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《Transactions of Beijing Institute of Technology》 2012-04
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Preparation of Nanostructured CoNiCrAlY Powder and Investigation on Its Oxidation Behavior

ZHANG Lin-wei,WANG Lu,WANG Quan-sheng,NING Xian-jin(School of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China)  
The nanostructured CoNiCrAlY powder was prepared using the technology of planet mechanical milling.The oxidation behavior of conventional and nanostructured powder at 1000℃ was investigated by the measures of X-ray diffraction and scanning electron microscope.The results show that the technique of planet mechanical milling could be used to prepare nanostructured powder and the average grain size of CoNiCrAlY powder is 11.2nm after milled for 30h.The anti-oxidation capability of CoNiCrAlY nanostructured powder is well improved.During the static oxidation of constant temperature at 1000℃ for 100h,the nanostuructured powder forms only a single αAl2O3 scale,while the conventional powder forms mixed oxide scale composed of αAl2O3 scale,mixed oxide and a small amount of θAl2O3.
【Fund】: 国家教育部高等学校博士学科点专项科研基金资助课题(20101101120030)
【CateGory Index】: TB383.1
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