Effect of temperature and pre-sintering on phase transformation, texture and mechanical properties of silicon nitride ceramics

Ye, Chaochao; Jiang, Yan; Yue, Xinyan; Ru, Hongqiang; Jia, Hongsheng; Yuanlong, E.; Ren, Quanxing; Sun, Shuhui; Wang, Wei; Zhang, Cuiping

doi:10.1016/j.msea.2018.05.115

Cited by 12 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As evident from Figure 5D–F, the interlocked structure formed by the rod‐shaped β‐Si 3 N 4 grains effectively enhances the fracture toughness of Si 3 N 4 ceramics 27,35,38,39 . The β‐Si 3 N 4 grains in Si 3 N 4 ceramics are rod‐shaped and unoriented arrangement.…”

Section: Resultsmentioning

confidence: 88%

“…Moreover, this experiment aims at rapidly preparing Si 3 N 4 ceramics at low temperature. Low sintering temperature and short sintering time delay particle rearrangement and decrease the solute atomic diffusion rate 16,26,27 …”

Section: Resultsmentioning

confidence: 99%

“…Low sintering temperature and short sintering time delay particle rearrangement and decrease the solute atomic diffusion rate. 16,26,27 The densification mechanism of β-Si 3 N 4 seeds in the sintering of Si 3 N 4 ceramics is a complex process. On the one hand, the introduction of the β-Si 3 N 4 seeds promoted the growth of β-Si 3 N 4 grains, but the seeds were an obstacle to particles rearrangement due to their size.…”

Section: Densificationmentioning

confidence: 99%

“…As evident from Figure 5D-F, the interlocked structure formed by the rod-shaped β-Si 3 N 4 grains effectively enhances the fracture toughness of Si 3 N 4 ceramics. 27,35,38,39 The β-Si 3 N 4 grains in Si 3 N 4 ceramics are rod-shaped and unoriented arrangement. Therefore, when the orientation difference between adjacent grains is large, the crack is deflected in the process of propagation.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

See 3 more Smart Citations

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Jiang

Zhuang

Wang

et al. 2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Si 3 N 4 ceramics with high thermal conductivity and outstanding mechanical properties were prepared by adding β-Si 3 N 4 seeds and nanophase α-Si 3 N 4 powders as modifiers. The introduction of β-Si 3 N 4 seeds enhanced the growth of β-Si 3 N 4 grains. Owing to the interlocked structure induced by the β-Si 3 N 4 grains, the fracture toughness of Si 3 N 4 ceramics reached a high value of 7.6 MPa⋅m 1/2 ; also, the large-sized grains increased the contact possibility of Si 3 N 4 grains, improving the thermal conductivity of Si 3 N 4 ceramics (64 W/(m⋅K)). Because of the introduction of nanophase α-Si 3 N 4 , the flexural strength, fracture toughness, and thermal conductivity of the Si 3 N 4 ceramics increased to 754 MPa, 7.2 MPa⋅m 1/2 , and 54 W/(m⋅K), respectively. According to the analysis of the growth kinetics of Si 3 N 4 grains, the rapid growth of Si 3 N 4 grains was ascribed to the reduction in the activation energy resulting from the introduction of β-Si 3 N 4 seeds and nanophase α-Si 3 N 4 .

show abstract

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Densificationmentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Jiang

Zhuang

Wang

et al. 2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…The pretreatment of annealing and pre‐sintering on the green ceramics has significant influence on the following laser sintering 14 . Furthermore, it will affect the processing quality like laser micro‐machining, due to the phase transformation and texture changes of green ceramics by per‐sintering 15 . Hence, the pre‐sintering or annealing pretreatment of green ceramic body or ceramic powder is important for the microstructure, distribution of grain size, and even densification process.…”

Section: Introductionmentioning

confidence: 99%

Laser sintering of Al₂O₃‐based green ceramics prepared by different pre‐sintering temperatures

Liu

Wang

Zhang

2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Al2O3‐based green ceramics are prepared by isostatic cold pressing technology. The prepared green ceramics are pre‐sintered at the temperature from room temperature to 1100°C, and then Al2O3 ceramics are prepared by laser sintering. The effects of pre‐sintering temperatures and laser parameters on mechanical properties and the sintering quality are analyzed. The results show that good crystallinity of Al2O3 particles is obtained at a higher pre‐sintering temperature. The flexural strength and density of green ceramics increase with the temperature of heat treatment. The flexural strength decreases slightly at ∼200°C due to the paraffin binder disintegration. The pre‐sintering temperature and laser processing parameters have a significant influence on the sintering quality. With the increase of laser power and laser frequency, dynamic grain growth occurs, and then grains are refined. The majority of plate‐like grains are transformed into long cylindrical‐like grains in the severe densification process. However, porous flocculation microstructures are generated on the samples pre‐sintered at 1100°C after laser sintering, which is due to the material gasification in atmospheric environment during sintering by infrared laser. More uniform microstructure and better sintering quality of samples pre‐sintered at 500°C can be achieved after laser sintering with a relatively narrower grain size distribution.

show abstract

Influence of Yag Concentration and Pressing Time on Wear of Si3N4 Based Ceramics

et al. 2021

View full text Add to dashboard Cite

Effect of temperature and pre-sintering on phase transformation, texture and mechanical properties of silicon nitride ceramics

Cited by 12 publications

References 37 publications

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Laser sintering of Al₂O₃‐based green ceramics prepared by different pre‐sintering temperatures

Influence of Yag Concentration and Pressing Time on Wear of Si3N4 Based Ceramics

Contact Info

Product

Resources

About

Effect of temperature and pre-sintering on phase transformation, texture and mechanical properties of silicon nitride ceramics

Cited by 12 publications

References 37 publications

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si 3 N 4 seeds and nanophase additives

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si 3 N 4 seeds and nanophase additives

Laser sintering of Al2O3‐based green ceramics prepared by different pre‐sintering temperatures

Influence of Yag Concentration and Pressing Time on Wear of Si3N4 Based Ceramics

Contact Info

Product

Resources

About

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Laser sintering of Al₂O₃‐based green ceramics prepared by different pre‐sintering temperatures