简介：ＣｕｒｉｅＴｅｍｐｅｒａｔｕｒｅｏｆＡｍｏｒｐｈｏｕｓＦｅＳｉＢａｎｄＦｅＷＳｉＢＡｌｏｙｓＷａｎｇＬｉｎｇｌｉｎｇ，ＺｈａｏＬｉｈｕａ，ＨｕＷａｎｇｙｕ（王玲玲）（赵立华）（胡望宇））ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＨｕｎａｎＵｎ...

简介：磁性的元素Fe，公司和Ni的线性热扩大(CLE)的系数用与MATLAB计算相结合的理论模型从试验性的信息被估计。模型参数能精确地被决定，并且估计的数据在对试验性的结果的好同意。便于评价，热扩大的理论被使用把CLE分开成它的无磁性、磁性的部件。对CLE的无磁性的贡献的计算基于MnBi/NdFeB混血儿的修改Grc性质结合的磁铁都逐渐地减少，当混合磁铁的密度几乎线性地改善时。在293-398的一个温度范围?K，混合磁铁的coercivity温度系数从0.59逐渐地改善?%比较。建模和频率与二低角落频率认为压力消除阀门是一个秒顺序系统是合理的试验性的结果表演。PID控制，死了的乐队赔偿控制和鷸?鷸？？

简介：ThesolidsolubilityofCe、La、SmandNdinFeorNiatvarioustemperaturewasdeterminedbymeansofadiffusion-couplemethodwiththeaidofanelectronprobemicroanalyzer.Twomethods,namelyareamethodandwholerangemethod,wereproposedfordataprocessinginthepresentpaper.Theprincipleandre-latedproblemsintheexperimentaldeterminationofthesolidsolubilityofrare-earthelementsinFeorNibyuseoftheabovementionedmethodswerealsodiscussed.

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简介：TheeffectsofheattreatmentsonthephasetransformationbehaviorofTi49Ni49.5Fe1V0.5andTi48Ni48.5Fe1V2.5alloyswereinvestigated.TheresultsindicatethatthealloyssubjectedtodifferentheattreatmentshaveB2structureatroomtemperature.AllthespecimensexhibitatwostageB2→R→B190martensitictransformationoncooling,butaB190→B2one-stagereversemartensitictransformationonheatingexceptagedA1alloy,whichundergoesanabnormaltwo-stagetransformationuponheating.ThephasetransformationtemperaturesareaffectedbyheattreatmentsandVcontent,whichcanbeattributedtothevariationofthesecond-phaseparticlescontentinthematrix.

简介：X-raydiffraction(XRD)anddifferentialscanningcalorimetry(DSC)wereusedtoinvestigatethecrystallizationprocessofamorphousAl90TMxCe10-x(atomfractionin%;TM=FeorNi;x=3,5)alloys.AgingeffectswereexaminedbyX-raydiffraction.ThestructurecorrespondingtotheprepeakfortheamorphousAl90Fe5Ce5alloyismorestablethantheamorphousmatrix,butitisnotstableforamorphousAl90Ni5Ce5alloyduringthefirstcrystallizationstageandevendecomposesatroomtemperature.AlthoughbothAl-NiandAl-Fehavestrongchemicalbonding,thecrystallizationonsettemperatureofamorphousAl-Fe-CealloysismuchhigherthanthatofamorphousAl-Ni-Cealloys,whichislikelycausedbythedifferentstabilityofthestructurecorrespondingtotheprepeak.ThecrystallizationonsettemperatureincreasesasCe/NiratioincreasesinamorphousAl90NixCe10-xalloys,whereasitdecreasesasCe/FeratioincreasesinamorphousAl90FexCe10-xalloys.AbetteratomicpackingproducesasCecontentincreasesbecauseofthesizemismatchinAlNi-CesystemsandasFecontentincreasesbecauseoftheincreasingFecentralstructuralunits.

