Halo formation in directionally solidified Al                         2                         O                         3                         -Er                         3                         Al                         5                         O                         12                          off-eutectic in situ composite ceramics

Qun Ren; Haijun Su; Jun Zhang; Guangrao Fan; Haifang Liu; Di Zhao; Yuan Liu; Min Guo; Lin Liu; Hengzhi Fu

doi:10.1016/j.matchar.2019.02.005

Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics

Qun Ren, Haijun Su, Jun Zhang, Guangrao Fan, Haifang Liu, Di Zhao, Yuan Liu, Min Guo, Lin Liu, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

7 Scopus citations

Abstract

Directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ binary off-eutectic composite ceramics have been fabricated by laser floating zone melting. Microstructure morphologies and halo formation behaviors were explored. At hypereutectic composition (Al ₂ O ₃ –22.5 mol% Er ₂ O ₃ ), Er ₃ Al ₅ O ₁₂ primary phase formed but no Al ₂ O ₃ halo structure has been detected at normal solidification rate (~200 μm/s). When the eutectic spacings have refined down to 100–150 nm, only thin layer of Al ₂ O ₃ halo structure could form around the Er ₃ Al ₅ O ₁₂ primary phase. At hypoeutectic composition (Al ₂ O ₃ –13.5 mol% Er ₂ O ₃ ), coarse Er ₃ Al ₅ O ₁₂ halo phase can form around the Al ₂ O ₃ primary dendrite even at low solidification rate (50 μm/s). The formation behavior of halo structures has been analyzed on the basis of competitive growth between primary dendrite phase, halo phase and eutectic.

Original language	English
Pages (from-to)	31-37
Number of pages	7
Journal	Materials Characterization
Volume	150
DOIs	https://doi.org/10.1016/j.matchar.2019.02.005
State	Published - Apr 2019

Keywords

Competitive growth
Directional solidification
Eutectic
Halo formation
Oxide ceramic

Access to Document

10.1016/j.matchar.2019.02.005

Cite this

Ren, Q., Su, H., Zhang, J., Fan, G., Liu, H., Zhao, D., Liu, Y., Guo, M., Liu, L., & Fu, H. (2019). Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics Materials Characterization, 150, 31-37. https://doi.org/10.1016/j.matchar.2019.02.005

Ren, Qun ; Su, Haijun ; Zhang, Jun et al. / Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics In: Materials Characterization. 2019 ; Vol. 150. pp. 31-37.

@article{ae032ade6e5d4d45b336d4128fb08721,

title = " Halo formation in directionally solidified Al 2 O 3 -Er 3 Al 5 O 12 off-eutectic in situ composite ceramics ",

abstract = " Directionally solidified Al 2 O 3 -Er 3 Al 5 O 12 binary off-eutectic composite ceramics have been fabricated by laser floating zone melting. Microstructure morphologies and halo formation behaviors were explored. At hypereutectic composition (Al 2 O 3 –22.5 mol% Er 2 O 3 ), Er 3 Al 5 O 12 primary phase formed but no Al 2 O 3 halo structure has been detected at normal solidification rate (~200 μm/s). When the eutectic spacings have refined down to 100–150 nm, only thin layer of Al 2 O 3 halo structure could form around the Er 3 Al 5 O 12 primary phase. At hypoeutectic composition (Al 2 O 3 –13.5 mol% Er 2 O 3 ), coarse Er 3 Al 5 O 12 halo phase can form around the Al 2 O 3 primary dendrite even at low solidification rate (50 μm/s). The formation behavior of halo structures has been analyzed on the basis of competitive growth between primary dendrite phase, halo phase and eutectic.",

keywords = "Competitive growth, Directional solidification, Eutectic, Halo formation, Oxide ceramic",

author = "Qun Ren and Haijun Su and Jun Zhang and Guangrao Fan and Haifang Liu and Di Zhao and Yuan Liu and Min Guo and Lin Liu and Hengzhi Fu",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Inc.",

year = "2019",

month = apr,

doi = "10.1016/j.matchar.2019.02.005",

language = "英语",

volume = "150",

pages = "31--37",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

Ren, Q, Su, H , Zhang, J, Fan, G, Liu, H, Zhao, D, Liu, Y, Guo, M, Liu, L & Fu, H 2019, ' Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics ', Materials Characterization, vol. 150, pp. 31-37. https://doi.org/10.1016/j.matchar.2019.02.005

Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics . / Ren, Qun; Su, Haijun ; Zhang, Jun et al.
In: Materials Characterization, Vol. 150, 04.2019, p. 31-37.

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

TY - JOUR

T1 - Halo formation in directionally solidified Al 2 O 3 -Er 3 Al 5 O 12 off-eutectic in situ composite ceramics

AU - Ren, Qun

AU - Su, Haijun

AU - Zhang, Jun

AU - Fan, Guangrao

AU - Liu, Haifang

AU - Zhao, Di

AU - Liu, Yuan

AU - Guo, Min

AU - Liu, Lin

AU - Fu, Hengzhi

PY - 2019/4

Y1 - 2019/4

N2 - Directionally solidified Al 2 O 3 -Er 3 Al 5 O 12 binary off-eutectic composite ceramics have been fabricated by laser floating zone melting. Microstructure morphologies and halo formation behaviors were explored. At hypereutectic composition (Al 2 O 3 –22.5 mol% Er 2 O 3 ), Er 3 Al 5 O 12 primary phase formed but no Al 2 O 3 halo structure has been detected at normal solidification rate (~200 μm/s). When the eutectic spacings have refined down to 100–150 nm, only thin layer of Al 2 O 3 halo structure could form around the Er 3 Al 5 O 12 primary phase. At hypoeutectic composition (Al 2 O 3 –13.5 mol% Er 2 O 3 ), coarse Er 3 Al 5 O 12 halo phase can form around the Al 2 O 3 primary dendrite even at low solidification rate (50 μm/s). The formation behavior of halo structures has been analyzed on the basis of competitive growth between primary dendrite phase, halo phase and eutectic.

AB - Directionally solidified Al 2 O 3 -Er 3 Al 5 O 12 binary off-eutectic composite ceramics have been fabricated by laser floating zone melting. Microstructure morphologies and halo formation behaviors were explored. At hypereutectic composition (Al 2 O 3 –22.5 mol% Er 2 O 3 ), Er 3 Al 5 O 12 primary phase formed but no Al 2 O 3 halo structure has been detected at normal solidification rate (~200 μm/s). When the eutectic spacings have refined down to 100–150 nm, only thin layer of Al 2 O 3 halo structure could form around the Er 3 Al 5 O 12 primary phase. At hypoeutectic composition (Al 2 O 3 –13.5 mol% Er 2 O 3 ), coarse Er 3 Al 5 O 12 halo phase can form around the Al 2 O 3 primary dendrite even at low solidification rate (50 μm/s). The formation behavior of halo structures has been analyzed on the basis of competitive growth between primary dendrite phase, halo phase and eutectic.

KW - Competitive growth

KW - Directional solidification

KW - Eutectic

KW - Halo formation

KW - Oxide ceramic

UR - http://www.scopus.com/inward/record.url?scp=85061346309&partnerID=8YFLogxK

U2 - 10.1016/j.matchar.2019.02.005

DO - 10.1016/j.matchar.2019.02.005

M3 - 文章

AN - SCOPUS:85061346309

SN - 1044-5803

VL - 150

SP - 31

EP - 37

JO - Materials Characterization

JF - Materials Characterization

ER -

Ren Q, Su H , Zhang J, Fan G, Liu H, Zhao D et al. Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics Materials Characterization. 2019 Apr;150:31-37. doi: 10.1016/j.matchar.2019.02.005

Halo formation in directionally solidified Al ₂ O ₃ -Er ₃ Al ₅ O ₁₂ off-eutectic in situ composite ceramics

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this