简介：涡轮叶片在X射线无损检测时，X射线底片上存在黑白线显示。运用视频显微镜、光学显微镜对叶片黑白线显示部位的表面形貌和显微组织进行了观察分析。结果表明，黑白线显示是由于陶瓷型芯表面错位或微裂纹，使得叶片内腔表面存在具有一定高差的台阶。而陶瓷型芯表面形成错位或微裂纹主要与型芯表面质量和材料高温强度有关。通过控制陶瓷型芯材料纯度和粒度，选择合适的工业氧化铝填料以及加强压芯工艺参数和修芯工艺过程控制，提高型芯表面质量和高温强度，可明显减少甚至消除X射线黑白线显示。

简介：BasedontheMiedemamodelandExtendedMiedematheory,theformationenergiesofdifferentsolutecomponentsinEr-XbinarysystemandAl-Er-Xternarysystemswerecalculated.TheresultsshowthatthevariationoferbiumcontenthaslittleinfluenceonthechancerateoftheformationAl-ErcompoundintheAl-Mg-Mn-Zr-Ersystem.ThecalculatedformationenergiesintheEr-XbinarysystemandAl-Er-XternarysystemsindicatethatAl3Erphasecantakepriorityofdepositing,Al-Er-Zrternarycompoundsmayalsofoundwhichagreeswiththeexperimentalresultsinreferences.TheconsistencyofcalculationandexperimentprovesthattheintermetalliccompoundsintheAl-Mg-Mn-Zr-ErsystemcanbepredicteddirectlybycalculatingtheformationenergiesofthereactionsinEr-XbinarysystemandAl-Er-XternarysystemswiththeMiedemamodelandExtendedMiedematheory.

简介：Ｘ－ｒａｙＤｏｕｂｌｅ－ｃｒｙｓｔａｌＤｉｆｆｒａｃｔｏｍｅｔｅｒｗｉｔｈＨｏｒｉｚｏｎｔａｌＳｌｉｔｓａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎｓＸｕＪｉｎｇｙａｎｇａｎｄＺｈｕＮａｎｃｈａｎｇ徐景阳，朱南昌（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｌｅｏｆＭｅｔａ...

简介：MgTixNi(x=0,0.1,and0.2)alloysweresuccessfullypreparedbymechanicalalloying(MA),andtheinfluenceofmillingtimeontheelectrochemicalcharacteristicsoftheelectrodeswasdiscussed.MgTixNialloysafter90hmillingdisplayedthebestelectrochemicalperformance.TheX-raydiffractionpatternsshowedthatthealloyball-milledfor90hwasamorphouswithawideneddiffractionpeak.Thecharge-dischargetestsindicatedthatthesealloyshadgoodelectrochemicalactivationproperties,andtheMgTi0.2Nialloyelectrodeexhibitedthebestcycleperformance.TheinitialdischargecapacityoftheMgTi0.2Nialloyreachedupto401.1mAh·g-1,andtheretentionrateofcapacitywas31.0%after30cycles,muchhigherthanthatofMgNi(17.3%).TheTafelpolarizationcurvesrevealedthatTiadditioncouldenhancetheanticorrosionperformanceofthesealloysinalkalisolution,whichwasresponsiblefortheamelioratedcyclicstabilityofthesealloyelectrodes.

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：由七0四厂弋陕西华电材料科技有限公司）研究所承担研制的“HBT-200固态脉冲形成线”项目是为用户单位研制的新型储能器材。该项目利用高介电常数陶瓷聚合物复合材料作为储能介质制作脉冲形成线，具有储能密度高、无泄漏，可简化系统结构等特点。该项目的创新开发了一种介质均匀、

简介：在这份报纸，纺纱冰上的无磁性的Y离子的冲淡效果加重Dy2Ti2O7由红外线并且拉曼系列和磁化大小被调查。与温度弄软减少的异常声子在父母被发现并且冲淡除了之外，做的混合物，和Y能放松弄软声子233附近的红外模式?厘米<啜class=“a-plus-plus”>显示在纺纱冰材料联合的强壮的phononphonon的1,。当冲淡的水平不很高时，磁化大小表明无磁性的杂质严重地不处于扎根的状态影响纺纱冰规则。然而，大量冲淡提高混乱并且因为集体旋转扭动簇不再是可得到的，打破纺纱冰状态。

简介：ＳｉｌｉｃｏｎＥｐｉｔａｘｉａｌＷａｆｅｒｆｏｒＸＢａｎｄＤｏｕｂｌｅＲｅａｄ－ｔｙｐｅＤＤＲＩＭＰＡＴＴＤｉｏｄｅｓｂｙＡｔｍｏｓｐｈｅｒｅ／ＬｏｗＰｒｅｓｓｕｒｅＧｒｏｗｔｈＴｅｃｈｎｉｑｔＷａｎｇＸｉａｎｇｗｕａｎｄＬｕＣｈｕｎｙｉ王向武，陆春...