简介：Inthiswork,transformationbehaviorsandmechanicalpropertiesofcold-rolledshapememoryalloyTi50Ni49Fe1bysevereplasticdeformation(SPD)wereintensivelyinvestigated.Thephasetransformationbehaviors,phaseanalysis,andmicrostructureswerecharacterizedbydifferentialscanningcalorimetry(DSC),X-raydiffraction(XRD),andtransmissionelectronmicroscopy(TEM),respectively.TensiletestingwasperformedtoanalyzetheeffectofSPDonthemechanicalpropertiesandshapememoryofTi50Ni49Fe1alloy.Whenthethicknessreductionisbeyond30%,themartensitictransformationissuppressed.Aftercold-rolling,thealloyismainlycomposedofB2parentphaseswithsomestress-inducedmartensiticB190phases,andhighdensityofdislocationsaregeneratedandthegrainsareobviouslyrefined.Theyieldstressrbsignificantlyraisesfrom618MPaof0%coldrollingto1,338MPaof50%SPD.Shape-memoryeffectincreasesfrom6.5%withoutcoldrollingto8.5%after30%SPD,ascribedtotheinduceddefectsincoldrolling.ThoseresultsindicatethatTi50Ni49Fe1alloyhasimprovedmechanicalpropertiesandpotentialcommercialapplicationsafterSPD.

简介：Fe3AlandCr18-Ni8steelwerebondedinvacuumandaninterfacewasformedbetweenFe3AlandCr18-Ni8steel.Stressdistributionatthediffusion-bondedinterfacewasresearchedbynumericalsimulationandfiniteelementmethod(FEM).TheresultsindicatedthatthepeakstressappearedattheinterfacenearCr18-Ni8steelside.Thisisthekeyfactortoinducecrackatthisposition.Withtheenhancementofheatingtemperature,thepeakstressatthebondedinterfaceincreases.Whenthetemperatureis1100℃,thepeakstressisupto65.9MPa,whichisbiggerthanthatat1000℃by9.4%.Inaddition,thepeakstressbecomesbiggerwiththeincreaseofthethicknessofbasemetalfrom1mmto8mm.Whilethethicknessismorethan8mm,thepeakstressvariesslightlywiththechangeofthethickness.

简介：ThemicrostructuresandcrystallizationbehaviorofTi–47at%Ni–3at%Feshapememoryalloywireundertheconditionofseverecolddrawingatroomtemperatureanddifferentpost-deformationannealingprocesseswereintensivelyinvestigatedusingtransmissionelectronmicroscope(TEM)anddifferentialscanningcalorimetry(DSC).ItisindicatedthattheamorphousphaseisdominantintheTi50Ni47Fe3wireafterthecolddrawingof78%arealreduction.Thecriticaltemperatureforrecrystalizationisdeterminedatabout300°C.Theaveragegrainsizegrowsfrom7upto125nmwhenannealingtemperaturerisesfrom300to500°C.Post-deformationannealingprocessexertssignificantinfluenceonthecrystallizationtemperaturewhichclimbsupwiththeincreaseofannealingtemperature.

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简介：Basedonclustervariationmethod(CVM)andnaturaliterationmethod(NIM),order-disorderphasetransitionintheintercalationcompoundsM1/2TiS2issimulatedbycomputer.Thefavorableconditions,underwhich3a0×a0superstructureisformed,aregiven,andtheresultsareingoodagreementwiththeexperimentsandtheoreticalcalculations.TherelationshipbetweencriticaltemperatureandM-ion-vacancyinteractionparameterislinear.

简介：激光冲击强化是一种新型表面处理技术,利用高功率激光束冲击金属零件表面,在零件表面形成较大的残余压应力,可有效改善零件的疲劳性能。以发动机1Cr11Ni2W2MoV叶片为研究对象,对其进行了激光冲击强化处理,研究强化处理对材料的微观组织和疲劳性能的影响。研究结果表明：相比未处理试样,激光冲击强化在1Cr11Ni2W2MoV叶片材料表层形成较大的残余压应力,表层晶粒更为细化,叶片的疲劳寿命提高1.7倍。

简介：在聚丙烯氰基炭纤维上电沉积Ni-Fe合金催化剂,并采用X-射线衍射和拉曼光谱方法考察其对热处理炭纤维石墨化的催化性能。结果表明：Ni-Fe合金在低温条件下对炭纤维石墨化有着优异的催化性能。附有Ni-Fe合金（铁的质量分数为57.91%）的聚丙烯腈基炭纤维经过1250℃热处理后其石墨化度为69.0%,而空白样炭纤维经过2800℃热处理后其石墨化度仅为30.1%。在相同温度下,Ni-Fe合金对碳纤维石墨化的催化性能优于纯铁和纯镍的,这表明Ni和Fe元素之间存在协同催化作用。同时,研究表明Ni-Fe合金对石墨化的催化遵循溶解再析出机理。

