本文選題：Al基非晶合金 + 氣體霧化　； 參考：《北京工業(yè)大學學報》2017年04期

【摘要】：針對3D打印用Al基非晶合金粉末的性能需求,利用惰性氣體霧化法制備Al_(86)Ni_7Er_5Co_1La_1合金粉末.通過調(diào)整過熱度、霧化氣壓、導流管直徑來分析不同霧化工藝參數(shù)對粉末粒徑的影響規(guī)律;利用激光粒度分析儀、X射線衍射儀(XRD)、掃描電子顯微鏡(SEM)和差示掃描量熱儀(DSC)對粉末的粒度分布、物相組成、表面形貌、微觀組織結(jié)構和熱穩(wěn)定性進行分析測試.研究表明:合金粉末的粒徑隨著霧化氣壓的增加、導流管直徑的減小和過熱度的增加而逐漸降低.當過熱度100℃、霧化氣壓9 MPa、導流管直徑3 mm時,細粉率最高,其中粒徑75μm粉末的質(zhì)量分數(shù)在70%以上.隨著粉末粒徑的減少,合金粉末的組織結(jié)構發(fā)生了如下轉(zhuǎn)變:fcc-Al+Al_(17)Er_2+未知相→非晶相+fcc-Al+Al_(17)Er_2+未知相→非晶相+fcc-Al→非晶相,粒徑小于25μm的粉末為完全的非晶態(tài).
[Abstract]:In order to meet the requirement of properties of Al based amorphous alloy powder for 3D printing, Al _ (86) Ni _ 7er _ 5Co _ 1La _ 1 alloy powder was prepared by inert gas atomization method. By adjusting the superheat, atomization pressure and the diameter of the guide pipe, the influence of different atomization process parameters on the powder particle size is analyzed. X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) were used to analyze and test the particle size distribution, phase composition, surface morphology, microstructure and thermal stability of the powder. The results show that the particle size of the alloy powder decreases with the increase of atomization pressure, the diameter of the tube and the superheat. When the superheat is 100 鈩，

本文編號：2084658