Microstructure and mechanical properties of alumina ceramics reinforced by boron nitride nanotubes

Wang, Weili; Bi, Jianqiang; Wang, Shouren; Sun, Kangning; Du, Mingrui; Long, Na-Na; Bai, Yu‐Jun

doi:10.1016/j.jeurceramsoc.2011.05.042

Cited by 52 publications

(23 citation statements)

References 48 publications

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“…Previous investigations have revealed that the mechanical properties (including toughness and bending strength) of ceramics (i.e. HA [17], Al 2 O 3 [20] and ZrO 2 [21]) improve greatly when reinforced with BNNTs. To the best of our knowledge, few investigations has been made into BNNT/(ZrB 2 -SiC) composites.…”

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confidence: 99%

Fracture toughness and toughening mechanisms in a (ZrB2–SiC) composite reinforced with boron nitride nanotubes and boron nitride nanoplatelets

et al. 2013

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A ZrB 2-SiC composite reinforced with the mixture of boron nitride nanotubes (BNNTs) and boron nitride nanoplatelets (BNNPs) was prepared by spark plasma sintering. The results show that the fracture toughness of a (ZrB 2-SiC) composite increases by up to $24.4% at 1.0% (BNNT-BNNP) weight fraction. The synergetic toughening mechanisms, including BNNT and BNNP pullout, crack bridging by BNNP, crack branching and crack deflection, and bending of multilayered BNNPs, are observed to contribute to the improved toughness.

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Fracture toughness and toughening mechanisms in a (ZrB2–SiC) composite reinforced with boron nitride nanotubes and boron nitride nanoplatelets

et al. 2013

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“…It can be seen from Fig. 4(c [14,[22][23][24]. However, with the further increase of the BNNTs content, the agglomeration of the nanotubes continued to increase, which caused the pores around the nanotubes to increase, which easily induced crack propagation and reduced the toughness of the composite material.…”

Section: Preparation Of Bnnts/b 4 C Composite Ceramicsmentioning

confidence: 99%

Fabrication and Mechanical Properties of Boron Nitride Nanotube Reinforced Boron Carbide Ceramics

Liu

et al. 2020

Preprint

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A series of BNNTs/B4C composite ceramic were prepared by the spark plasma sintering (SPS) technology using boron carbide (B4C) powders as the matrix and boron nitride nanotubes (BNNTs) as the toughening phase. The XRD, SEM, TEM and HR-TEM were used to characterize the B4C samples. The influence of sintering temperature, BNNTs content and matrix particle size on the microstructures and mechanical properties of B4C composite ceramics, as well the toughening mechanism were investigated in detail. The experimental results showed that changing the particle size of the powder, increasing the sintering temperature and adding BNNTs could significantly improve the mechanical properties of the material. The ceramic samples obtained by adding 5wt.% BNNTs content sintered at 1750℃ displayed the best mechanical properties. Its relative density, microhardness and fracture toughness respectively were 99.41%, 32.68 GPa and 6.87 Mpa·m1/2, respectively. In particular, the fracture toughness value of the BNNTs/B4C composite ceramic was 54.59% higher than that of B4C ceramics without BNNTs.

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“…The most popular theory is the nanotubes pulling out, breaking and bridging effects [19], which are the accepted strengthening and toughening mechanisms of fibers. In this paper, several reasons are proposed to explain the strengthening and toughening mechanisms of BNNTs.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Microstructure and properties of SiO2 matrix reinforced by BN nanotubes and nanoparticles

Du¹,

Bi²,

Sun³

et al. 2011

Journal of Alloys and Compounds

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Microstructure and mechanical properties of alumina ceramics reinforced by boron nitride nanotubes

Cited by 52 publications

References 48 publications

Fracture toughness and toughening mechanisms in a (ZrB2–SiC) composite reinforced with boron nitride nanotubes and boron nitride nanoplatelets

Fracture toughness and toughening mechanisms in a (ZrB2–SiC) composite reinforced with boron nitride nanotubes and boron nitride nanoplatelets

Fabrication and Mechanical Properties of Boron Nitride Nanotube Reinforced Boron Carbide Ceramics

Microstructure and properties of SiO2 matrix reinforced by BN nanotubes and nanoparticles

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