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

Northwestern Polytechnical University Xian
Institute for Complex Materials

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

52 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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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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