学科分类
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5 个结果
  • 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.

  • 标签: 再结晶温度 变形程度 纯钨 对数应变 轧制工艺 强度退化
  • 简介:摘要硬质TiC、TiN、Ti(CN)薄膜因具有相似的性质,故合称为TiN类薄膜。TiN类薄膜因具有高强度、高硬度、化学稳定性好、耐磨及防腐蚀等一系列优点,其涂层被广泛作用于机械工业中的刀具、模具等表面,成为具有巨大应用前景的涂层材料。TiN类陶瓷膜由于其独特的性能而成为当前材料表面研究热点之一。文章简要介绍了利用化学气相沉积(CVD)、物理气相沉积(PVD)、双辉技术及其它表面处理技术制备TiN类膜的研究进展,讨论了各种制备方法的工艺特点。

  • 标签: 表面技术 TiN类膜 制备工艺
  • 简介:Inthiswork,laserinducedtungstenplasmahasbeeninvestigatedintheabsenceandpresenceof0.6Tstatictransversemagneticfieldatatmosphericpressureinair.Thespectroscopiccharacterizationoflaserinducedtungstenplasmawasexperimentallystudiedusingspace-resolvedemissionspectroscopy.Theatomicemissionlinesoftungstenshowedasignificantenhancementinthepresenceofamagneticfield,whiletheionicemissionlinesoftungstenpresentedlittlechange.Temporalvariationoftheopticalemissionlinesoftungstenindicatedthattheatomicemissiontimeinthepresenceofamagneticfieldwaslongerthanthatintheabsenceofamagneticfield,whilenosignificantchangesoccurredfortheionicemissiontime.Thespatialresolutionofopticalemissionlinesoftungstendemonstratedthatthespatialdistributionofatomsandionswereseparated.Theinfluenceofamagneticfieldonthespatialdistributionofatomswasremarkable,whereasthespatialdistributionofionswaslittleinfluencedbythemagneticfield.Thedifferentbehaviorsbetweenionsandatomswithandwithoutmagneticfieldinairwererelatedtothevariousatomicprocessesespeciallytheelectronsandionsrecombinationprocessduringtheplasmaexpansionandcoolingprocess.

  • 标签: 等离子体 激光诱导 静磁场 空气 原子发射光谱
  • 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)。

  • 标签: TIALN 并且 TiAlSiN 涂层 AFM 3D 表面微地形学 高度分析
  • 简介:Higher-κdielectricLaLuO_3,depositedbymolecularbeamdeposition,withTiNasgatestackisintegratedintohigh-mobilitySi/SiGe/SOIquantum-wellp-typemetal-oxide-semiconductorfieldeffecttransistors.Thresholdvoltageshiftandcapacitanceequivalentthicknessshrinkareobserved,resultingfromoxygenscavengingeffectinLaLuO_3withTi-richTiNafterhightemperatureannealing.Themechanismofoxygenscavenginganditspotentialforresistivememoryapplicationsareanalyzedanddiscussed.

  • 标签: 金属氧化物 场效应晶体管 清除作用 高流动性 锗/硅 量子阱