简介:Sm_(0.9)Pr_(0.1)Fe_xandSm_(1-x)Nd_xFe_(1.9)的结构,磁化,和磁伸缩变瘦电影用X光检查衍射,颤动的样品磁强计,和光伸臂方法被调查了。Sm_(0.9)Pr_(0.1)Fe_xthin电影的结构由一张Sm-Pr-Fe无定形相组成,这被发现什么时候x≤2.69并且Sm_(1-x)Nd_xFe_(1.9)的薄电影由一张Sm-Nd-Fe无定形相组成。有Fe内容的增加的在里面飞机磁化ofSm_(0.9)Pr_(0.1)Fe_x薄电影增加,和茶碱飞机coercivity的低价值发生在1.62≤x≤的范围2.28。当时,有增加Fe的磁伸缩价值ofSm_(0.9)Pr_(0.1)Fe_x薄电影增加满足x≤1.94并且减少什么时候x>1.94。Sm_(1-x)Nd_xFe_(1.9)的在里面飞机磁伸缩在低磁场下面的薄电影被Nd的替换为Sm改进了什么时候x=0.2。
简介:AnewtypeofDZ9000EOxygenGaseousHVOFsystem(GHVOF)isdevelopedwhichcanreducethecostofcoatingsandincreasethein-situremovabilitytoadaptvariousworkingconditions.Thewholesystemiseconomical,whichenablesthesystemtomeettherequirementofsprayingmediumorlowcostHighVelocityOxy-Fuel(HVOF)coatingsformediumandsmalljobshops.ThedepositedcermetscoatingsbytheDZ9000EsystemhavegoodperformancewithaveragemicrohardnessHV0.2ofmorethan1000andthebondstrengthbetweencoatingandsubstrateofgreaterthan50MPa.
简介:Basedonthemethodofartificialneuralnetwork,anewapproachhasbeendevisedtopredictthemechanicalpropertyofE4303electrode.Theoutlinedpredicationmodelfordeterminingthemechanicalpropertyofelectrodewasbuiltupontheproductiondata.Theresearchleveragesabackpropagationalgorithmastheneuralnetwork'slearningrule.Theresultindicatesthattherearepositivecorrelationsbetweenthepredictedresultsandthepracticalproductiondata.Hence,usingtheneuralnetwork,predicationofelectrodepropertycanberealized.Forthefirsttime,thisresearchprovidesamorescientificmethodfordesigningelectrode.
简介:用销-盘摩擦磨损试验机考察Z71E压铸镁合金在载荷为10~50N时的高温摩擦学行为,利用光学显微镜(OM)和扫描电镜(SEM)对磨损表面和亚表面进行分析,通过光学显微镜(OM)、X射线衍射仪(XRD)、差示热扫描(DSC)等对AZ71E合金的高温微观结构、热稳定性和力学性能进行研究。结果表明:随着载荷和滑动距离的增加磨损率增大,而摩擦系数则随着载荷的增加而减少。在低载荷时,AZ71E镁合金的磨损机制主要是磨粒磨损;在150℃和高载荷下,粘着磨损和轻微的剥层磨损是主要的磨损机制;而在200℃及高载荷下,镁合金的主要磨损机制是严重的剥层磨损和熔融磨损。AZ71E镁合金的高温摩擦学性能提高的内在机制是AZ71E镁合金中第二相Al11Ce3使镁合金的高温拉伸和延展性能显著提高。