The effect of AlN-Y2O3 compound on properties of pressureless sintered SiC ceramics-A review

Dehghani, Hadi; Khodaei, Mahdi; Yaghobizadeh, Omid; Ehsani, N.; Baharvandi, Hamid Reza; Alhosseini, S. Hojat Naghavi; Javi, Hassan

doi:10.1016/j.ijrmhm.2020.105420

Cited by 18 publications

(6 citation statements)

References 103 publications

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“…The oxidation bonding method entails the preparation of an SiC powder‐template body followed by sintering the green body in air to promote bonding of SiC particles by in situ oxidation‐derived SiO 2 34–41 . SiO 2 as bonding phase provides a beneficial effect in reducing the temperature required to make necking between particles and facilitating partial densification of SiC strut 14,15,38,41 . Furthermore, by controlling the sintering temperature and template content, the mechanical and thermal properties of porous silica‐bonded SiC ceramics can be adjusted to some extent 34,37,39,41 …”

Section: Introductionmentioning

confidence: 99%

“…Porous silicon carbide (SiC) ceramics have attracted attention not only in the academic field but also industrially due to their remarkable characteristics such as low bulk density, high melting point, high oxidation resistance, bio-inert characteristic, corrosion resistance, high chemical stability, excellent mechanical strength, high specific strength, high thermal shock resistance, tailored thermal conductivity, and controlled permeability. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] These characteristics have made porous SiC ceramics suitable candidates to perform a wide range of engineering applications including membranes for water purification and gas separation, 1,3,5,11,[16][17][18][19] ceramic carriers, 20 lightweight structural materials, 4,6,7,9 hot gas filters, 10,11,[21][22][23][24][25] catalytic supports, [26][27][28] and thermal insulators. [29][30][31][32][33][34]…”

Section: Introductionmentioning

confidence: 99%

“…[34][35][36][37][38][39][40][41] SiO 2 as bonding phase provides a beneficial effect in reducing the temperature required to make necking between particles and facilitating partial densification of SiC strut. 14,15,38,41 Furthermore, by controlling the sintering temperature and template content, the mechanical and thermal properties of porous silica-bonded SiC ceramics can be adjusted to some extent. 34,37,39,41 Extensive studies on the mechanical, thermal, and permeability properties of porous silica-bonded SiC ceramics have been reported, and the key results are summarized as follows:…”

Section: Introductionmentioning

confidence: 99%

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Effects of SiC whisker addition on mechanical, thermal, and permeability properties of porous silica‐bonded SiC ceramics

Lucio

Kultayeva

Kim

et al. 2021

Int J Applied Ceramic Tech

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The effects of SiC whisker addition into nano‐SiC powder‐carbon black template mixture on flexural strength, thermal conductivity, and specific flow rate of porous silica‐bonded SiC ceramics were investigated. The flexural strength of 1200°C‐sintered porous silica‐bonded SiC ceramics increased from 9.5 MPa to 12.8 MPa with the addition of 33 wt% SiC whisker because the SiC whiskers acted as a reinforcement in porous silica‐bonded SiC ceramics. The thermal conductivity of 1200°C‐sintered porous silica‐bonded SiC ceramics monotonically increased from 0.360 Wm–1K–1 to 1.415 Wm–1K–1 as the SiC whisker content increased from 0 to 100 wt% because of the easy heat conduction path provided by SiC whiskers with a high aspect ratio. The specific flow rate of 1200°C‐sintered porous SiC ceramics increased by two orders of magnitude as the SiC whisker content increased from 0 to 100 wt%. These results were primarily attributed to an increase in pore size from 125 nm to 565 nm and secondarily an increase in porosity from 49.9% to 63.6%. In summary, the addition of 33 wt% SiC whisker increased the flexural strength, thermal conductivity, and specific flow rate of porous silica‐bonded SiC ceramics by 35%, 133%, and 266%, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of SiC whisker addition on mechanical, thermal, and permeability properties of porous silica‐bonded SiC ceramics

Lucio

Kultayeva

Kim

et al. 2021

Int J Applied Ceramic Tech

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“…strength and fracture toughness).Nowadays, silicon carbide (SiC) is a widely used non-oxide ceramic with a global production rate of about 700,000 tons/year. Due to its ultra-high hardness and heat/oxidation resistance, it is employed as an abrasive and raw material for producing parts such as refractory furnaces and heating elements [1][2][3][4][5][6][7][8][9] . SiC has two different crystal structures β-SiC and α-SiC with more than 180 polytypes.…”

mentioning

confidence: 99%

“…Solid-state sintering usually requires a sintering temperature above 2100 °C25-27 . Sintering additives achieve high density by reducing grain boundary energy and reacting with the remained silica in SiC particle surfaces 9,11 . In contrast, the liquid-state sintering process performed at temperatures between 1850 and 2000 °C degrades some properties such as the high-temperature fracture toughness [28][29][30][31][32][33][34][35][36] .…”

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confidence: 99%

αSiC - βSiC - graphene composites

Razmjoo

Baharvandi

Ehsani

2023

Sci Rep

Self Cite

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In this study, the mechanical properties of the pressureless sintered samples of α-SiC based composite containing 0–3 wt.% graphene and 0–15 wt.% nano β-SiC were investigated. Simultaneous usage of nano β-SiC and graphene and transformation of β-SiC (3C) to α-SiC (6H/4H) resulted in elongation of secondary α-SiC grains, which significantly improved the mechanical properties (e.g. fracture toughness) of SiC ceramics. According to the results, the highest Relative density of 99.04%, Young’s modulus of 537.76 GPa and fracture toughness of 5.73 MPa × m1/2 were obtained in the sample containing 5 wt.% nano β-SiC and 1 wt.% graphene (5B1G). In addition, two methods of measuring bending strength including three-point bending tests and biaxial tests (piston-on-three-ball) were compared. Strip-shaped specimens were prepared for three-point bending test and disc-shaped specimens were prepared for biaxial bending test. Each bending test was evaluated using a universal testing machine. The results showed that the biaxial bending strength is less than the three-point bending strength. Also, the maximum three-point bending strength of 582.01 MPa and biaxial bending of 441.56 MPa were obtained in 5 wt.% Nano β-SiC and 1 wt.% Graphene samples (5B1G). Studies have shown that in addition to the many advantages of using the biaxial bending method, the results have a very similar trend to the three-point bending strength. Also, the most-increased hardnesses of 28.03 GPa and 29.97 GPa were seen in the sample containing 5 wt.% nano β-SiC (5B) with forces of 10 N and 1 N, respectively. One of the effective mechanisms in improving the fracture toughness of α-SiC ceramics is crack deflection/bridging. Also, the difference in thermal expansion of the α-SiC matrix and the reinforcements, leading to the creation of residual stresses between the matrix grains and the reinforcement, is effective in improving the mechanical properties (e.g. strength and fracture toughness).

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Structural-Phase State and Properties of SiC Ceramics Obtained by Ultrasound-Assisted Liquid-Phase Sintering with Eutectic Additives

Аbilev

Zhilkаshinova

Pavlov

et al. 2023

Silicon

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The effect of AlN-Y2O3 compound on properties of pressureless sintered SiC ceramics-A review

Cited by 18 publications

References 103 publications

Effects of SiC whisker addition on mechanical, thermal, and permeability properties of porous silica‐bonded SiC ceramics

Effects of SiC whisker addition on mechanical, thermal, and permeability properties of porous silica‐bonded SiC ceramics

αSiC - βSiC - graphene composites

Structural-Phase State and Properties of SiC Ceramics Obtained by Ultrasound-Assisted Liquid-Phase Sintering with Eutectic Additives

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