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首页> 外文会议>Researches in Powder Metallurgy >Ni_3Fe Mechanically Alloyed: 'Shock Mode' versus 'Friction Mode'
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Ni_3Fe Mechanically Alloyed: 'Shock Mode' versus 'Friction Mode'

机译：Ni_3Fe机械合金化：“冲击模式”与“摩擦模式”

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Ni_3Fe powder has been obtained by high energy ball milling from elemental powders. We used two extreme conditions for milling: "friction mode" - friction between powder and ball/vial and "shock mode" - direct impact of ball to powders. The influence of milling mode - friction and shock - was investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It was observed that the Ni_3Fe grain size obtained by "friction mode" after 30 hours of milling was around 10 nm. For "shock mode" milling the average grain sizes was around 17 nm after 20 hours. The grain size was calculated using Williamson-Hall formula for both, "shock mode" and "friction mode" of milled powders and Scherrer formula for annealed powders. The powders were subjected to an annealing (30 min. at 350 ℃) in order to eliminate the internal stress accumulated to the milling process and to finish the Ni_3Fe phase formation.
机译：Ni_3Fe粉末是通过高能球磨从元素粉末中获得的。我们使用了两个极端的磨削条件：“摩擦模式”-粉末与球/小瓶之间的摩擦力和“冲击模式”-球对粉末的直接冲击。通过X射线衍射（XRD）和扫描电子显微镜（SEM）研究了铣削模式的影响-摩擦和冲击。观察到，在研磨30小时后通过“摩擦模式”获得的Ni_3Fe晶粒尺寸为约10nm。对于“冲击模式”研磨，20小时后的平均晶粒尺寸约为17 nm。对于研磨粉的“休克模式”和“摩擦模式”，均使用Williamson-Hall公式计算晶粒尺寸；对于退火粉末，使用Scherrer公式计算晶粒尺寸。为了消除积累在研磨过程中的内应力并完成Ni_3Fe相的形成，对粉末进行退火（在350℃下进行30分钟）。

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