High Temperature Properties and Thermal Stability of a Unidirectionally Solidified Al&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;/Er&lt;SUB&gt;3&lt;/SUB&gt;Al&lt;SUB&gt;5&lt;/SUB&gt;O&lt;SUB&gt;12&lt;/SUB&gt; Eutectic Composite

Nakagawa, Narihito; Waku, Yoshiharu; Wakamoto, Takumi; Ohtsubo, Hideki; Shimizu, Kazutoshi; Kohtoku, Yasuhiko

doi:10.2320/jinstmet1952.64.2_101

Cited by 18 publications

(9 citation statements)

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“…5,8,9 Eutectic structures are highly textured with two twin-related crystallographic orientations. 10 Since the mechanical properties are closely related to the entangled structure, it is of interest to investigate the eutectic solidification of the Al 2 O 3 -YAG system.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9] For example, Al 2 O 3 -YAG (Y 3 Al 5 O 12 , yttrium-aluminum-garnet) eutectic composites exhibit flexural strengths of 360-500 MPa from room temperature to 2073 K in an air atmosphere. 5 The compression creep strength at 1873 K is about 13 times higher than that of sintered composites with the same chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional observation of the entangled eutectic structure in the Al2O3–YAG system

Yasuda

Ohnaka

Mizutani

et al. 2005

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-dimensional observation of the entangled eutectic structure in the Al2O3–YAG system

Yasuda

Ohnaka

Mizutani

et al. 2005

Journal of the European Ceramic Society

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“…[1][2][3][4][5][6][7][8] The Al 2 O 3 -GAP (GdAlO 3 , gadolinium-aluminum-perovskite) eutectic composites produced by melt growth have a flexural yield stress of about 700 MPa, and display some plastic deformation rather than brittle fracture at 1873 K. 9) In the case of the Al 2 O 3 -EAG (Er 3 Al 5 O 12 , erbium-aluminum-garnet) eutectic composites, a flexural strength of 300-350 MPa and excellent thermal stability at 1973 K in an air atmosphere has been reported. 10) Furthermore, research on eutectic composites has been extended to pseudo-ternary systems. The flexural strength of Al 2 O 3 -EAG-ZrO 2 ternary eutectic composites is about twice as high as that of Al 2 O 3 -EAG binary eutectic composites.…”

Section: Introductionmentioning

confidence: 99%

Undercooled Melt Formation by Melting of Metastable Eutectic Structure in Al2O3-Y2O3-ZrO2 System

et al. 2002

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This paper presents a selection of the eutectic systems in the Al 2 O 3 -Y 2 O 3 -ZrO 2 pseudo-ternary system and the production of the undercooled melt due to melting of the metastable eutectic structure at the metastable eutectic temperature. In the pseudo-ternary system, there are two eutectic systems; one is the Al 2 O 3 -YAG(Y 3 Al 5 O 12 )-ZrO 2 equilibrium system and the other is the Al 2 O 3 -YAP(YAlO 3 )-ZrO 2 metastable system. The eutectic system was selected by maximum melt temperature before solidification. YAG nucleation was inhibited in the melt when heated above 2250 K and consequently the metastable eutectic solidification path was selected. The selection controlled by the melt temperature before solidification was similar to that of the Al 2 O 3 -Y 2 O 3 system. Furthermore, the undercooled melt formation was found when the Al 2 O 3 -YAP-ZrO 2 metastable eutectic structure was heated up to temperatures above the metastable eutectic temperature. The addition of ZrO 2 to the Al 2 O 3 -Y 2 O 3 system inhibited the YAG nucleation remarkably and enhanced the undercooled melt formation in comparison with the Al 2 O 3 -Y 2 O 3 pseudo-binary system. Ease of the undercooled melt formation in the pseudo-ternary system will be beneficial for the melt shaping processes.

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“…Therefore, the eutectic composite has excellent high-temperature strength characteristics, creep resistance, superior oxidation resistance and thermal stability at 1700 • C in an air atmosphere. [9][10][11][12][13][14][15] These materials were called melt growth composite (MGC).…”

Section: Introductionmentioning

confidence: 99%

High temperature strength and thermal stability for melt growth composite

Nakagawa

Ohtsubo

Mitani

et al. 2005

Journal of the European Ceramic Society

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High Temperature Properties and Thermal Stability of a Unidirectionally Solidified Al<SUB>2</SUB>O<SUB>3</SUB>/Er<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12</SUB> Eutectic Composite

Cited by 18 publications

References 0 publications

Three-dimensional observation of the entangled eutectic structure in the Al2O3–YAG system

Three-dimensional observation of the entangled eutectic structure in the Al2O3–YAG system

Undercooled Melt Formation by Melting of Metastable Eutectic Structure in Al<SUB>2</SUB>O<SUB>3</SUB>-Y<SUB>2</SUB>O<SUB>3</SUB>-ZrO<SUB>2</SUB> System

High temperature strength and thermal stability for melt growth composite

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