Preparation of Fe/B powders by mechanical alloying
Preparation of Fe/B powders by mechanical alloying
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DOI：
10.1016/j.jssc.2003.01.001
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发表时间：
2004-02
影响因子：
3.3
通讯作者：
J. Abenojar;F. Velasco;J. M. Mota;M. Martínez
中科院分区：
文献类型：
--
作者：
J. Abenojar;F. Velasco;J. M. Mota;M. Martínez
硼含量高的钢作为废物容器中的中子屏蔽和核反应堆中的控制吸收剂是有价值的。本研究的目的是通过机械合金化获得含50%硼（按重量计）的铁粉，然后获得粉末冶金材料。将基本粉末在惰性气氛中在高能磨机中混合36小时。样品取出的时间间隔，和粉末的特征在于差热分析，X-射线衍射和电子显微镜。将在不同研磨间隔取出的Fe/B粉末用进一步添加的铁稀释至最终硼含量为10%。将混合物在500 MPa下单轴压实;验证它们的绿色密度，并将它们在氩气中在1150°C下烧结。它们的物理性能（密度和尺寸变化）和弯曲强度进行了评价和微观结构的研究和断裂试验进行。
Steels with a high boron content are valuable as a neutron shield in waste containers and as control absorbers in nuclear reactors. The purpose of this study was to obtain by mechanical alloying an iron powder with 50% boron (by weight) and then powder-metallurgy materials. The elementary powders were mixed in a high-energy mill for 36h in an inert atmosphere. Samples were withdrawn at intervals, and the powder was characterized by differential thermal analysis, X-ray diffraction and electron microscopy. The Fe/B powders withdrawn at different intervals of milling were diluted with further additions of iron up to a final content of 10% boron. The mixtures were uniaxially compacted at 500MPa; their green density was verified, and they were sintered in argon at 1150°C. Their physical properties (density and dimensional change) and bending strength were evaluated and microstructural studies and fracture tests were performed.