高能球磨法制備納米晶Ni粉的研究

編號(hào)：CPJS00424

篇名：高能球磨法制備納米晶Ni粉的研究

作者：路承杰; 張振忠; 周劍秋; 張少明;

關(guān)鍵詞：高能球磨; 納米晶; 鎳粉; 非晶相;

機(jī)構(gòu)： 南京工業(yè)大學(xué)材料科學(xué)與工程學(xué)院; 南京工業(yè)大學(xué)材料科學(xué)與工程學(xué)院 江蘇南京; 江蘇南京;

摘要： 采用高能球磨法制備出了納米晶鎳粉,并利用X射線(xiàn)衍射儀(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)等分析檢測(cè)手段,研究了該納米晶鎳粉末的結(jié)構(gòu)、形貌和相的變化。結(jié)果表明,鎳粉末平均粒度和晶粒度隨球磨時(shí)間增加不斷減小,而應(yīng)變隨球磨時(shí)間增加不斷增大;當(dāng)高能球磨54h后,球磨產(chǎn)物為FCC結(jié)構(gòu)的鱗片狀多晶體,晶粒度為17nm左右,應(yīng)變?yōu)?.48%,顆粒尺寸為150～200nm;球磨時(shí)間增加至98h,產(chǎn)物中出現(xiàn)非晶相,但仍以多晶為主,晶粒尺寸為7nm,應(yīng)變?yōu)?.24%,粉末團(tuán)聚嚴(yán)重。 The structure, morphology and phase change of nanocrystalline nickel powders prepared by high energy ball milling were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results indicate that the average particle size and grain size of the nickel powders decrease and the strain of the powders increases with the increasing milling time. The flake nickel powders with grain size of 17 nm which are polycrystalline structure were obtained after...