Preparation of graphene nanoplatelets reinforced SiC composites by oscillatory pressure sintering

Yang, Yifan; Zhu, Tianbin; Liao, Ning; Li, Yawei; Liang, Xiong; Xie, Zhipeng; Sang, Shaobai; Dai, Jinning

doi:10.1016/j.ceramint.2022.04.021

Cited by 16 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High‐purity SiC powder (average particle size of 400 nm, purity of 99.9 wt%, Shanghai Chaowei Nano Technology Co. Ltd.) was used as the raw material. The microstructure analysis and phase compositions of SiC powder were the same as those in our previous studies 28 . Also, the phase composition and microstructure of the reinforced phase SiCw (diameter of ∼.28 µm, length of 20–30 µm, purity of 99.9 wt%, Beijing Ilokai Co. Ltd.) are shown in Figure 1.…”

Section: Methodsmentioning

confidence: 92%

“…The microstructure analysis and phase compositions of SiC powder were the same as those in our previous studies. 28 Also, the phase composition and microstructure of the reinforced phase SiCw (diameter of ∼.28 µm, length of 20-30 µm, purity of 99.9 wt%, Beijing Ilokai Co. Ltd.) are shown in Figure 1. Meanwhile, boron carbide and phenol formaldehyde resin powder (carbon sources) are used here as sintering aids.…”

Section: Materials Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical and tribological properties of SiC whisker‐reinforced SiC composites via oscillatory pressure sintering

Yang

Zhu

Sun

et al. 2023

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

SiC whisker (SiCw)‐reinforced SiC composites were prepared by an oscillatory pressure sintering (OPS) process, and the effects of SiCw content on the microstructure and mechanical and tribological properties of such composites were investigated. The addition of SiCw could promote the formation of long columnar α‐SiC, and the aspect ratio of α‐SiC grains first increased and then decreased with the increase of SiCw content. When the SiCw content was 5.42 wt%, the relative density of the SiC–SiCw composite reached up to 99.45%. The SiC–5.42 wt% SiCw composite possessed the highest Vickers hardness, fracture toughness, and flexural strength of 30.68 GPa, 6.66 MPa·m1/2, and 733 MPa, respectively. In addition, the SiC–5.42 wt% SiCw composite exhibited the excellent wear resistance when rubbed with GCr15 steel balls, with a friction coefficient of .76 and a wear rate of 4.12 × 10−7 mm3·N−1·m−1. This could be ascribed to the improved mechanical properties of SiC–SiCw composites, which enhanced the ability to resist peeling and micro‐cutting, thereby enhancing the tribological properties of the composites.

show abstract

Section: Methodsmentioning

confidence: 92%

Section: Materials Preparationmentioning

confidence: 99%

Mechanical and tribological properties of SiC whisker‐reinforced SiC composites via oscillatory pressure sintering

Yang

Zhu

Sun

et al. 2023

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…7,8 In our previous work, the oscillatory pressure sintering (OPS) technique was used to fabricate the ceramics, which exhibited the effect of rapid densification. [9][10][11][12] This is due to the dynamic energy provided by the oscillatory pressure, which accelerates the sliding of grain boundaries and the rearrangement of grains. Therefore, dynamic pressure has the ability to inhibit grain growth through rapid densification, which might solve the problem of the long sintering time of the TSS technique.…”

Section: Introductionmentioning

confidence: 99%

“…Two‐step sintering (TSS) is commonly used as a method to inhibit grain growth, which takes a long time to complete the densification and obtain fine‐grained materials 7,8 . In our previous work, the oscillatory pressure sintering (OPS) technique was used to fabricate the ceramics, which exhibited the effect of rapid densification 9–12 . This is due to the dynamic energy provided by the oscillatory pressure, which accelerates the sliding of grain boundaries and the rearrangement of grains.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine‐grained WC‐based ceramics prepared via two‐step oscillatory pressure sintering

Sun,

Zhu,

Zhang

et al. 2024

J Am Ceram Soc.

Self Cite

View full text Add to dashboard Cite

Grain growth in ceramic‐based composites during sintering has always been an unavoidable problem. Based on the theory of fine‐grained reinforcement, the concept of rapid densification was coupled with the inhibition of grain growth to fabricate ultrafine‐grained WC‐based ceramics. Herein, by combining two‐step sintering with oscillatory pressure sintering (OPS), a new sintering process—two‐step oscillatory pressure sintering (TSOPS), was used for the preparation of ultrafine‐grained WC‐based ceramics. The comparison of the OPS with the TSOPS validated the feasibility of the strategy in achieving homogeneous and fine‐grained microstructures. The optimum mechanical properties of Vickers hardness, fracture toughness, and flexural strength reached up to 29.56 GPa, 7.97 MPa m1/2 and 1591 MPa, respectively. A developed TSOPS process was proposed and proved to dominate the grain size distribution homogenizing, which contributed to the simultaneous enhancement of mechanical properties of the ceramics.

show abstract

“…Among advanced sintering technologies, hot pressing sintering is a mechanical pressure sintering method, which puts the ceramic powder or green body in the mold cavity with pressure assistance [ 23 , 24 , 25 , 26 ]. Due to the driving force supplied by the external pressure, the compaction can be achieved in a short time, and the microstructure with fine and uniform crystals can be obtained [ 27 , 28 , 29 , 30 ]. This sintering method can obtain better mechanical properties of materials, reduce sintering time and temperature, decrease the amount of sintering additives, and improve the high-temperature mechanical properties of materials [ 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Hot Pressing Sintered SiC/Y3Al5O12 Composite Ceramics for Dry Gas Seals

Zou,

Ou,

Zhou

et al. 2024

Materials

View full text Add to dashboard Cite

Silicon carbide (SiC) ceramics with high bending strength were prepared by hot pressing sintering (HPS) with yttrium aluminum garnet (Y3Al5O12, YAG) as sintering additive, and the effects of YAG content and sintering temperature on the sintering behavior, microstructure and mechanical properties of SiC ceramics were investigated in detail. The uniform distribution of YAG to form a liquid phase and the driving force provided by hot pressing sintering decrease the sintering temperature, improve the densification of SiC ceramics, and refine the crystal size. By means of suitable sintering conditions with the additional amount of YAG of 5 wt%, the sintering temperature of 1950 °C and a pressure of 30 MPa, the resultant SiC/YAG composite ceramics possesses high sintering and mechanical properties with the relative density of 98.53%, the bending strength of 675 MPa, the Vickers hardness of up to 17.92 GPa, and the elastic modulus of 386 GPa. The as-prepared SiC/YAG composite ceramics are promisingly used as the dry gas seal materials in the centrifugal compressors.

show abstract

Preparation of graphene nanoplatelets reinforced SiC composites by oscillatory pressure sintering

Cited by 16 publications

References 43 publications

Mechanical and tribological properties of SiC whisker‐reinforced SiC composites via oscillatory pressure sintering

Mechanical and tribological properties of SiC whisker‐reinforced SiC composites via oscillatory pressure sintering

Ultrafine‐grained WC‐based ceramics prepared via two‐step oscillatory pressure sintering

Microstructure and Properties of Hot Pressing Sintered SiC/Y3Al5O12 Composite Ceramics for Dry Gas Seals

Contact Info

Product

Resources

About