Microstructure of Al2O3/Y3Al5O12 eutectic fibers grown by μ-PD method
Microstructure of Al2O3/Y3Al5O12 eutectic fibers grown by μ-PD method
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DOI：
10.1016/s0022-0248(98)01052-5
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发表时间：
1999-03-01
影响因子：
1.8
通讯作者：
Waku, Y
中科院分区：
文献类型：
--
作者：
Epelbaum, BM;Yoshikawa, A;Waku, Y
将mu-PD法应用于Al2O3/Y3Al5O12共晶的纤维生长，可以生长出完全均匀、高纯度的样品，并研究了在高凝固速率下共晶显微组织的形成。Al2O3/Y3Al5O12共晶纤维的直径为0.25 ~ 1.5 mm，长度为500 mm，在拉伸速率为0.15 ~ 10.00 mm/min的大范围内生长，无晶粒、气孔和裂纹。分析了典型共晶组织的发展与拉拔速率的关系。在生长纤维的整个横截面上完成了良好的“汉字”片层分散，片层间距小于1 μ m，具有良好的再现性。根据λ v(p)(1/2) = constant = 10，层间间距符合对拉力速率的反平方根依赖，其中λ的维数为mu m和v(p) - mu m/s。(C) 1999 Elsevier Science B.V.版权所有
The application of mu-PD method to fiber growth of Al2O3/Y3Al5O12 eutectic made possible to grow completely homogeneous, high-purity samples and to investigate the formation of eutectic microstructures under high solidification rates. Eutectic fibers of Al2O3/Y3Al5O12 0.25-1.5 mm in diameter and 500 mm in length free of grains, pores and cracks have been grown over a wide range of pulling rate 0.15-10.00 mm/min, using 4N purity starting materials. The development of characteristic eutectic microstructures in relation to pulling rate has been analyzed. Fine 'Chinese script' lamellae dispersion having interlamellar spacing less than 1 mu m were completed throughout the entire cross-section of grown fibers with excellent reproducibility. The interlamellar spacing agrees with the inverse-square-root dependence on pulling rate according to lambda v(p)(1/2) = constant = 10, where lambda has the dimension mu m and v(p) - mu m/s. (C) 1999 Elsevier Science B.V. All rights reserved.