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首页> 外文会议>International Symposium on Metastable and Nano-Materials(ISMANAM-2005); 20050703-07; Paris(FR) >Mechanical alloying of Ni_3Fe in the presence of Ni_3Fe nanocrystalline germs
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Mechanical alloying of Ni_3Fe in the presence of Ni_3Fe nanocrystalline germs

机译：Ni_3Fe纳米晶病菌存在下Ni_3Fe的机械合金化

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摘要

The influence of nanocrystalline germs on the production of the Ni_3Fe intermetallic compound by mechanical alloying is reported. These germs consist in Ni_3Fe nanocrystalline particles previously obtained by mechanical alloying which have been added to the Ni-Fe mixture: 0.8(3Ni + Fe) + 0.2Ni_3Fe = Ni_3Fe. The powder mixture was milled in a planetary mill in argon atmosphere. Several milling times have been used ranging from 2 to 8 h. A Ni-Fe mixture at nominal composition of Ni_3Fe compound was milled in the same conditions, as blind samples. A heat treatment at 350℃ for 0.5,1, 2 and 4 h has been performed in order to remove the internal stresses induced by milling and to improve the solid-state reaction. The formation of the Ni_3Fe phase was checked by X-ray diffraction and magnetic measurements. The germs inoculation improves the synthesis of the Ni_3Fe phase by combined mechanical alloying and annealing technique. This influence is more effective for short milling times (typically lower than 4 h). For samples milled more than 4 h the influence of the germs inoculation is more reduced, due to the Ni_3Fe germs self-formation by milling.
机译：据报道，纳米晶细菌对通过机械合金化生产Ni_3Fe金属间化合物的影响。这些细菌由先前通过机械合金化获得的Ni_3Fe纳米晶体颗粒组成，这些颗粒已添加到Ni-Fe混合物中：0.8（3Ni + Fe）+ 0.2Ni_3Fe = Ni_3Fe。将该粉末混合物在氩气氛中在行星式研磨机中研磨。已经使用了2到8小时不等的研磨时间。在相同的条件下，将Ni_3Fe化合物标称组成的Ni-Fe混合物作为盲样品进行研磨。为了消除研磨引起的内应力并改善固态反应，已在350℃下进行了0.5、1、2和4 h的热处理。通过X射线衍射和磁测量来检查Ni_3Fe相的形成。细菌接种通过机械合金化和退火技术相结合，改善了Ni_3Fe相的合成。这种影响对于较短的铣削时间（通常小于4小时）更有效。对于研磨时间超过4小时的样品，由于通过研磨自生的Ni_3Fe细菌会进一步减少细菌接种的影响。

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