Preparation of Directionally Solidified B<SUB>4</SUB>C&ndash;TiB<SUB>2</SUB>&ndash;SiC Ternary Eutectic Composites by a Floating Zone Method and Their Properties

The TiC-TiB2-SiC system was a ternary eutectic, whose eutectic composition was 34TiC-22TiB2-44SiC (mol%). A TiC-TiB2-SiC ternary eutectic composite were synthesized via the floating zone method using TiC, TiB2 and SiC powders as starting materials. The TiC-TiB2-SiC eutectic composite showed a lamellar texture. TiC(022), TiB2(010) and SiC(111) of the eutectic composite were perpendicular to the growth direction. The TiC-TiB2-SiC ternary eutectic composite had a specific relationship among the crystal planes: TiC[011]//TiB2[010]//SiC[112], TiC(200)// TiB2(001)//SiC( 402 ) and TiC(111)//TiB2(101)//SiC( 220 ).

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Mechanical and Microstructural Behaviors of Directionally Solidified Al2O3/Al16Ti5O34 Eutectics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.446-447.224 ◽

2013 ◽

Vol 446-447 ◽

pp. 224-229

Author(s):

Serkan Abali

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Raman Spectroscopy ◽

Crystal Temperature ◽

Floating Zone ◽

Directionally Solidified ◽

Zone Method ◽

Flexure Strength ◽

Floating Zone Method ◽

The Relationship

In this work, rods of Al2O3–TiO2eutectics containing 65 and 60 wt% Al2O3were grown using the laser floating zone method. Raman spectroscopy was used to determine the phase composition. Creep strength of Al2O3–Al16Ti5O34(65AT) eutectic at 1500°C has 320 MPa, which is about higher thanβ–Al2TiO5/Al2O3(60AT) crystal. Temperature dependence flexure strength, hardness, elasticity and fracture toughness of the Al2O3–Al16Ti5O34andβ–Al2TiO5/Al2O3crystals were analyzed. The relationship between the microstructure and the mechanical properties were analyzed the 60 and 65AT eutectic crystals.

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Characterization of Directionally Solidified B4C-TiB2 Composites Prepared by a Floating Zone Method

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.43.712 ◽

2002 ◽

Vol 43 (4) ◽

pp. 712-720 ◽

Cited By ~ 36

Author(s):

Itaru Gunjishima ◽

Takaya Akashi ◽

Takashi Goto

Keyword(s):

Floating Zone ◽

Directionally Solidified ◽

Zone Method ◽

Floating Zone Method

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Preparation of directionally solidified BaTi2O5–Ba6Ti17O40 eutectic by the floating zone method

Journal of Crystal Growth ◽

10.1016/j.jcrysgro.2016.11.038 ◽

2017 ◽

Vol 459 ◽

pp. 23-30 ◽

Cited By ~ 3

Author(s):

K. Shiga ◽

H. Katsui ◽

T. Goto

Keyword(s):

Floating Zone ◽

Directionally Solidified ◽

Zone Method ◽

Floating Zone Method

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Mechanical Properties of the Directionally Solidified Ceramic Eutectic of Al2O3/Al16Ti5O34 Phase Structure

High Temperature Materials and Processes ◽

10.1515/htmp-2012-0124 ◽

2013 ◽

Vol 32 (3) ◽

pp. 309-315

Author(s):

Serkan Abali ◽

Ahmet Ekerim

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Phase Composition ◽

Elastic Modulus ◽

Floating Zone ◽

Directionally Solidified ◽

Raman Spectrometry ◽

Zone Method ◽

Flexure Strength ◽

Floating Zone Method

AbstractAl2O3/TiO2 eutectics containing 62–64 wt% Al2O3 were fabricated by a laser floating zone method. Raman spectrometry was used to determine the phase composition. The compressive creep strength of AT36 (Al16Ti5O34/Al2O3) crystal at 1500°C under the strain rate of 1.0 × 10−4 s−1 has 372 MPa, which is about higher than β-Al2TiO5 and β-Al2TiO5/Al2O3 crystals. High-temperature flexural strength, elastic modulus, hardness and fracture toughness of the AT36 crystals were analyzed. The highest flexure strength at ambient temperature was found in the material with 36 wt% TiO2. In addition, we briefly discussed the relationships between microstructure and mechanical properties in AT36 crystal.

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