简介:Puretungsten(PW)andW-1wt%La2O3(WL10)werepreparedbypowdermetallurgicalroutefollowedbytheswaging+rollingprocess.Thelogarithmicstrainsare0,0.37,0.58,and0.98forWL10and0,0.58forPW.Heattreatmentswereperformedattemperaturesvariedfrom1,573to2,173Ktodeterminetherecrystallizationtemperature.Recrystallizationtemperaturesare1,973and2,173KforWL1(logarithmicstrainof0.37)andWL3(logarithmicstrainof0.98),respectively.ButinthecaseofWL2(logarithmicstrainof0.58),fullrecrystallizationisnotachievedattemperatureofabove2,173K.Furthermore,therecrystallizationtemperatureofPWwithlogarithmicstrainof0.58isatleast300KlowerthanthatoftheequivalentWL10sample.Moreover,theincreaseofrecrystallizationtemperatureinhibitsthestrengthdegradationofWL2:sampleslose4%and22%strengthwhenannealedat1,573and1,973Kcomparedwithroomtemperature(RT)sample.Finally,thetextureevolutionfortheswaged+rolledWL10issignificantlyrelatedtothedeformationdegree:thedominatedorientationis<001>forWL2while<110>forWL3.
简介:Inthiswork,laserinducedtungstenplasmahasbeeninvestigatedintheabsenceandpresenceof0.6Tstatictransversemagneticfieldatatmosphericpressureinair.Thespectroscopiccharacterizationoflaserinducedtungstenplasmawasexperimentallystudiedusingspace-resolvedemissionspectroscopy.Theatomicemissionlinesoftungstenshowedasignificantenhancementinthepresenceofamagneticfield,whiletheionicemissionlinesoftungstenpresentedlittlechange.Temporalvariationoftheopticalemissionlinesoftungstenindicatedthattheatomicemissiontimeinthepresenceofamagneticfieldwaslongerthanthatintheabsenceofamagneticfield,whilenosignificantchangesoccurredfortheionicemissiontime.Thespatialresolutionofopticalemissionlinesoftungstendemonstratedthatthespatialdistributionofatomsandionswereseparated.Theinfluenceofamagneticfieldonthespatialdistributionofatomswasremarkable,whereasthespatialdistributionofionswaslittleinfluencedbythemagneticfield.Thedifferentbehaviorsbetweenionsandatomswithandwithoutmagneticfieldinairwererelatedtothevariousatomicprocessesespeciallytheelectronsandionsrecombinationprocessduringtheplasmaexpansionandcoolingprocess.
简介:听,TiAlN,和TiAlSiN涂层在YT14切上被准备有CAIP(阴极弧离子plating)的工具表面,表面形态学和阶段与FESEM(地排放扫描电子显微镜学)被分析,并且XRD(X光检查衍射),分别地并且象3D那样的涂层参数出现微地形学,谷物尺寸,表面高度,层次,侧面高度,和力量光谱密度,等等,与AFM(原子力量显微镜)被测量。结果证明锡,TiAlN,和TiAlSiN涂层的阶段是锡,TiN+TiAlN,TiN+Si3N4+TiAlN,分别地,当时表面粗糙S分别地,锡,TiAlN,和TiAlSiN涂层的是75.3,98.9,和42.1nm并且粗糙深度S分别地,k是209,389,和54nm平均谷物尺寸的顺序是TiAlN>锡>TiAlSiN。忍受索引S分别地,锡,TiAlN,和TiAlSiN涂层的双性人是0.884,1.01,和0.37,忍受能力的表面的顺序是TiAlN>锡>TiAlSiN。在更低的波长(102-103nm),力量光谱密度有锡的某个关联,和顺序>TiAlN>TiAlSiN,当关联在更高的波长是低的时(>103nm)。
简介:Higher-κdielectricLaLuO_3,depositedbymolecularbeamdeposition,withTiNasgatestackisintegratedintohigh-mobilitySi/SiGe/SOIquantum-wellp-typemetal-oxide-semiconductorfieldeffecttransistors.Thresholdvoltageshiftandcapacitanceequivalentthicknessshrinkareobserved,resultingfromoxygenscavengingeffectinLaLuO_3withTi-richTiNafterhightemperatureannealing.Themechanismofoxygenscavenginganditspotentialforresistivememoryapplicationsareanalyzedanddiscussed.