Effect of the Additive of Y2O3 on the Structure Formation and Properties of Composite Materials Based on AlN–SiC

Serbenyuk, Т. B.; Prikhna, T. A.; Sverdun, Vladimir; Sverdun, N. V.; Moshchil, Victor; Ostash, О. P.; Vasyliv, B. D.; Podhurska, Viktoriya; Kovylyaev, V. V.; Chasnyk, V. I.

doi:10.3103/s1063457618010021

Cited by 28 publications

(6 citation statements)

References 15 publications

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“…Dielectric losses are known to cause dielectrics to heat up, which can lead to accelerated aging or thermal breakdown, especially if the dielectric losses are related to electrical conductivity [38]. Thus, when selecting a material during the design of an FHE, it is necessary to estimate the dielectric losses that may occur under these specific operating conditions.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, at room temperature the specific resistance of all coatings varies within 5⋅10 10 -5⋅10 11 Ω⋅m, whereas at temperatures 150-200°C it is 5⋅10 8 -1⋅10 10 Ω⋅m. Changing the slope angles of linear dependences of the change of the specific resistance at low and high temperatures indicates a change in the nature of the electrical conductivity [38,39].…”

Section: Resultsmentioning

confidence: 99%

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Thermophysical Properties of Glass-Ceramic Coatings of PbO–ZnO–B$_2$O$_3$ System Doped with Al$_2$O$_3$, SiO$_2$, and BaO Oxides

Kovbasiuk¹,

Duriagina²,

Mierzwiński³

et al. 2021

Metallofiz. Noveishie Tekhnol.

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The study of heat and electrophysical properties in the system 'stainless steel-glass-ceramic coating' is carried out. Insulating coatings based on the glass-ceramic material of the PbO-ZnO-B 2 O 3 system are synthesized on stainless steel substrates. The temperature dependences of the dielectric loss tangent and dielectric constant of the obtained functional coatings are investigated. The heat capacity, thermal diffusivity and thermal conductivity of the coatings are investigated using a laser flash analysis. These properties are then compared to ones of the substrates. By the method of differential thermal analysis, the optimal modes of heat treatment of glass-ceramic coatings are established. An optimal material with the best electrophysical properties is revealed. Possibilities of using dielectric coatings as functional layers for film heating elements are analysed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of Glass-Ceramic Coatings of PbO–ZnO–B$_2$O$_3$ System Doped with Al$_2$O$_3$, SiO$_2$, and BaO Oxides

Kovbasiuk¹,

Duriagina²,

Mierzwiński³

et al. 2021

Metallofiz. Noveishie Tekhnol.

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“…Nitride-based ceramics and nitrides in general are one of the most interesting research materials that have been the topic of our many previous experimental and theoretical studies. 4,40,[56][57][58] Moreover, AlN has been investigated in great detail in our previous structure prediction studies and properties investigations. 48,50,51 Aluminum nitride has been found in various forms, including experimentally observed structure types.…”

Section: 11mentioning

confidence: 99%

Novel boron‐rich aluminum nitride advanced ceramic materials

Zagorac

Fonović

et al. 2022

Int J Applied Ceramic Tech

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Aluminum nitride (AlN) and boron nitride (BN) are well‐known ceramic materials with numerous valuable properties, whereas recently there is a growing field of research on the AlN/BN advanced ceramic materials. Here, we present a study on boron‐rich AlN, structural and electronic properties, and structure–property relationship. Several AlxB1−xN solid solutions (x = 1, .875, .75, and .625) have been investigated, and structure optimization has been performed for four different structure types: h‐BN, wurtzite, sphalerite, and rock salt. First‐principles calculations were performed using hybrid B3LYP functional. New modifications and compounds have been predicted as a function of boron concentration in AlN, and especially, interesting phase transitions were found at extreme pressure conditions. Electronic properties and band structures were computed, and the possibility for bandgap tuning has been discovered. The present study, and especially the structure–property relationship, gives new possibilities for bandgap engineering in boron‐rich AlN electroceramic materials.

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“…Therefore, various additives like Y 2 O 3 [10], La 2 O 3 [11], and RE(NO 3 ) 3 [12] (RE = rare earth element), etc., as well as the combination of Al 2 O 3 -RE 2 O 3 [13][14][15], AlN-RE 2 O 3 [16,17], and Er 2 O 3 -Y 2 O 3 [18] have been used in the sintering of SiC ceramics to improve its sinterability by liquid phase generation. Further, the Y 2 O 3 additive has been used in various ceramics, including SiC [19][20][21][22], Si 3 N 4 [23,24], TiC [25], ZrB 2 -SiC [26][27][28][29][30], AlN-SiC [31], WC [32][33][34], and cordierite [35], etc. Some references [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] mentioned that the Y 2 O 3 additive could promote the densification of the materials and influence their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Behaviors of Hot-Pressed SiC/SiCw-Y2O3 Ceramics with Different Y2O3 Contents

et al. 2023

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Sintering additives are commonly used to reduce the conditions required for densification in composite ceramics without compromising their performances simultaneously. Herein, SiC/SiCw-Y2O3 composite ceramics with 10 vol.% SiC whiskers (SiCw) and different Y2O3 contents (0, 2.5, 5, 7.5, and 10 vol.%) were fabricated by hot-pressed sintering at 1800 °C, and the effects of Y2O3 content on the microstructure, mechanical properties, and tribological behaviors were investigated. It was found that the increased Y2O3 content can promote the densification of SiC/SiCw-Y2O3 composite ceramics, as evidenced by compact microstructure and increased relative density. The Vickers hardness, fracture toughness, and flexural strength also increased when Y2O3 content increased from 2.5 vol.% to 7.5 vol.%. However, excessive Y2O3 (10 vol.%) aggregated around SiC and SiCw weakens its positive effect. Furthermore, the Y2O3 additive also reduces the coefficient of friction (COF) of SiC/SiCw-Y2O3 composite ceramics, the higher the Y2O3 content, the lower the COF. The wear resistance of SiC/SiCw-Y2O3 composite ceramics is strongly affected by their microstructure and mechanical properties, and as-sintered SiC ceramic with 7.5 vol.% Y2O3 (Y075) shows the optimal wear resistance. The relative density, Vickers hardness, fracture toughness, and flexural strength of Y075 are 97.0%, 21.6 GPa, 7.7 MPa · m1/2, and 573.2 MPa, respectively, the specific wear rate of Y075 is 11.8% of that for its competitor with 2.5 vol.% Y2O3.

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Effect of the Additive of Y2O3 on the Structure Formation and Properties of Composite Materials Based on AlN–SiC

Cited by 28 publications

References 15 publications

Thermophysical Properties of Glass-Ceramic Coatings of PbO–ZnO–B$_2$O$_3$ System Doped with Al$_2$O$_3$, SiO$_2$, and BaO Oxides

Thermophysical Properties of Glass-Ceramic Coatings of PbO–ZnO–B$_2$O$_3$ System Doped with Al$_2$O$_3$, SiO$_2$, and BaO Oxides

Novel boron‐rich aluminum nitride advanced ceramic materials

Mechanical and Tribological Behaviors of Hot-Pressed SiC/SiCw-Y2O3 Ceramics with Different Y2O3 Contents

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