Dependence of Al Doping on the in-Situ Reactive Preparation and Mechanical Properties of Ti3SiC2/Al2O3 Composites

Wang, Xuye; Qi, Fugang; Wang, Zhi; Zhang, Zhenyu; Li, Qinggang; Wu, Jianhua; Shi, Guopu

doi:10.30919/esmm5f467

Cited by 5 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With CAS, the composite sintered at a low temperature displayed a low porosity. The apparent porosity of the CAS sample (sintered at 1200 ℃ ) was close to that of the Ti 3 SiC 2 /Al 2 O 3 composites fabricated by HP at 1450 ℃ [2, 3,4] or SPS at approximately 1300-1350 ℃ [5,6]. The reduction in sintering temperature may also be attributed to the use of amorphous SiO as a raw material.…”

Section: Densities Porosities Flexural Strengths and Hardness Of The ...supporting

confidence: 52%

“…Ti 3 AlC 2 (4.25 g/cm3 [33,34]), Ti 3 SiC 2 (4.53 g/cm3 [35]), and Al 2 O 3 (approximately 3.95 g/cm 3[36]), the density of the HP sample was abnormally low, so this was possibly caused by closed pores. Most pores were observed in Al 2 O 3 (Fig.2).…”

mentioning

confidence: 99%

“…The in situ syntheses were used to fabricate Ti 3 SiC 2 /Al 2 O 3 composites, but they require high sintering temperatures and typically result in impurities [2,3,5,6,14,23]. If Al 2 O 3 can grow directly on the surface of the MAX phase grains at low temperatures, the temperatures required to sinter the composites can be reduced, and the protective effect of Al 2 O 3 may be maintained.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Formation mechanisms of Ti ₃(Si,Al)C ₂/Al ₂O ₃ composites from Ti ₃AlC ₂ and SiO via low-temperature sintering

ZHANG¹,

LI²,

Ji³

et al. 2023

Journal of Advanced Ceramics

View full text Add to dashboard Cite

Ti 3 SiC 2 /Al 2 O 3 composites have attracted attention due to their excellent mechanical and electromagnetic properties, but the high temperatures (≥ 1400 ℃) required for the densification of aluminum oxide (Al 2 O 3 ) leads to the decomposition of Ti 3 SiC 2 . To address this issue, Ti 3 (Si x Al 1−x )C 2 /Al 2 O 3 (x represents the Si content) composites were synthesized for the first time via hot-pressing (HP) sintering and current-assisted sintering (CAS) of mixed Ti 3 AlC 2 and silicon monoxide (SiO) powders at 1300 and 1200 ℃, respectively. Both approaches produced composites with x values greater than 0.9, indicating that the compositions of the prepared composites were similar to those of Ti 3 SiC 2 /Al 2 O 3 composites. The synthetic mechanism involved substitution and continuous interdiffusion of Al and Si atoms. The composite prepared by CAS at 1200 ℃ was compacted, whereas the composite prepared by HP had a low density. The low-temperature densification mechanism is attributed to the combined effects of amorphous SiO, liquid Al, and the high heating rates for CAS. The flexural strength and hardness of the composite prepared by CAS were also comparable to those of compacted Ti 3 SiC 2 /Al 2 O 3 composites.

show abstract

Section: Densities Porosities Flexural Strengths and Hardness Of The ...supporting

confidence: 52%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Formation mechanisms of Ti ₃(Si,Al)C ₂/Al ₂O ₃ composites from Ti ₃AlC ₂ and SiO via low-temperature sintering

ZHANG¹,

LI²,

Ji³

et al. 2023

Journal of Advanced Ceramics

View full text Add to dashboard Cite

show abstract

Thermo-mechanical and opto-electrical study of Cr-doped-ZnO-based polyvinyl chloride nanocomposites

