Growth of Al2O3/Y3Al5O12 eutectic fiber by micro-pulling-down method and its high-temperature strength and thermal stability

被引：42

作者：

Yoshikawa, A ^{[1
]}

Epelbaum, BM

Fukuda, T

Suzuki, K

Waku, Y

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Interdisciplinary Res Ctr, Sendai, Miyagi 9808577, Japan

[3] Japan Ultrahigh Temp Mat Res Ctr, Ube, Yamaguchi 7550001, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1999年 / 38卷 / 1AB期

关键词：

sapphire/YAG eutectic; ceramics matrix composite; reinforced fiber; high-temperature strength materials; fiber crystal growth; micro-pulling-down method;

D O I：

10.1143/JJAP.38.L55

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Fiber growth of Y3Al5O12 (YAG) matrix composite reinforced with the sapphire phase was investigated to manufacture sapphire/YAG eutectic composites using the micro-pulling-down (mu-PD) method. Both the sapphire and YAG phases were crystalline. We have controlled the fiber diameter from 200 mu m to 2 mm. The maximal length was about 500 mm. The eutectic fibers have superior high-temperature strength properties, 580 MPa at 1500 degrees C. Tn the tensile test at this temperature, the fiber showed considerable (about 10%) plastic deformation due to dislocation motion. The microstructure of this eutectic fiber has a very high thermal stability. No grain growth was observed after even 75 h of heat treatment at 1500 degrees C in air atmosphere.

引用

页码：L55 / L58

页数：4

共 10 条

[1] Amorphous CaO center dot Al2O3 fibers by melt extraction [J].