Formation of GdAlO3-Al2O3 composite having fine pseudo-eutectic microstructure

被引：15

作者：

Harada, Yohei ^{[1
]}

Ayabe, Kazuya ^{[1
]}

Uekawa, Naofumi ^{[1
]}

Kojima, Takashi ^{[1
]}

Kakegawa, Kazuyuki ^{[1
]}

Kim, Sung Jin ^{[2
]}

机构：

[1] Chiba Univ, Grad Sch Engn, Inage Ku, Chiba 2638522, Japan

[2] Kumoh Natl Inst Technol, Gumi 730701, Gyeongbuk, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 15期

关键词：

milling; Al2O3; pseudo-eutectic; GdALO(3); composites; microstructure;

D O I：

10.1016/j.jeurceramsoc.2008.04.025

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

GdAlO3 and Al2O3 powders were mixed and pulverized using ball mills. The prepared powder was sintered by SPS at 1450 degrees C without holding time. SEM observation of the sintered specimen showed a eutectic-like microstructure. This is called 'pseudo-eutectic' in this research. The microstructure formed from a powder pulverized by a tumbling ball milt for one week was much finer than that by a planetary ball mill for 5 and 10h. The fine homogeneous eutectic-like (pseudo-eutectic) microstructures could be formed at both eutectic and off-eutectic compositions. In case of crystallization from a melt of eutectic components, homogeneous eutectic microstructures can be formed only at restricted compositions very close to the eutectic one. Coarse primary crystals generally exist in the eutectic microstructure at off-eutectic compositions. The pseudo-eutectic microstructures can be formed at any compositions because a mixing ratio of the starting powders can be varied. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2941 / 2946

页数：6

共 24 条

[1]

BERGERON CG, 1984, INTRO PHASE EQUILIBR, P25

[2] Nanocomposites from melt in the system Al2O3-YAG-ZrO2 [J].

Calderon-Moreno, JM ;

Yoshimura, M .

SCRIPTA MATERIALIA, 2001, 44 (8-9) :2153-2156

[3] Microstructure of Al2O3/Y3Al5O12 eutectic fibers grown by μ-PD method [J].

Epelbaum, BM ;

Yoshikawa, A ;

Shimamura, K ;

Fukuda, T ;

Suzuki, K ;

Waku, Y .

JOURNAL OF CRYSTAL GROWTH, 1999, 198 :471-475

[4] Eutectic Al2O3-GdAlO3 composite consolidated by combined rapid quenching and spark plasma sintering technique [J].

Han, YH ;

Nagata, M ;

Uekawa, N ;

Kakegawa, K .

BRITISH CERAMIC TRANSACTIONS, 2004, 103 (05) :219-222

[5] MECHANICAL-PROPERTIES OF DIRECTIONALLY SOLIDIFIED MGO-MGAL2O4 EUTECTIC [J].

KENNARD, FL ;

BRADT, RC ;

STUBICAN, VS .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1976, 59 (3-4) :160-163

[6] ZrO2-Al2O3 eutectic plates produced by laser zone melting [J].

Larrea, A ;

de la Fuente, GF ;

Merino, RI ;

Orera, VM .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2002, 22 (02) :191-198

[7] Growth of MgAl2O4/MgO eutectic crystals by the micro-pulling-down method and its characterization [J].

Lee, JH ;

Yoshikawa, A ;

Fukuda, T .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (08) :1351-1354

[8] Influence of the Y2O3 content and temperature on the mechanical properties of melt-grown Al2O3-ZrO2 eutectics [J].

LLorca, J ;

Pastor, JY ;

Poza, P ;

Peña, JI ;

de Francisco, I ;

Larrea, A ;

Orera, VM .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2004, 87 (04) :633-639

[9] Directionally solidified eutectic ceramic oxides [J].

Llorca, Javier ;

Orera, Victor M. .

PROGRESS IN MATERIALS SCIENCE, 2006, 51 (06) :711-809

[10] Effects of rotational direction and rotation-to-revolution speed ratio in planetary ball milling [J].

Mio, H ;

Kano, J ;

Saito, F ;

Kaneko, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 332 (1-2) :75-80

← 1 2 3 →