Rapid growth and formation mechanism of ultrafine structural oxide eutectic ceramics by laser direct forming

H. J. Su; J. Zhang; L. Liu; J. Eckert; H. Z. Fu

doi:10.1063/1.3664108

Rapid growth and formation mechanism of ultrafine structural oxide eutectic ceramics by laser direct forming

H. J. Su, J. Zhang, L. Liu, J. Eckert, H. Z. Fu

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

Melt growth of oxide eutectic is an important and fast-growing research topic in the fields of both applied physics and materials science. Rapid one-step fabrication of melt-grown oxide ceramics with large size is developed using laser direct forming. The near 100 density of Al₂O ₃/YAG eutectic ceramic in situ composite free of pore and cracks is rapidly melted/solidified directly from Al₂O₃-Y ₂O₃ powder without any preforming or sintering. Uniform three-dimensional network of ultrafine nanostructured eutectic microstructure is obtained. The direct experimental evidence of faceted-nonfaceted eutectic transition at high growth rate is presented and the physical model of the microstructural formation based on atom cluster elementary process is proposed. This technology provides a rapid freeform fabrication of high-performance complex shaped ceramics for various applications.

Original language	English
Article number	221913
Journal	Applied Physics Letters
Volume	99
Issue number	22
DOIs	https://doi.org/10.1063/1.3664108
State	Published - 28 Nov 2011

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10.1063/1.3664108

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title = "Rapid growth and formation mechanism of ultrafine structural oxide eutectic ceramics by laser direct forming",

abstract = "Melt growth of oxide eutectic is an important and fast-growing research topic in the fields of both applied physics and materials science. Rapid one-step fabrication of melt-grown oxide ceramics with large size is developed using laser direct forming. The near 100 density of Al2O 3/YAG eutectic ceramic in situ composite free of pore and cracks is rapidly melted/solidified directly from Al2O3-Y 2O3 powder without any preforming or sintering. Uniform three-dimensional network of ultrafine nanostructured eutectic microstructure is obtained. The direct experimental evidence of faceted-nonfaceted eutectic transition at high growth rate is presented and the physical model of the microstructural formation based on atom cluster elementary process is proposed. This technology provides a rapid freeform fabrication of high-performance complex shaped ceramics for various applications.",

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T1 - Rapid growth and formation mechanism of ultrafine structural oxide eutectic ceramics by laser direct forming

AU - Su, H. J.

AU - Zhang, J.

AU - Liu, L.

AU - Eckert, J.

AU - Fu, H. Z.

PY - 2011/11/28

Y1 - 2011/11/28

N2 - Melt growth of oxide eutectic is an important and fast-growing research topic in the fields of both applied physics and materials science. Rapid one-step fabrication of melt-grown oxide ceramics with large size is developed using laser direct forming. The near 100 density of Al2O 3/YAG eutectic ceramic in situ composite free of pore and cracks is rapidly melted/solidified directly from Al2O3-Y 2O3 powder without any preforming or sintering. Uniform three-dimensional network of ultrafine nanostructured eutectic microstructure is obtained. The direct experimental evidence of faceted-nonfaceted eutectic transition at high growth rate is presented and the physical model of the microstructural formation based on atom cluster elementary process is proposed. This technology provides a rapid freeform fabrication of high-performance complex shaped ceramics for various applications.

AB - Melt growth of oxide eutectic is an important and fast-growing research topic in the fields of both applied physics and materials science. Rapid one-step fabrication of melt-grown oxide ceramics with large size is developed using laser direct forming. The near 100 density of Al2O 3/YAG eutectic ceramic in situ composite free of pore and cracks is rapidly melted/solidified directly from Al2O3-Y 2O3 powder without any preforming or sintering. Uniform three-dimensional network of ultrafine nanostructured eutectic microstructure is obtained. The direct experimental evidence of faceted-nonfaceted eutectic transition at high growth rate is presented and the physical model of the microstructural formation based on atom cluster elementary process is proposed. This technology provides a rapid freeform fabrication of high-performance complex shaped ceramics for various applications.

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DO - 10.1063/1.3664108

M3 - 文章

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VL - 99

JO - Applied Physics Letters

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Rapid growth and formation mechanism of ultrafine structural oxide eutectic ceramics by laser direct forming

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