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通过计算磨球运动的最大速度估算了Mg-Ni粉末在球磨过程中可能达到的最高温度,并采用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱分析仪研究了样品经400 r／min球磨不同时间后的相结构、形貌及微区成分的变化规律．结果表明：当球磨速度为400 r／min时,可使落入两个直径为20 mm的碰撞磨球之间、质量为0.033 3 g的粉末温度从298 K升到932 K．利用实验得出的片状金属的质量(0.015～0.025 g)推算出样品在400 r／min球磨时的温度变化范围为845.6～1 409.4 K,使镁粉熔化的最小球磨速度为269 r／min,经400 r／min球磨15 h后,Mg-Ni样品由成分不均的晶体相组成,球磨35 h后则转变为成分均匀的非晶体．图4,表2,参5．
The maximum temperature of Mg-Ni powder during milling can be estimated by calculating the maximum velocity of the ball. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy spectrum analyzer 400 r / min ball milling at different times after the phase structure, morphology and micro-composition changes. The results show that when the ball mill speed is 400 r / min, it can fall into the collision ball with two diameters of 20 mm, and the powder with the mass of 0.033 3 g rises from 298 K to 932 K. Based on the mass of sheet metal (0.015-0.025 g) obtained from the experiment, the temperature range of the sample during milling at 400 r / min was calculated to be 845.6-1 409.4 K, and the minimum ball milling speed to melt the magnesium powder was 269 r / min After milling at 400 r / min for 15 h, the Mg-Ni samples were composed of non-uniform crystal phases, and the powders were transformed into the non-uniform crystals after ball milling for 35 h. Figure 4, Table 2, reference 5.