Processing, Microstructure, and Properties of Al2O3 ‐Y3Al5O12 (YAG) Eutectic Fibers
Processing, Microstructure, and Properties of Al2O3 ‐Y3Al5O12 (YAG) Eutectic Fibers
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DOI：
10.1002/9780470314180.ch88
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
T. Mah;T. Parthasarathy;M. D. Petry;L. Matson
中科院分区：
文献类型：
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作者：
T. Mah;T. Parthasarathy;M. D. Petry;L. Matson
氧化铝YAG共晶纤维使用边缘限定薄膜馈送生长（EFG）技术连续生长。定制了最先进的EFG纤维生长装置，以密切监测和控制加工参数。小直径（< 75 μ m）和高强度（< 2 GPa）的连续Al 2 O3-YAG共晶纤维可以使用EFG技术生长。取决于处理变量，例如，模头尖端的尺寸、纤维拉伸速率、模头尖端温度等，得到各种微结构、纤维直径和强度。纤维强度与纤维公称直径之间没有明显的关系，即使有函数关系，其影响也是次要的。控制纤维强度的主要特征似乎是共晶相的尺度。强度似乎与共晶尺寸-1/2成正比。
Alumina‐YAG eutectic fibers were grown continuously using Edge‐defined Film‐fed Growth (EFG) technique. A state‐of‐the‐art EFG fiber growth apparatus was custom built to monitor and control processing parameters closely. Small diameter (< 75 m̈m) and high strength (< 2 GPa) continuous alumina‐YAG eutectic fibers can be grown using EFG technique. Depending upon the processing variables, e.g., size of die tip, fiber pulling rate, die tip temperature, etc., various microstructures, fiber diameters, and strengths resulted. No apparent relationship between fiber strength and nominal fiber diameter was found. If there was any functional relationship, the effect seems to be secondary. The dominant feature which controls the fiber strength appears to be the scale of the eutectic phases. The strength appears to be propotional to eutectic size−1/2.