Microstructures and mechanical properties of a directionally solidified NiAl-Mo eutectic alloy
Microstructures and mechanical properties of a directionally solidified NiAl-Mo eutectic alloy
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DOI：
10.1016/j.actamat.2004.09.003
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发表时间：
2005-01-03
期刊：
影响因子：
9.4
通讯作者：
George, EP
中科院分区：
文献类型：
--
作者：
Bei, H;George, EP
一种NiAl-Mo三元共晶合金，名义成分为Ni-45.5Al-9 Mo（at.%）。在高温光学浮区炉中定向凝固。获得了由NiAl基体和14%（体积）具有正方形横截面的连续Mo纤维组成的对齐的棒状显微组织。随着生长速率的增加（从20到80 mm/h）。Mo纤维的间距和尺寸减小。从大约2到1 μ m（纤维间距）和800到400 nm（纤维尺寸）。X射线微探针分析表明NiAl基体基本上不含Mo，
A NiAl-Mo ternary eutectic alloy, having the nominal composition Ni-45.5Al-9Mo (at.%). was directionally solidified in a high-temperature optical floating zone furnace. Well-aligned rod-like microstructures were obtained, consisting of NiAl matrix and 14% (by volume) continuous Mo fibers having a square cross-section. With increasing growth rate (from 20 to 80 mm/h). the spacing, and size of the Mo fibers decreased. from approximate to2 to 1 mum (fiber spacing) and 800 to 400 nm (fiber size). X-ray microprobe analyse revealed hat the NiAl matrix contained essentially no Mo (