(1. 沈陽工業(yè)大學(xué) 理學(xué)院，沈陽 110023；
2. 沈陽工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，沈陽 110023)
摘 要:
關(guān)鍵字: Mg納米粉；電弧放電法；氧化特性
of Mg nanopowders
（1. College of Science, Shenyang University of Technology,Shenyang 110023, China;
2. College of Material Science and Engineering, Shenyang University of Technology, Shenyang 110023, China）
Abstract:Mg nanopowders were prepared by arc discharging in Ar, H2 and Ar, CH4 and Ar atmosphere. The structure and morphology as well as oxidation resistance of the powders were studied by X-ray diffractometry(XRD), transmission electron microscopy(TEM), BET, chemical analysis, gas analysis, differential thermal and thermogravimetry analysis. The results show that the nanopowders consists of Mg and a small quantity of MgO, besides there exist also 2% C (mass fraction) in as-prepared sample in CH4 and Ar mixed atmosphere. The morphologies of nanoparticles are similar spheric shape and average sizes of nanoparticles are about 156, 195 and 181 nm, the specific surface areas are 22.12, 17.70 and 19.07 m2/g, the contents of oxygen are 6.9%, 7.4% and 5.5%. The oxidation resistance of the samples prepared in CH4 and Ar mixed atmosphere is the best, which is oxidized to MgO at about 550 ℃ in air.
Key words: Mg nanopowder; arc discharge; oxidation resistance
