uncertainty of the measurements is taken into account, however there is no actual increment in the value for Hv. Similar results were found using different matrices such as alumina [40,41] and tetragonal zirconia (3YZ) [42][43][44]. The CNT reinforcement mechanism can be disregarded for these composites.…”

Section: Consolidated Zirconia-cnt Composites Obtained By Spark Plasmsupporting

confidence: 72%

Heterocoagulation and SPS sintering of sulfonitric-treated CNT and 8YZ nanopowders

Gómez¹,

Rendtorff

Aglietti

et al. 2019

Journal of Asian Ceramic Societies

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Reinforcement of ceramic composites using carbon nanotubes (CNT) has been extensively studied for materials such as Al 2 O 3 , Si 3 N 4 and tetragonal ZrO 2. Knowledge concerning CNT composites based on a matrix of cubic zirconia (8YZ) is in short supply, however. This paper presents a study on the addition of 1 wt% CNT to an 8YZ matrix. CNT was functionalized by sulfonitric treatment at three different temperatures: 50, 90 and 130°C. To obtain strong bond between the CNT and the 8YZ particles, the composites were produced by electrostatic heterocoagulation followed by consolidation by spark plasma sintering (SPS). Dense 8YZ-CNT composites were successfully processed by the proposed route. A study of the influence of the surface treatment temperature of CNT on the final properties of ceramics is also presented. CNTs are dispersed uniformly and individually within the 8YZ matrix in 8YZ-CNT 90 and 8YZ-CNT130 composites. 8YZ-CNT50 displayed a less uniform CNT distribution and the largest grain size, suggesting that the lowest temperature acid pretreatment is less effective for the subsequent heterocoagulation mixture. The reinforcement of ceramic materials by the addition of 1 wt% CNT was confirmed by an evaluation of fracture toughness.

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Section: Consolidated Zirconia-cnt Composites Obtained By Spark Plasmsupporting

confidence: 72%

Heterocoagulation and SPS sintering of sulfonitric-treated CNT and 8YZ nanopowders

Gómez¹,

Rendtorff

Aglietti

et al. 2019

Journal of Asian Ceramic Societies

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“…Therefore, the cracks caused by processing are attracted to CNT through circumferential tension, which reinforces the composites. However, if the CNT is only embedded in grains with short lengths, it will not produce a strengthening effect [4].…”

Section: Non-chemical Combinationmentioning

confidence: 99%

“…Ceramic materials possess high hardness, stability and strength; however, their low fracture toughness and brittleness limit their applications [1]. Different from metal materials, ceramic materials have no capability to slip and produce plastic deformation at room temperature, and they are susceptible to cracks, impurities, pores, and other defects that render them brittle [2][3][4][5]. Nanocarbon materials (carbon nanotubes, graphene, graphene oxide, reduced graphene oxide, etc.)…”

Section: Introductionmentioning

confidence: 99%

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Liu

Jiang

Shi

et al. 2020

Nanotechnology Reviews

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AbstractNanocarbon materials (carbon nanotubes, graphene, graphene oxide, reduced graphene oxide, etc.) are considered the ideal toughening phase of ceramic matrix composites because of their unique structures and excellent properties. The strengthening and toughening effect of nanocarbon is attributed to several factors, such as their dispersibility in the matrix, interfacial bonding state with the matrix, and structural alteration. In this paper, the development state of nanocarbon-toughened ceramic matrix composites is reviewed based on the preparation methods and basic properties of nanocarbon-reinforced ceramic matrix composites. The assessment is implemented in terms of the influence of the interface bonding condition on the basic properties of ceramic matrix composites and the methods used to improve the interface bonding. Furthermore, the strengthening and toughening mechanisms of nanocarbon-toughened ceramic matrix composites are considered. Moreover, the key problems and perspectives of research work relating to nanocarbon-toughened ceramic matrix composites are highlighted.

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“…Similar observations have been reported by Zhang et al [31] in CNTs-Al 2 O 3 with variable CNT content and Zhang et al [32] in alumina ceramics with additions of 1, 3, and 5 vol% MWCNTs. In view of experimental evidences, such as Figure 1 [33] and Figure 2 [34], and other more reported in the scientific literature (for example Tables 1 and 2 in Ref. [18]) showing a broad spectrum of final densities and mechanical properties using different methods of purification and dispersion of CNTs into the several ceramic matrix systems, a too high CNT content must be avoided with the purpose to achieve a good dispersion by means of conventional and economic methods, since the use of sophisticated techniques can make the process expensive and its industrial scaling more difficult.…”

Section: Cnts Into the Ceramic Matrix During Sinteringmentioning

confidence: 99%

On the Performance of Carbon Nanotubes on Sintered Alumina-Zirconia Ceramics

Bocanegra‐Bernal¹,

Aguilar-Elguézabal²,

Reyes‐Rojas³

et al. 2018

Sintering Technology - Method and Application

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The alumina (Al 2 O 3) and zirconia (ZrO 2) ceramic monoliths and their combination are used in both technical and biomedical applications due to their combination of excellent chemical, physical, and mechanical properties. Pressureless sintering (PLS), reaction bonding (RB), hot pressing (HP), hot isostatic pressing (HIP), and spark plasma sintering (SPS) are the sintering methods more commonly used. The high brittleness, the low fracture toughness, and low thermal stability that possess these ceramics are its Achilles heel for numerous engineering applications. The incorporation of a second phase such as carbon nanotubes (CNTs) into the ceramic matrix has been attempted to overcome these drawbacks but the obtained results are still controversial considering that the homogeneous dispersion of CNTs and the interfacial bonding between two different ceramic materials remains as a difficult task leading to little or even no improvement in mechanical properties. Besides, the role of CNTs in the sintering of ceramic materials is not clear in the scientific literature taking into account parameters such as materials used and particularly inconsistencies in dispersion and mixing of the CNTs. We discuss how the CNTs can affect the sintering behavior and microstructural evolution of alumina and zirconia ceramics and the combination of them.

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Spark plasma sintering of multi-, single/double- and single-walled carbon nanotube-reinforced alumina composites: Is it justifiable the effort to reinforce them?

Cited by 55 publications

References 57 publications

Heterocoagulation and SPS sintering of sulfonitric-treated CNT and 8YZ nanopowders

Heterocoagulation and SPS sintering of sulfonitric-treated CNT and 8YZ nanopowders

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

On the Performance of Carbon Nanotubes on Sintered Alumina-Zirconia Ceramics

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