Growth and characterization of Al2O3/Y3Al5O12/ZrO2 ternary eutectic fibers
Growth and characterization of Al2O3/Y3Al5O12/ZrO2 ternary eutectic fibers
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DOI：
10.1016/s0022-0248(01)01375-6
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发表时间：
2001-09-01
影响因子：
1.8
通讯作者：
Waku, Y
中科院分区：
文献类型：
--
作者：
Lee, JH;Yoshikawa, A;Waku, Y
采用微下拉法首次生长了Al_2O_3/Y_3Al_5O_（12）/ZrO_2三元共晶纤维，并研究了其组织和力学性能随凝固速率的变化。在0.1- 15 mm/min的提拉速率下生长出直径为0.3-2 mm、长度为500 mm的Al_2 O_3/Y_3Al_5 O_（12）/ZrO_2三元共晶纤维，其显微组织均匀、规则，具有“汉字状”结构。层间距;根据λ = 8 × nu（-12），显示出对提拉速率nu的平方根反比依赖性，其中A的维数为m，nu的单位为μ m/s。以15 mm/min的拉伸速率生长的纤维的硬度达到17.4 GPa，并且对于以15 mm/min的拉伸速率生长的纤维，在25 ℃下测量的拉伸强度为1100 MPa，在1200 ℃下测量的拉伸强度为970 MPa。(C)2001 Elsevier Science B. V.保留所有权利。
Al2O3/Y3Al5O12/ZrO2 ternary eutectic fibers have been grown for the first time by the micro-pulling-down method and their microstructural and mechanical properties investigated as a function of solidification rate. Al2O3/Y3Al5O12/ ZrO2 ternary eutectic fibers 0.3-2 mm in diameter and 500mm in length have been grown with a putting rate of 0.1-15mm/min. The ternary eutectic fibers had homogeneous and regular 'chinese script-like' microstructures. The interlamellar spacing;. exhibited an inverse-square-root dependence on the pulling rate nu according to lambda = 8 x nu (- 1 2), where A has the dimension of m and nu is in mum/s. The hardness reached 17.4 GPa for fibers grown at a pulling rate of 15 mm/min, and the tensile strength was measured to be 1100 MPa at 25 degreesC and 970 MPa at 1200 degreesC for a fiber grown at a pulling rate of 15 mm/min. The hardness increased as the interlamellar spacing decreased. (C) 2001 Elsevier Science B.V. All rights reserved.