Liquid phase sintering and characterization of SiC ceramics

Santos, Aline Corecha; Ribeiro, Sebastião

doi:10.1016/j.ceramint.2018.03.083

Cited by 34 publications

(12 citation statements)

References 35 publications

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“…Silicon carbide (SiC) is a typical covalent bonding material, which has been widely used in aerospace, aeronautics, biomedical, automotive, and electric devices functioning at high temperatures, thanks to its good thermal stability, high thermal conductivity, excellent mechanical strength, and high melting point . However, due to its high brittleness and poor processing performance, it is of great importance to realize effective joining of SiC ceramics to broaden their applications.…”

Section: Introductionmentioning

confidence: 99%

Wetting behavior and brazing of titanium‐coated SiC ceramics using Sn0.3Ag0.7Cu filler

Song

Chen

et al. 2019

J Am Ceram Soc

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By coating active titanium, Sn0.3Ag0.7Cu (SAC) filler wetted SiC effectively, as the contact angle decreased significantly from ~145° to ~10°. Ti3SiC2 and TiOx (x ≤ 1) reaction layers were formed at the droplet/SiC interface, leading to the reduction of contact angle. Reliable brazing of SiC was achieved using titanium deposition at 900°C for 10 minutes, and the typical interfacial microstructure of Ti‐coated SiC/SAC was SiC/TiOx + Ti3SiC2/Sn(s,s). Comparing to direct brazing, Ti–Sn compounds in the brazing seam were effectively reduced and the mechanical property of joints was dramatically improved by titanium coating. The optimal average shear strength of SiC joints reached 25.3 MPa using titanium coating‐ assisted brazing, which was ∼62% higher than that of SiC brazed joints using SAC‐Ti filler directly.

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Section: Introductionmentioning

confidence: 99%

Wetting behavior and brazing of titanium‐coated SiC ceramics using Sn0.3Ag0.7Cu filler

Song

Chen

et al. 2019

J Am Ceram Soc

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“…Silicon carbide (SiC) has emerged as the most attractive material for thermo‐structural and functional applications in the fields of aerospace, aeronautics, biomedical, automotive, nuclear‐reactors, and mechanical industries due to its excellent strength, oxidation resistance, and chemical stability. To consolidate the SiC for these applications, a simple process for obtaining sintered bodies with higher strength and toughness are eagerly required . To develop outstanding SiC sintered bodies with better mechanical properties, several new processes such as reaction sintering (RS) and spark plasma sintering (SPS) have been developed .…”

Section: Introductionmentioning

confidence: 99%

Novel SiC synthesis method applicable to SiC solid phase sintering

Usukawa

Ishikawa

2019

Int J Applied Ceramic Tech

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Most of the present production processes of SiC sintered bodies require some powder mixing using a mechanical milling process (ball milling, and so on). In this case, relatively long hours are required, and there is the problem of contamination during the preparation process. To avoid these problems, we developed a new process for obtaining a self-sinterable, stoichiometric SiC powder, whose precursor material is water-soluble; the precursor material was synthesized from aqueous silica and citric acid containing a small amount of aluminum compound. In order to obtain the stoichiometric SiC composition, the above aqueous precursor material was adequately cured in air (200°C-400°C); subsequently carbonization reaction (~800°C) in nitrogen atmosphere, carbothermal reduction (~1600°C) in argon atmosphere, and pressureless sintering (~1900°C) were performed. Among these processes, the curing process (cross-linking process) is very important for obtaining the equivalent composition (silica and carbon) for the subsequent carbothermal reduction. In this study, the adequate curing temperature and suitable preparation condition for the carbothermal reduction were investigated for the production of stoichiometric self-sinterable SiC powder. The pressureless sintered body achieved using the obtained SiC powder demonstrated a desirable trans-crystalline fracture behavior. K E Y W O R D Sprecursors, silicon carbide, sinter/sintering

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“…The SPS processing of SiC is a specific type of liquid phase sintering (LPS), where small amounts of oxide additives are added to SiC nanopowder as sintering additives . According to the previous reports on the preparation of LPS‐SiC ceramic, it can be concluded that LPS‐SiC is a complex material whose properties vary greatly depending on the sintering additives . Among various sintering additives, the Al 2 O 3 − Y 2 O 3 system is the most common sintering additive for the LPS of SiC ceramics .…”

Section: Introductionmentioning

confidence: 99%

“…9,10 According to the previous reports on the preparation of LPS-SiC ceramic, it can be concluded that LPS-SiC is a complex material whose properties vary greatly depending on the sintering additives. [11][12][13][14][15] Among various sintering additives, the Al 2 O 3 − Y 2 O 3 system is the most common sintering additive for the LPS of SiC ceramics. 16,17 Therefore, in this study, Al 2 For ultimate deployment of SiC-based materials as nuclear fuel or cladding, a number of engineering issues must be explored and quantified, including the corrosion behavior of SiC in hydrothermal environment (350°C/15 MPa).…”

Section: Introductionmentioning

confidence: 99%

Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives

Xie

Liu

et al. 2019

J Am Ceram Soc

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Fully dense SiC bulks with Al2O3 and Al2O3 + Y2O3 sintering additives were prepared by spark plasma sintering and the effect of sintering additives on the hydrothermal corrosion behavior of SiC bulks was investigated in the static autoclave at 400°C/10.3 MPa. The SiC specimen with Al2O3 sintering additive exhibited a higher weight loss and followed a linear law. However, the SiC specimen with Al2O3 + Y2O3 additive exhibited a lower weight loss and followed a parabolic law, indicating that the corrosion kinetic and mechanism were different for these two SiC bulks. Further examination revealed that, a deposited layer was formed on the surface of SiC specimen with Al2O3 + Y2O3 sintering additive after corrosion, which can effectively protect the SiC specimen from further corrosion, and thereby improved the corrosion resistance of the SiC specimen with Al2O3 + Y2O3 sintering additive.

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Liquid phase sintering and characterization of SiC ceramics

Cited by 34 publications

References 35 publications

Wetting behavior and brazing of titanium‐coated SiC ceramics using Sn0.3Ag0.7Cu filler

Wetting behavior and brazing of titanium‐coated SiC ceramics using Sn0.3Ag0.7Cu filler

Novel SiC synthesis method applicable to SiC solid phase sintering

Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives

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Liquid phase sintering and characterization of SiC ceramics

Cited by 34 publications

References 35 publications

Wetting behavior and brazing of titanium‐coated SiC ceramics using Sn0.3Ag0.7Cu filler

Wetting behavior and brazing of titanium‐coated SiC ceramics using Sn0.3Ag0.7Cu filler

Novel SiC synthesis method applicable to SiC solid phase sintering

Comparison of hydrothermal corrosion behavior of SiC with Al2O3 and Al2O3 + Y2O3 sintering additives

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Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives