Study on mechanical properties of hot pressing sintered mullite-ZrO2 composites with finite element method

Yu, Hui; Chen, Yongjun; Guo, Xiaodong; Luo, Lijie; Li, Wei; Xu, Zhichao; Li, Tianfeng; Wu, Gaolong

doi:10.1016/j.ceramint.2018.01.146

Cited by 16 publications

(8 citation statements)

References 27 publications

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“…Mullite is the only stable binary phase in the Al 2 O 3 –SiO 2 system at atmospheric pressure, and it is often present in the form of 3Al 2 O 3 ⋅2SiO 2 . Mullite ceramics are promising materials for industrial applications due to their excellent infrared transmission properties, good dielectric properties and thermal stability in high-temperature environments (Schneider et al , 2008; Yu et al , 2018; Li et al , 2021; Romero et al , 2021). In addition, mullite is also a critical matrix material for ceramic-based composites (Li et al , 2017).…”

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confidence: 99%

Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

et al. 2022

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confidence: 99%

Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

et al. 2022

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“…After that, the specimens were machined into height × width × length = 3.0 mm × 4.0 mm × 36.0 mm for flexural strength test (International Organization for Standardization, ISO 14704:2000) and 4.0 mm × 2.0 mm × 25.0 mm for fracture toughness test (American Society for Testing and Materials, ASTM E399), respectively 29,30 . In addition, in order to reduce the residual stress and improve the accuracy of measurement, the four long edges of the specimens were uniformly chamfered 31,32 …”

Section: Methodsmentioning

confidence: 99%

Preparation, mechanical properties, and toughening mechanisms of SiCw/SiCp‐reinforced zirconia‐toughened alumina ceramics

Liu

Chen

et al. 2020

Int J Applied Ceramic Tech

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Zirconia‐toughened alumina (ZTA) ceramics with high mechanical properties were sintered by hot‐pressing method using SiC particles (SiCp) and SiC whiskers (SiCw) as the reinforcing agents simultaneously. The influences of sintering temperature, SiCp, and SiCw contents on the microstructure and mechanical properties of ZTA ceramics were investigated. It was found that both SiCp and SiCw could contribute to grain refinement significantly and promote the mechanical properties of the ceramics. However, the excess addition of SiCp or SiCw led to the formation of pores with large sizes and degraded the mechanical properties instead. When 13 wt% SiCp was introduced, the maximum flexural strength of 1180.0 MPa and fracture toughness of 15.9 MPa·m1/2 were obtained, whereas the maximum flexural strength of 1314.0 MPa and fracture toughness of 14.7 MPa·m1/2 were achieved at 20 wt% SiCw. Interestingly, the simultaneous addition of SiCp and SiCw could further improve the mechanical properties, and the highest flexural strength of 1334.0 MPa and fracture toughness of 16.0 MPa·m1/2 were achieved at a SiCw/SiCp ratio of 16/4. The reinforcement mechanisms in the ceramics mainly included the phase transformation toughening of ZrO2, the crack deflection and bridging of SiCp and SiCw, and the pull‐out of SiCw.

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“…9. As shown, the t-ZrO 2 in YSZ particles could react with SiO 2 in mullite grains to generate the intermediate product of zircon; followed by a decomposing reaction, the particles of m-ZrO 2 , SiO 2 , and Al 2 O 3 were derived [34,35]. The obtained SiO 2 and Al 2 O 3 have smaller sizes and could be reassembled to interconnect with the dispersed mullite grains in a similar manner to the SMP additive, so the corresponding porosity exhibited a similar trend versus the content to that doped with SMP.…”

Section: Mechanism Explanationmentioning

confidence: 95%

Preparation of hollow fiber membranes from mullite particles with aid of sintering additives

Lee

Liu

Zhou³

et al. 2020

J Adv Ceram

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Porous mullite hollow fiber membranes were prepared with a combined phase-inversion and sintering method, using three sintering additives including yttrium stabilized zirconia (YSZ), small mullite particles (SMP), and titanium oxide (TiO2) to promote the particle sintering. The results indicated that all the three additives could improve the sintering performance of mullite hollow fiber membranes due to the decrease in activation energy of mullite grains. Both YSZ and TiO2 could react with mullite grains to generate composite oxides (e.g., ZrSiO4 and Al2TiO5) during sintering, following a reaction-sintering mechanism. Interestingly, the newly generated ZrSiO4 was instable and further decomposed into monoclinic ZrO2 and SiO2 in the sintering process. The decomposition could avoid excessive embedment of composite oxides among mullite grains which have negative impact on mechanical strength of mullite hollow fibers. Overall, the doping of YSZ provided a better promotion effect on the sintering of mullite hollow fiber membranes, where the microstructural and mechanical properties are insensitive to the doping content and sintering temperatures, so it could be used as the candidate for the large-scale preparation of mullite hollow fibers.

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Study on mechanical properties of hot pressing sintered mullite-ZrO2 composites with finite element method

Cited by 16 publications

References 27 publications

Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

Preparation, mechanical properties, and toughening mechanisms of SiCw/SiCp‐reinforced zirconia‐toughened alumina ceramics

Preparation of hollow fiber membranes from mullite particles with aid of sintering additives

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