简介：Mg2Ni氢存储合金的电气化学的性质上的镍涂层的效果在这份报纸被介绍。X光检查衍射(XRD)和扫描电子显微镜(SEM)技术被采用检验赤裸、Ni涂的Mg2Ni合金的水晶结构和表面形态学。合金的电气化学的性质被周期的voltammetry(CV)和电气化学的阻抗光谱学(EIS)描绘。结果显示出那Ni涂层不仅减少费用转移抵抗，而且减少为Mg2Ni合金的H原子散开抵抗。Ni涂层有效地改进了分泌物能力，这也被发现，但是减少同样综合的Ni涂的Mg2Ni合金的骑车的表演。分泌物电流在同样综合的Ni涂的Mg2Ni合金的骑车的表演上有大影响。

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简介：１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｎｉｃｋｅｌａｌｏｙｓａｎｄｃｏｍｐｌｅｘｅｓａｒｅｗｉｄｅｌｙｕｓｅｄａｓｍａｇｎｅｔｉｃ，ｏｐｔｉｃａｌ，ｎｕｃｌｅａｒａｎｄｓｕｐｅｒｃｏｎｄｕｃｔｉｎｇｍａｔｅｒｉａｌｓ［１，２］．Ｍａｎｙｎｉｃｋｅｌｃｏｍ...

简介：１ＩｎｔｒｏｄｕｃｔｉｏｎＮｏｒｆｌｏｘａｃｉｎｂｅｌｏｎｇｓｔｏｔｈｅｃｏｍｐｏｕｎｄｏｆｔｈｅｓｅｒｉｅｓｏｆｃａｒｂｏｓｔｙｒｉｌｃｏｎｔａｉｎｉｎｇｆｌｕｏｒｉｎｅ．Ｉｔｉｓａｂｒｏａｄｓｐｅｃｔｒｕｍａｎｔｉｍｉｃｒｏｂｉａｌ，ａｎｄ...

简介：采用电沉积法在T91钢基体上制备Ni与Ni/CeO2镀层,研究该镀层试样在温度分别为750℃和800℃,ω（Ar）=90%、ω（H2O）=10%气氛中的氧化行为。测量试样氧化动力学曲线并利用X射线衍射仪测定样品氧化后表面产物的相,利用带能谱分析功能EDS的扫描电镜SEM观察样品表面和截面形貌。结果表明：Ni和Ni/CeO2镀层对T91钢高温水蒸气氧化具有一定防护作用;此外,Ni/CeO2镀层中纳米CeO2颗粒抑制了氧化膜的开裂,改善了氧化膜的黏附性,提高了T91钢镀Ni试样的耐高温水蒸气氧化性能。

简介：通过化学沉积法制备Ni-P、Ni-Mo-P单镀层以及与其成分相同的Ni-P/Ni-Mo-P双镀层。采用纳米压痕法和AFM分析测量镀层表面和截面的残余应力,并用电化学法评估镀层在10%HCl溶液中的腐蚀行为,以获得镀层残余应力与腐蚀行为之间的关系。结果表明:Ni-P单镀层和Ni-P/Ni-Mo-P双镀层表现为残余压应力,分别为241和206MPa;Ni-Mo-P单镀层呈现出257MPa的残余拉应力。残余压应力阻止镀层中孔洞的生长,保护镀层的完整性。Ni-P/Ni-Mo-P双镀层比它们的单镀层具有更好的耐蚀性。此外,镀层的应力状态影响其腐蚀形式。

简介：NanocrystallineNi粉末成功地被制作由机械地在有1个wt.%Y_2O_3粒子的低温实验法的温度(cryomilling)的milling。试验性的结果证明了Ni谷物尺寸面对Y_2O_3粒子在cryomilling的2h以后被归结为25nm。cryomilledNi/Y_2O_3粉末能维持他们的nanocrystalline结构直到900℃，否则融化中的62%个Ni指。有约100nm的athermally稳定的谷物尺寸的体积nanocrystallineNi/Y_2O_3材料被cryomilling生产，冷均衡说的紧迫，由热均衡说的压列在后面。体积nanocrystallineNi/lwt.%Y_2O_3的微坚硬是315DPH，它二倍高于常规Ni的。