Microstructure and property enhancement of silicon nitride-barium aluminum silicate composites with β-Si3N4 seed addition

Wang, Bo; Yang, Jun; Guo, Rui; Gao, Jiyun; Yang, Jianjun

doi:10.1007/s10853-008-3009-z

Cited by 21 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is known that the so-called in-situ growth is to make some grains grow into elongated grains with high aspect ratio by controlling the sintering process, thus obtaining the microstructure similar to that of ber or whisker reinforced composites [37]. This microstructure with a bimodal grain size distribution can play a good role in de ection and bridging cracks to improve the fracture toughness and strength of materials, while basically not affecting other properties [38,39].…”

Section: Introductionmentioning

confidence: 99%

Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

Zhao

Lian

Qin

et al. 2020

Preprint

View full text Add to dashboard Cite

Self-reinforced lithium disilicate (Li 2 Si 2 O 5 ) glass-ceramics were hot pressing sintered by introducing 5 wt% Li 2 Si 2 O 5 crystal seeds into two different glass systems. The results show that the seeds play an important role in the crystallization inducement, microstructural and properties improvement of the glass, especially for the glass powder without the nucleating agent of P 2 O 5 . The microstructure features a wider bimodal grain size distribution with large rod-like crystals epitaxially grown along the seeds and small crystals nucleated from the glass powder itself, contributes to the improvement of the performance especially the fracture toughness. The 4C5S specimen exhibited the best comprehensive properties with a good flexural strength (396 ± 7 MPa), improved fracture toughness (3.31 ± 0.19 MPa·m 1/2 ) and comparable translucency as IPS e.max. This research will provide a new idea and method for the perfect matching of the fracture toughness and the aesthetic appearance of lithium disilicate glass-ceramics, and lay the foundation for its clinical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

Zhao

Lian

Qin

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…It is known that the socalled in-situ growth is to make some grains grow into elongated grains with high aspect ratio by controlling the sintering process, thus obtaining the microstructure similar to that of ber or whisker reinforced composites [39]. This microstructure with a bimodal grain size distribution can play a good role in de ection and bridging cracks to improve the fracture toughness and strength of materials, while basically not affecting other properties [40,41].…”

Section: Introductionmentioning

confidence: 99%

Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

Zhao

Lian

Qin

et al. 2020

Preprint

View full text Add to dashboard Cite

Self-reinforced lithium disilicate (Li2Si2O5, LD) glass-ceramics were hot pressing sintered by introducing 5 wt% Li2Si2O5 crystal seeds into two different glass compositions of SiO2-Li2O-P2O5-ZrO2-Al2O3-K2O-La2O3 (7C LD) and SiO2-Li2O-K2O-La2O3 (4C LD). The results show that the seeds play an important role in the crystallization inducement, microstructural and properties improvement of the glass, especially for the glass powder without the nucleating agent of P2O5. The microstructure features a wider bimodal grain size distribution with large rod-like crystals epitaxially grown along the seeds and small crystals nucleated from the glass powder itself, contributes to the improvement of the performance especially the fracture toughness. The specimen of 4C LD glass with the addition of 5 wt.% Li2Si2O5 seeds exhibited the best comprehensive properties with a good flexural strength (396 ± 7 MPa), improved fracture toughness (3.31 ± 0.19 MPa·m1/2) and comparable translucency as IPS e.max. This research will provide a new idea and method for the improvement of the fracture toughness of lithium disilicate glass-ceramics without affecting its aesthetic appearance, and lay the foundation for its clinical applications.

show abstract

“…Silicon nitride (Si 3 N 4 ) due to its strong thermal, dielectric and structural properties is mostly used in electronic, optical and industrial applications [1,2]. Thanks to its thermal insulation properties, silicon nitride is used in many industrial fields such as areas of heat conduction, gas turbines, and automobile engines, at the same time it is widely used as a passivation layer in transistor applications, light emitting diodes (LEDs) and solar cells [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A first principles investigation of the effect of aluminum, gallium and indium impurities on optical properties of β-Si3N4 structure

Narin

Kutlu

Atmaca

et al. 2017

Optik

View full text Add to dashboard Cite

In this study, effects of some impurity atoms included in IIIA group such as Al, Ga, and In on the optical properties of the ␤-Si 3 N 4 structure have been discussed. The calculations were made using Density Functional Theory (DFT) in 0-15 eV range and local density approximation (LDA) as the exchange-correlation. Using the real and the imaginary parts of the complex dielectric function, the basic optical properties of ␤-Si 3 N 4 such as dielectric coefficient, refractive index, absorption, reflection coefficients have been investigated. As a result of the calculations, it is determined that optical properties of structure have been significantly changed with doping.

show abstract

Microstructure and property enhancement of silicon nitride-barium aluminum silicate composites with β-Si3N4 seed addition

Cited by 21 publications

References 29 publications

Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

A first principles investigation of the effect of aluminum, gallium and indium impurities on optical properties of β-Si3N4 structure

Contact Info

Product

Resources

About