简介：Anewseriesofrareearthcompounds,Y2-xErxMo4O15(x=0.0-2.0),weresynthesizedandtheirstructuresweredeterminedbypowderX-raydiffraction(XRD).RietveldanalysisofXRDpatternsrevealsthatthecompoundsofthisseriescrystallizeinmonoclinicsystemwithspacegroupP21/c.Thelatticeparametersa,b,c,βandtheunitcellvolumeVde-creaselinearlywithincreasingErcontent.Thethermalexpansionpropertiesofthesecompoundswerestudiedunderhigh-temperatureXRD.PositivethermalexpansionsofcompoundsY2-xErxMo4O15arefoundtobeanisotropicalongthethreecrystallographicdirectionswhereaandcaxesexpandwhilebaxiscontractsinthewholetemperaturerange.Byanalysisofdata,theexpansionofweakbandMo2-O14withrisingtemperatureshouldberesponsibleforpositivethermalexpansion.

简介：近日，从江西赣州市工业和信息化委员会公布的《赣州市2010年度100个（第一批84个）工业投资重点高度项目情况表》获悉，赣州逸豪实业有限公司投资35000万元、于赣州市章贡区建设年产1万吨高档电解铜箔，其中一条年产2500吨铜箔生产线已经开始试运行。

简介：Mgx(Ti0.9Zr0.2Mn1.5Cr0.3)(x=20%，30%，40%)(集体部分)合成粉末被反应的球milling与氢和他们的氢存储性质准备，微观结构被XRD，SEM和pressure-composition-temperature调查测量。结果证明composites在553K和好加氢动力学有3.83%-5.07%氢能力，甚至在房间温度。在他们之中，milledMg-30%(Ti0.9Zr0.2Mn1.5Cr0.3)合成当它能快速在373K吸收2.1%氢，有最高的加氢动力学，3.5%在在473K的2000s，在3MPa氢压力下面在553K在60s弄平3.26%。改进加氢性质来自粒子在Mg粒子的表面上一致地驱散的Ti0.9Zr0.2Mn1.5Cr0.3的催化效果。

简介：PolycrystallinesamplesofLa12x(Sr12yAgy)xMnO3(y=0.0,0.2,0.4,0.6,1.0)werepreparedbythesolid-statereactionmethod.ThetemperaturestabilityofmagnetoresistanceandmagnetoresistanceenhancementinLa1-x(Sr1-yAgy)xMnO3systemwithbothunivalentandbivalentelementsdopedatAsiteandwithunchangedvalueofMn3+/Mn4+ratiowereexploredthroughthemeasurementsofX-raydiffractionpatterns,magnetiza-tion-temperature(M-T)curves,resistivity-temperature(q-T)curvesandmagnetoresistance-temperature(MR-T)curves.Theresultsareasfollows:therearetwopeaksintheq-TcurvesofthesampleswithAgdoping,oneiscausedbyresistancechangeduringtheparamagnetism-ferromagnetismtransition,andtheotherisfromboundary-dependentscatteringofconductionelectronsontheboundariesofgrains.ThepeakvalueofMRincreaseswithincreasingAgdopingcontent,anditincreasesfrom8.2%fory=0.2to29.6%fory=1.0underthemagneticfieldofB=0.8T;MRremainsaconstantof12%inthetemperaturerangeof218-168Kforthesamplewithy=1.0,andthetemperaturestabilityofMRisinfavorofthepracticalapplicationofMR.

简介：TheagingbehaviorofAl-Cu-Mg-AgalloyswithhighCu/Mgwasstudiedbytransmissionelectronmicroscopy(TEM)andsmall-angleX-rayscattering(SAXS)usingsynchrotronradiation.TEMstudyrevealsthatthemajorstrengtheningphasesofthealloyafteragingat160?Cfor10hareΩandlessθ′.SAXSstudyshowsthatthescatteringpatternsarecomposedofseveralconcentriccirclesatthebeginningofagingprocess,whichisreplacedbythebutterfly-wingsscatteringpatternswiththeincreaseofagingtime...

