Durai T G, Das Karabi, Das Siddhartha
Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721302, India.
J Nanosci Nanotechnol. 2007 Jun;7(6):1980-4. doi: 10.1166/jnn.2007.753.
Composites consisting of Al-Zn/Al2O3 have been synthesized using high energy mechanical milling. High energy ball milling increases the sintering rate of the composite powder due to increased diffusion rate. Owing to the finer microstructure, the hardness of the sintered composite produced by using the mechanically milled nanocomposite powder is significantly higher than that of the sintered composite produced by using the as-mixed powder. The mean crystallite size of the matrix has been determined to be 27 nm by Scherrer equation using X-ray diffraction data. The powders have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and differential thermal analysis (DTA). The effect of high-energy ball milling and subsequent annealing on a mixture of Al and ZnO has also been investigated. DTA result show that the reaction temperature of Al-ZnO decreases with the increase in the ball milling time.
采用高能机械球磨法合成了Al-Zn/Al2O3复合材料。由于扩散速率增加，高能球磨提高了复合粉末的烧结速率。由于微观结构更精细，使用机械球磨纳米复合粉末制备的烧结复合材料的硬度明显高于使用混合粉末制备的烧结复合材料。利用X射线衍射数据，通过谢乐方程确定基体的平均微晶尺寸为27nm。通过X射线衍射（XRD）、透射电子显微镜（TEM）和差热分析（DTA）对粉末进行了表征。还研究了高能球磨和随后的退火对Al和ZnO混合物的影响。DTA结果表明，Al-ZnO的反应温度随球磨时间的增加而降低。
