Thermal conductivity of β-SiAlONs prepared by a combination of combustion synthesis and spark plasma sintering

Yi, Xuemei; Zhang, W.; Akiyama, Tomohiro

doi:10.1016/j.tca.2013.12.002

Cited by 16 publications

(12 citation statements)

References 24 publications

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“…As the mean free path λ equals the product of relaxation time τ and sound velocity v s , 𝜆 = 𝑣 𝑠 𝜏 (7) we obtain the expression for intrinsic phonon-phonon scattering…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5][6] As an important engineering material, SiAlON ceramics have been widely investigated due to its excellent mechanical properties and high-temperature durability. However, few studies have been reported on the thermal diffusivity/conductivity of SiAlON ceramics, [7][8][9][10][11][12][13][14] especially α-SiAlON. [11][12][13][14] The general formula of α-SiAlON is M x Si 12−m−n Al m+n O n N 16−n (x = m/v, v is the valence of M), where M is the stabilizing ion (Ca, Y, and most rareearth cations).…”

Section: Introductionmentioning

confidence: 99%

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Influence of stabilizing ions and sintering process on the thermal conductivity of α‐SiAlON ceramics

Zhang

et al. 2022

J Am Ceram Soc.

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α‐SiAlON ceramics with different stabilizing ions of Yb, Dy, Nd, Y, Ca, and binary stabilizing ions of (Yb + Ca) and (Yb + Nd) were prepared by spark plasma sintering at 1600°C and gas pressure sintering at 1800 and 1900°C, and their thermal conductivity was investigated. It was found that α‐SiAlON ceramics with larger and heavier stabilizing ions had lower thermal conductivity and the thermal conductivity could be further reduced by using binary stabilizing ions, which can be explained by phonon scattering from point defects. At the same time, the samples prepared at lower sintering temperatures showed smaller grain sizes and lower thermal conductivity. The relationship between the thermal diffusivity of samples and temperature was studied, where the dependence of inverse thermal diffusivity on temperature was better fitted by a quadratic fitting function than the usual linear one over a wide temperature range from 25 to 800°C.

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“…As the mean free path λ equals the product of relaxation time τ and sound velocity v s , 𝜆 = 𝑣 𝑠 𝜏 (7) we obtain the expression for intrinsic phonon-phonon scattering…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of stabilizing ions and sintering process on the thermal conductivity of α‐SiAlON ceramics

Zhang

et al. 2022

J Am Ceram Soc.

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“…The results show that the density, hardness, modulus of elasticity, flexural strength and thermal expansion coefficient of β-SiAlON decreased with an increase in the Z value [6]. It has been reported that, compared to α-SiAlON, β-SiAlON exhibits enhanced fracture toughness and strength as well as high thermal conductivities and thermal shock resistance due to the rod-shaped grain structure [7,8]. Because of its outstanding mechanical and thermal properties at high temperatures, and its excellent chemical stability and thermal shock resistance, β-SiAlON has been attracting considerable attention as an important high-temperature resistant ceramic [9][10][11][12].…”

Section: Introductionmentioning

confidence: 94%

THE SHRINKAGE, PHASE COMPOSITION AND MECHANICAL PROPERTIES OF CERAMICS WITH DIFFERENT β-SiAlON MAIN CRYSTALLINE PHASES PREPARED BY STEREOLITHOGRAPHY

Tian¹

2020

Ceramics - Silikaty

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In this paper, using Si 3 N 4 , Al 2 O 3 and AlN particles as raw materials, β-SiAlON ceramics with different main crystal phases were designed. The green body of the β-SiAlON-matrix ceramic samples were obtained by using stereolithography (SLA) additive manufacturing. After degreasing, dense β-SiAlON ceramics with different SiAlON phases were fabricated through gas pressure sintering at 1800 °C for 1 hour at GPa. The effects of the different Al 2 O 3 contents on the shrinkage, phase composition, relative density, microstructure, mechanical property and hardness were studied. The results indicate that the main phase of the ceramics was β-SiAlON and the specific chemical compositions of it were Si 5 AlON 7 , Si 3.1 Al 2.9 O 2.9 N 5.1 and Si 2 Al 4 O 4 N 4 . The intergranular phases that exists were mainly Y 3 Al 5 O 12 , YAlO 3 and Al 2 O 3 . With a relative density of 90.03 %, the Vickers hardness (Hv5), bending strength and fracture toughness of the fabricated β-Si 5 AlON 7 ceramics were 16.8 GPa, 465 MPa and 4.84 MPa•m 1/2 , respectively. Meanwhile, the shrinkage of the materials was 28.7 %

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“…Magnesium diboride MgB 2 is an attractive superconductor with the critical transit point of Тc = 39- [112], (f) TaB 2 [115], (g) ZrB 2 [116], (h) TiN-TiB 2 [118], (i) SiC; (j) AlN-TiN [120], (k) β-Si 6-z Al z O z N 8-z [123]; (l) Y-SiAlON [124].…”

Section: Shs-ceramicsmentioning

confidence: 99%

Self-propagating high-temperature synthesis of advanced materials and coatings

Левашов

Mukas'yan

Rogachev

et al. 2016

International Materials Reviews

316

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Self-propagating high-temperature synthesis (SHS) or combustion synthesis (CS) is a rapidly developing research area. SHS materials are being used in various fields, including mechanical and chemical engineering, medical and bioscience, aerospace and nuclear industries. The goal of the present paper is to provide a comprehensive state-of-the-art review and to analyse a critical mass of knowledge in the field of SHS materials and coatings. We also briefly discuss the history and scientific foundations of SHS along with an overview of the technological aspects for synthesis of different materials, including powders, ceramics, metal-ceramics, intermetallides, and composite materials. Application of CS in the field of surface engineering is also discussed focusing on two main routes for applying SHS to coating deposition: (i) single-step formation of the desired coatings and (ii) use of SHSderived powders, targets or electrodes in the coating deposition processes.

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Thermal conductivity of β-SiAlONs prepared by a combination of combustion synthesis and spark plasma sintering

Cited by 16 publications

References 24 publications

Influence of stabilizing ions and sintering process on the thermal conductivity of α‐SiAlON ceramics

Influence of stabilizing ions and sintering process on the thermal conductivity of α‐SiAlON ceramics

THE SHRINKAGE, PHASE COMPOSITION AND MECHANICAL PROPERTIES OF CERAMICS WITH DIFFERENT β-SiAlON MAIN CRYSTALLINE PHASES PREPARED BY STEREOLITHOGRAPHY

Self-propagating high-temperature synthesis of advanced materials and coatings

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