Review and Overview of Silicon Nitride and SiAlON, Including their Applications

Kita, Hideki; Hyuga, Hideki; Hotta, Mikinori; Kondo, Naoki

doi:10.1016/b978-0-12-385469-8.00015-0

Cited by 7 publications

(7 citation statements)

References 49 publications

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“…Therefore, the quantities and species of ILs possessing superlubricity property need to be extended. In the present work, Si 3 N 4 was chosen as the tribopair because it is widely used in many fields, including electronics, automobile industry, metal cutting tools, bearings, orthopedic applications, high-temperature materials, and so on, and macroscale superlubricity was observed at Si 3 N 4 interfaces under the lubrication of a series of in situ-formed ILs, and one of them exhibited the greatest antiwear property. The roles of cations and anions in ILs in realizing superlubricity are studied and analyzed to understand the superlubricity and antiwear mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Superlubricity and Antiwear Properties of In Situ-Formed Ionic Liquids at Ceramic Interfaces Induced by Tribochemical Reactions

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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Several ionic liquids (ILs) are formed in situ with monovalent metal salts and ethylene glycol (EG). The macroscale superlubricity and antiwear properties of the ILs were studied between ceramic materials. Superlow coefficients of friction of less than 0.01 could be obtained for all ILs at silicon nitride (Si3N4) interfaces induced by tribochemical reactions. Notably, the IL ([Li(EG)]PF6) formed with LiPF6 and EG exhibited the greatest superlubricity and antiwear properties. The results of film thickness calculations and surface analysis showed that the lubrication regime during the superlubricity period was the mixed lubrication, and a composite tribochemical layer (composed of phosphates, fluorides, silica (SiO2), and ammonia-containing compounds), hydration layer, and fluid film contributed to superlubricity and wear protection. It was found that the small size of metal cations was beneficial for alleviating wear, and PF6 – anions exhibited the smallest friction and best antiwear performance at Si3N4 interfaces. This work studied the lubricity and antiwear properties of ILs with different cations and anions, enriching the range of alternative ILs for macroscale superlubricity and low wear, and is of importance to engineering applications.

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Section: Introductionmentioning

confidence: 99%

Superlubricity and Antiwear Properties of In Situ-Formed Ionic Liquids at Ceramic Interfaces Induced by Tribochemical Reactions

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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“…Inheriting the excellent mechanical properties of α‐Si 3 N 4 , α‐SiAlON ceramics have attracted abundant research 1,5–10 . However, few studies focus on their thermal properties, 11–13 which are critical for many applications.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of Ca α‐SiAlON ceramics with varying m and n values

Zhang,

et al. 2023

J Am Ceram Soc.

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α-SiAlON is well known for its excellent mechanical properties, but its thermal properties are less investigated. In this work, we investigate the thermal conductivity of Ca α-SiAlON ceramics with varying m and n values and prepared samples by spark plasma sintering (SPS) at 1600 • C or gas pressure sintering (GPS) at 1800 • C and 1900 • C. The prepared Ca α-SiAlON ceramics showed thermal conductivities ranging from 4.6 to 10.7 W/(mK) at 25 • C. It was found that the thermal conductivity of the α-SiAlON samples could be reduced by increasing either m or n or both. Besides, the samples prepared by SPS had lower thermal conductivity compared with those by GPS due to their smaller grain size, and the effect of m and n would be minor after m reached 2. These results provide basic knowledge for tuning α-SiAlON's thermal conductivity for applications concerning thermal management.

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“…SiAlON is a solid solution formed by replacing Si 4+ and N 3− by Al 3+ and O 2− in Si 3 N 4 lattice without changing the structure 1–6 . As an important engineering material, SiAlON ceramics have been widely investigated due to its excellent mechanical properties and high‐temperature durability.…”

Section: Introductionmentioning

confidence: 99%

“…SiAlON is a solid solution formed by replacing Si 4+ and N 3− by Al 3+ and O 2− in Si 3 N 4 lattice without changing the structure. [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.…”

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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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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Review and Overview of Silicon Nitride and SiAlON, Including their Applications

Cited by 7 publications

References 49 publications

Superlubricity and Antiwear Properties of In Situ-Formed Ionic Liquids at Ceramic Interfaces Induced by Tribochemical Reactions

Superlubricity and Antiwear Properties of In Situ-Formed Ionic Liquids at Ceramic Interfaces Induced by Tribochemical Reactions

Thermal conductivity of Ca α‐SiAlON ceramics with varying m and n values

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

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