简介：采用SEM、TEM、EDS、DSC、XRD和拉伸实验研究铸态7X50合金及其均匀化处理过程的组织演变。结果表明,铸态7X50合金相组成主要有S(Al2CuMg)、T(Al2Mg3Zn3)、MgZn2和少量的Al7Cu2Fe和Al3Zr相。均匀化处理过程中枝晶网和残留相逐渐减少,经(470°C,24h)+(482°C,12h)均匀化处理时,T相消失,S相有微量残留,Al7Cu2Fe相几乎没有变化。铸态合金的DSC曲线中在477.8°C处有一较强吸热峰,经470°C、1h均匀化后合金的DSC曲线在487.5°C处出现一个新的吸热峰,而经482°C、24h均匀化处理后合金在487.5°C处的吸热峰基本消失。在XRD谱中未出现T(Al2Mg3Zn3)相,这和T相与S(Al2CuMg)及MgZn2相相关的结论相吻合。预均匀化处理制备的板材中再结晶晶粒分数明显降低,抗拉强度和断裂韧性相对常规均匀化处理制备的板材分别提高约15MPa和3.3MPa·m1/2。

简介：在陕西有色金属控股集团有限责任公司迎来成立10周年的重要时刻，陕西黄金集团黄金精炼提纯及产品深加工生产线一次性试车成功并顺利投产，为集团公司10周年庆典献上了一份厚礼。11月9日，陕西有色金属控股集团公司总经理汪汉臣在陕西黄金集团公司总经理徐振平，党委副书记陈德魁，副总经理高菊生、任革凡的陪同下，到陕西黄金集团西安秦金公司视察指导工作。

简介：针对齿轮故障特征提取和状态识别困难的问题，提出一种基于排列熵和连续隐马尔可夫模型（CHMM）的齿轮故障诊断方法。首先对提取的目标齿轮啮合信号作降噪处理，再采用排列熵算法进行分析，提取排列熵均值、方均根、最大值、最小值作为特征量输入到CHMM中训练和识别，通过对比最大对数似然概率值来确定齿轮的故障。最后在变速箱齿轮故障模拟试验台上，对正常、轻微磨损、严重磨损和断齿4种齿轮状态进行试验验证，结果表明该方法能有效地对齿轮故障进行诊断。

简介：河南济源金利冶炼有限公司积极采取措施，克服困难，率先在铅行业中淘汰了铅烧结机生产线。目前该公司采用国内先进的氧气底吹熔炼——液态渣直接还原炉炼铅工艺，进行技术改造，建设年产20万吨的铅冶炼项目。

简介：众所周知，电子玻纤布、覆铜板及印制线路板，是同一条产业链上三个紧密相连、唇齿相依的上下游产品，电子玻纤布是覆铜板及印制线路板必不可少的基础材料。我国电子玻纤布是在覆铜板及印制线，路板工业的强劲推动下才蓬勃发展起来的。电子玻纤布的生产关键技术是池窑，

简介：ThestructureandelectrochemicalpropertiesofanewlowcobalthydrogenstorageelectrodealloysLa1-xLixNi3.2Co0.3Al0.3(0≤x≤0.2)wereinvestigatedwithadifferentadditionsofLiinreplacementofLa.WiththeincreaseofLicontentsthemaximumdischargecapacityincreasesfrom240mAh·g-1(x=0)to328.4mAh·g-1(x=0.1)andthecyclestabilityisimprovedcorrespondingly.ThecapacitydecaycanremaiN28.6%(x=0.2)after230charge/dischargecycles.Thehighratedischarge(HRD)abilityofthealloys(x≤0.1)isimprovedandthebestHRDis34.1%(x=0.1)underthedischargecurrentdensity1200mA·g-1.ItisfoundthatthepreparedalloysarebasicallycomposedofLaNi5asmatrixphaseandLaNi3assecondphase(x≤0.1).ButtheabundanceofLaNi3phasedramaticallydecreaseswithincreasingx.Whenx=0.2,anewphaseAl(NiCo)3isformed.

简介：飞机部件之间存在着复杂的连接关系，连接件用于传递载荷和固定部件，一旦发生问题，影响重大。本研究针对在役飞机垂尾与机身对接结构处频发裂纹和紧固件松动故障，按照故障树初步分析影响因素，通过有限元及频响函数进一步计算诊断，并针对结构设计、刚度匹配、强制装配对流场中结构振动问题的影响进行了讨论。分析表明：蒙皮局部突起造成气流紊乱加之发动机振动为连接部位裂纹和紧固件松动的直接原因。针对分析结果，通过改进零件结构、加工方式以提高构件疲劳眭能，局部补强以减小后机身局部振动方面完善设计，目前已经过飞行验证，分析过程及改善措施合理有效。