Solidification microstructure of laser floating zone remelted Al2O3/YAG eutectic in situ composite

被引：31

作者：

Song, K. ^{[1
]}

Zhang, J. ^{[1
]}

Jia, X. J. ^{[1
]}

Su, H. J. ^{[1
]}

Liu, L. ^{[1
]}

Fu, H. Z. ^{[1
]}

机构：

[1] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 2012年 / 345卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Crystal morphology; Directional solidification; Eutectics; Floating zone technique; IRREGULAR EUTECTICS; FE-C; GROWTH; FIBERS; AL2O3/Y3AL5O12; BEHAVIOR; YAG; CERAMICS; CRYSTALS; SYSTEM;

D O I：

10.1016/j.jcrysgro.2012.02.017

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Alumina based eutectic in situ composite is now considered to be a promising candidate for ultrahigh temperature structural materials due to its excellent performance even close to its melting point. In this work, Laser Floating Zone (LFZ) solidification experiments have been performed on Al2O3/Y2O3 containing 18.5 mol% Y2O3 eutectic in situ composite at growth rate between 8 and 800 mu m/s. The solid/liquid (S/L) interface morphology of this system was reported. Based on the interface morphology, the lamellar selection mechanism of irregular eutectic systems was also discussed. The solidification microstructure evolution was studied, and the characteristic scale of irregular eutectic systems was analyzed using a mathematical model considering non-isothermal interface morphology. An important parameter, Phi, which represents relationship between characteristic scales, was also given. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：51 / 55

页数：5

共 32 条

[1] Solidification microstructure of laser remelted Al2O3-ZrO2 eutectic
Bourban, S
Karapatis, N
Hofmann, H
Kurz, W
[J]. ACTA MATERIALIA, 1997, 45 (12) : 5069 - 5075
[2] MELTING BEHAVIOR AND METASTABILITY OF YTTRIUM ALUMINUM GARNET (YAG) AND YAIO3 DETERMINED BY OPTICAL DIFFERENTIAL THERMAL-ANALYSIS
CASLAVSKY, JL
VIECHNICKI, DJ
[J]. JOURNAL OF MATERIALS SCIENCE, 1980, 15 (07) : 1709 - 1718
[3] Microstructure of Al2O3/Y3Al5O12 eutectic fibers grown by μ-PD method
Epelbaum, BM
Yoshikawa, A
Shimamura, K
Fukuda, T
Suzuki, K
Waku, Y
[J]. JOURNAL OF CRYSTAL GROWTH, 1999, 198 : 471 - 475
[4] A THEORY OF BRANCHING LIMITED GROWTH OF IRREGULAR EUTECTICS
FISHER, DJ
KURZ, W
[J]. ACTA METALLURGICA, 1980, 28 (06): : 777 - 794
[5] Crystallographic texture and orientation variants in Al2O3-Y3Al5O12 directionally solidified eutectic crystals
Frazer, CS
Dickey, EC
Sayir, A
[J]. JOURNAL OF CRYSTAL GROWTH, 2001, 233 (1-2) : 187 - 195
[6] The growth of Nd:YAG single crystals
Golubovic, A
Nikolic, S
Gajic, R
Duric, S
Valcic, A
[J]. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 2002, 67 (04) : 291 - 300
[7] GRUZLESK.JE, 1968, T METALL SOC AIME, V242, P1785
[8] HONG CP, 1975, J JPN FOUNDRYMANS SO, V47, P422
[9] JACKSON KA, 1966, T METALL SOC AIME, V236, P1129
[10] Lakiza SM, 1997, J AM CERAM SOC, V80, P893, DOI 10.1111/j.1151-2916.1997.tb02919.x

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