Ahmed

El-Fattah

Anad

et al. 2023

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Polymer nanocomposites exhibit unique physical properties inaccessible from their individual constituents, which are tunable through the type of the polymer matrix, the type and size of the incorporated nanoparticles, and the doping level, and therefore, can be utilized in a wide range of potential applications. Here, we report the fabrication of pure Polyvinyl chloride (PVC) and PVC-based nanocomposites containing different loadings of pure and Cr-doped ZnO nanoparticles, using solvent casting method. Scanning electron microscopy images of the obtained nanocomposite films confirmed the successful incorporation of nanoparticles within the PVC matrix, with higher dispersion quality for the Cr-doped ZnO samples. The prepared nanocomposite samples were found to possess higher thermo-mechanical stability, compared to pure PVC, resulting from the strong interaction between the nanoparticles and polymeric chains, as inferred from their thermogravimetric and dynamic mechanical analysis (TGA and DMA) profiles. Specifically, the temperatures corresponding to the onset and 50% weight loss as well as the glass transition temperature are increased by ~ 88, ~ 34, and ~ 16 °C, respectively, after loading selected amounts of the nanoparticles. In addition to the thermo-mechanical stability, the nanocomposites revealed potentially relevant dielectric response, where the dielectric permittivity exhibits remarkable enhancement, by 400%, compared to pristine PVC. The optical transmission of the PVC is strongly suppressed over the entire visible spectral regime, upon loading the nanoparticles, and its optical band gap (~ 4.1 eV) is red shifted toward the value of pristine ZnO nanoparticles (~ 3.3 eV), while the distinct Cr3+ and Cr6+ optical transitions are preserved for the nanocomposites. The obtained thermo-mechanical stability, required for working devices, together with the here reported improvements in the dielectric response for the nanocomposite samples may alter the typical applications of PVC polymers from being insulating materials to be utilized in energy storage and capacitors manufacture, while the preserved optical properties of the incorporated nanoparticles render these nanocomposites suitable candidates for optoelectronic devices.

show abstract

Research progress on electromagnetic wave absorption based on magnetic metal oxides and their composites

Wang,

Zhang,

Zhao

et al. 2023

Adv Compos Hybrid Mater

View full text Add to dashboard Cite

Dependence of Al Doping on the in-Situ Reactive Preparation and Mechanical Properties of Ti3SiC2/Al2O3 Composites

Cited by 5 publications

References 0 publications

Formation mechanisms of Ti ₃(Si,Al)C ₂/Al ₂O ₃ composites from Ti ₃AlC ₂ and SiO via low-temperature sintering

Formation mechanisms of Ti ₃(Si,Al)C ₂/Al ₂O ₃ composites from Ti ₃AlC ₂ and SiO via low-temperature sintering

Thermo-mechanical and opto-electrical study of Cr-doped-ZnO-based polyvinyl chloride nanocomposites

Research progress on electromagnetic wave absorption based on magnetic metal oxides and their composites

Contact Info

Product

Resources

About

Dependence of Al Doping on the in-Situ Reactive Preparation and Mechanical Properties of Ti3SiC2/Al2O3 Composites

Cited by 5 publications

References 0 publications

Formation mechanisms of Ti 3(Si,Al)C 2/Al 2O 3 composites from Ti 3AlC 2 and SiO via low-temperature sintering

Formation mechanisms of Ti 3(Si,Al)C 2/Al 2O 3 composites from Ti 3AlC 2 and SiO via low-temperature sintering

Thermo-mechanical and opto-electrical study of Cr-doped-ZnO-based polyvinyl chloride nanocomposites

Research progress on electromagnetic wave absorption based on magnetic metal oxides and their composites

Contact Info

Product

Resources

About

Formation mechanisms of Ti ₃(Si,Al)C ₂/Al ₂O ₃ composites from Ti ₃AlC ₂ and SiO via low-temperature sintering

Formation mechanisms of Ti ₃(Si,Al)C ₂/Al ₂O ₃ composites from Ti ₃AlC ₂ and SiO via low-temperature sintering