Sintering, high temperature strength and oxidation resistance of liquid-phase-pressureless-sintered SiC–AlN ceramics with addition of rare-earth oxides

Magnani, Giuseppe; Antolini, F.; Beaulardi, Leandro; Burresi, Emiliano; Coglitore, Antonino; Mingazzini, Claudio

doi:10.1016/j.jeurceramsoc.2008.12.020

Cited by 40 publications

(12 citation statements)

References 24 publications

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“…SiC, a covalent ceramic, retains its high strength properties even at high temperatures ( Ref 28,29). One anticipates that the high-temperature mechanical properties of ZTA itself might be Figure 10 shows the microstructure of the ZrO 2 -Al 2 O 3 -10 vol.% SiC specimen after heat treatment in air at 1373 K for 5 h. The crack regions on the surface of the specimen observed by SEM are partially filled with a certain new material.…”

Section: High-temperature Mechanical Properties Of Zro 2 -Al 2 O 3 -Smentioning

confidence: 99%

Microstructure and High-Temperature Mechanical Properties of ZrO2-Al2O3-SiC Ceramics

Zhang

Ouyang

Wang

et al. 2015

J. of Materi Eng and Perform

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In the present work, ZrO 2 -Al 2 O 3 ceramics incorporated with and without b-SiC were prepared by hot pressing. ZrO 2 -Al 2 O 3 ceramic powder used in this study is a mixture of 71 vol.% YSZ (3 mol.% Y 2 O 3 partially stabilized zirconia) and 29 vol.% a-Al 2 O 3 . b-SiC powders with different volume fractions are added into the ZrO 2 -Al 2 O 3 powder to form the composite powder. The microstructure and high-temperature mechanical properties of ZrO 2 -Al 2 O 3 -SiC ceramics were investigated by tailoring the compositions and sintering parameters to optimize the strengthening mechanisms. For a comparative study, the TZ3Y20A powder was also hot-pressed under identical sintering condition to form dense bulk ceramic. ZrO 2 -Al 2 O 3 -SiC ceramics consist mainly of t-ZrO 2 , a-Al 2 O 3 , and b-SiC phases. SiC particles in the ZrO 2 -Al 2 O 3 ceramic restrain the grain growth of the oxide matrix. The incorporation of SiC into ZrO 2 -Al 2 O 3 ceramic enhances high-temperature flexural strength at 1273 K. ZrO 2 -Al 2 O 3 ceramic incorporated with 15 vol.% SiC has a flexural strength of 518 MPa at 1273 K, much higher than that (201 MPa) of unmodified ZrO 2 -Al 2 O 3 ceramic.

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Section: High-temperature Mechanical Properties Of Zro 2 -Al 2 O 3 -Smentioning

confidence: 99%

Microstructure and High-Temperature Mechanical Properties of ZrO2-Al2O3-SiC Ceramics

Zhang

Ouyang

Wang

et al. 2015

J. of Materi Eng and Perform

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“…SiC ceramics have many applications because they allow the combination of important properties such as low density, high elastic and rupture modulus, high thermal shock resistance, and high resistance to corrosion and oxidation at high temperatures [1][2][3][4][5][6][7][8][9][10][11][12][13] . One of the properties of SiC ceramics that limits many applications is their low fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

“…Examples of well known additives are mixtures of Al 2 [2][3][4]9,10] . Among the aforementioned rare earth oxides, the one best known for production of the liquid phase during sintering is Y 2 O 3 , which appears in numerous publications [1][2][3][4][5][6][7][8][9][10][11][12][13] . Yttrium is one of the four most abundant rare earths and dysprosium and ytterbium occupy the eighth and ninth place 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Properties of SiC Ceramics Sintered via Liquid Phase Using Al2O3 + Y2O3, Al2O3 + Yb2O3 and Al2O3 + Dy2O3 as Additives: a Comparative Study

Ribeiro

Oliveira

2015

Mat. Res.

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“…of such ceramic 4 . Based on the various investigations presented in the literature, the following systems have been evaluated for this purpose: AlN -Re 2 O 3 (Re = Y, La e Nd) [5] , AlN -Y 2 O 3 [6,7] , AlN -Re 2 O 3 (Re = Y e Yb) [8] , AlN -Re 2 O 3 (Re = Y, Er e Yb) [9] , AlN -Re 2 O 3 (Re = Y, Yb, Er, Lu, Ho, Sm e Ce) [10] , AlN -Re 2 O 3 (Re = Y, Yb, La) [11] .…”

Section: Introductionmentioning

confidence: 99%

Melting Temperature and Wetting Angle of AlN/Dy2O3 and AlN/Yb2O3 Mixtures on SiC Substrates

2015

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This work aims to evaluate the melting temperature and wetting behavior of AlN/Re 2 O 3 (Re = Dy, Yb) mixtures when in contact with SiC substrates at high temperatures, in order to define whether these compounds can be further used to induce a more effective liquid phase sintering of SiC-based products. The prepared samples were placed on SiC plates and thermally treated up to 1900 °C under argon. The melting point and spreading evolution of different compositions of AlN/Re 2 O 3 on SiC were determined by analyzing images captured as a function of the heating temperature. The contact angle and melting point were measured using the ImageJ software and according to DIN 51730, respectively. Based on the obtained wetting curves, all evaluated conditions resulted in the decrease of the contact angle values with temperature. The mixtures presenting improved wetting (θ ~ 1° and 3°) on SiC plates were the ones above the selected eutectic point.

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Sintering, high temperature strength and oxidation resistance of liquid-phase-pressureless-sintered SiC–AlN ceramics with addition of rare-earth oxides

Cited by 40 publications

References 24 publications

Microstructure and High-Temperature Mechanical Properties of ZrO2-Al2O3-SiC Ceramics

Microstructure and High-Temperature Mechanical Properties of ZrO2-Al2O3-SiC Ceramics

Properties of SiC Ceramics Sintered via Liquid Phase Using Al2O3 + Y2O3, Al2O3 + Yb2O3 and Al2O3 + Dy2O3 as Additives: a Comparative Study

Melting Temperature and Wetting Angle of AlN/Dy2O3 and AlN/Yb2O3 Mixtures on SiC Substrates

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