Thermal conductivity of liquid phase sintered silicon carbide

Sigl, Lorenz S.

doi:10.1016/s0955-2219(02)00271-6

Cited by 89 publications

(45 citation statements)

References 25 publications

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“…However, few papers report the systematical sintering study of the SiC with rare-earth oxides. [12][13][14][15][16] The purpose of this study is to investigate the sinterability and mechanical properties of SiC-R 2 O 3 system. surface.…”

Section: Introductionmentioning

confidence: 99%

Liquid Phase Sintering and Mechanical Properties of SiC with Rare-Earth Oxide

Tabata

Hirata

Sameshima

et al. 2006

J. Ceram. Soc. Japan

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A SiC powder of median size 0.8 mm was mixed with polyacrylic acid PAA, dispersant in a 0.3 moll-RNO 3 3 solution RࢼYb, Y, Gd, Sm, Nd and La at pH 5 to adsorb uniformly the sintering additive R 3ࢪ ion on the SiC surface. The aqueous 30 volಚ SiC suspension with 0.52 massಚ PAA and 1.50 massಚ R 2 O 3 as RNO 3 3 , relative to SiC, was consolidated by filtration through a gypsum mold to form green compacts of 50-52ಚ of theoretical density. The consolidated green compacts were densified with grain growth to 76-99ಚ relative density by hot-pressing under a pressure of 39 MPa at 1950c C for 2 h in an Ar flow. The addition of R 2 O 3 of smaller R 3ࢪion was effective to enhance the sinterability of SiC and also to achieve smaller grain size of SiC. This result was discussed based on the additional experiment result on the chemical interaction between SiC compact and the SiO 2 -R 2 O 3 liquid. The average flexural strength and Weibull modulus of dense SiC were 612 MPa and 5.1, 719 MPa and 6.7, and 731 MPa and 9.8 for Gd 2 O 3 , Y 2 O 3 and Yb 2 O 3 addition, respectively.

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Section: Introductionmentioning

confidence: 99%

Liquid Phase Sintering and Mechanical Properties of SiC with Rare-Earth Oxide

Tabata

Hirata

Sameshima

et al. 2006

J. Ceram. Soc. Japan

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“…According to sintering temperature-dependent mass loss and TEM observations of porous SiC specimens, the thickness of amorphous SiO 2 layer is nearly unchanged below 1,200°C ( ∼ 0.66 nm), decreases at 1,500°C ( ∼ 0.24 nm) and completely disappears at 1,800°C. The thermal conductivity κ GB+SiO 2 of this hypothetic composite is calculated by [33]:…”

mentioning

confidence: 99%

Porous Nano-SiC as Thermal Insulator: Wisdom on Balancing Thermal Stability, High Strength and Low Thermal Conductivity

Wan

Zhang

et al. 2016

Materials Research Letters

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“…8) or alumina and yttria. 9 The conduction of heat through ceramic materials occurs by transfer of energy between vibrating atoms. At low temperatures, energy travels in the material predominantly via phonons.…”

Section: Resultsmentioning

confidence: 99%

Densification of silicon carbide using oxy-nitride additives for space-based telescope mirror applications

et al. 2011

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Abstract. Densification behavior of alpha silicon carbide (SiC) during vacuum hot pressing was studied up to 1900 o C with sintering additives based on AlN and Y 2 O 3 in different proportions. Near theoretical density was obtained with a total sintering additive content of < 4 vol.%. The microstructure of SiC sintered with AlN + Y 2 O 3 revealed fine equiaxed grains against the additional elongated grains exhibited by SiC sintered with AlN alone. The SiC having high density exhibited very good strength, elastic modulus, high thermal conductivity, low coefficient of thermal expansion and excellent polishability for telescope mirror applications. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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Thermal conductivity of liquid phase sintered silicon carbide

Cited by 89 publications

References 25 publications

Liquid Phase Sintering and Mechanical Properties of SiC with Rare-Earth Oxide

Liquid Phase Sintering and Mechanical Properties of SiC with Rare-Earth Oxide

Porous Nano-SiC as Thermal Insulator: Wisdom on Balancing Thermal Stability, High Strength and Low Thermal Conductivity

Densification of silicon carbide using oxy-nitride additives for space-based telescope mirror applications

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