简介：ThehotdeformationbehaviorofextrudedAZ80magnesiumalloywasinvestigatedusingcompressiontestsinthetemperaturerangeof250-400℃andstrainraterangeof0.001-1.000s^-1.The3Dpowerdissipationmapwasdevelopedtoevaluatethehotdeformationmechanismsanddeterminetheoptimalprocessingparameters.Twodomainsofdynamicrecrystallizationwereidentifiedfromthe3Dpowerdissipationmap,

简介：ThedosimetricphosphorsLi_3PO_4:M(M=Tb,Cu)wereproducedbymodifiedsolid-statemethod.ThestructuralandmorphologicalcharacterizationwascarriedoutthroughX-raydiffraction(XRD)andscanningelectronmicroscope(SEM).Additionally,thephotoluminescence(PL),thermoluminescence(TL)andopticallystimulatedluminescence(OSL)propertiesofpowderLi_3PO_4dopedwithTbandCuwerestudied.ItisadvocatedthatLi_3PO_4:CuphosphornotonlyshowshigherOSLsensitivity(25timesormore)butalsogivesfasterdecayinOSLsignalsthanthatofLi_3PO_4:Tb~(3+)phosphor.Theminimumdetectabledose(MDD)ofLi_3PO_4:M(M=Tb,Cu)phosphorsisfoundtobe21.69×10~(-3)and3.33×10~(-6)J·kg~(-1),respectively.InOSLmode,phosphorshowslineardoseresponseintherangeof0.02-20.00J·kg~(-1).InTLmode,sensitivityofLi_3PO_4:CuphosphorismorethanthatofLi_3PO_4:Tbphosphor.Thekineticsparameterssuchasactivationenergyandfrequencyfactorsweredeterminedbypeakshapemethod,andphotoionizationcrosssectionsofpreparedphosphorwerecalculated.

简介：9月25日，察右前旗人民政府与内蒙古福赛金属新材料有限公司签约，该公司拟投资3亿元建设年产10万吨再生锌项目，项目建设地点位于天皮山冶金化工工业园区占地150亩。

简介：据香港统计局4月25日公布的数据显示，由于买家利用金价3月下跌的机会买入黄金，中国大陆当月从香港进口的黄金规模达到2015年12月来的最高水平。

简介：GrainboundarydiffusiontechniquewithTbH_3nanoparticleswasappliedtofabricateTb-lesssinteredNdFe-Bpermanentmagnetswithhighcoercivity.Themagneticpropertiesandmicrostructureofmagnetsweresystematicallystudied.Thecoercivityandremanenceofgrainboundarydiffusionmagnetareimprovedby112%andreducedby26%comparedwiththoseoftheoriginalmagnet,respectively.Meanwhile,boththeremanencetemperaturecoefficient(α)andthecoercivitytemperaturecoefficient(β)ofthemagnetsareimprovedafterdiffusiontreatment.MicrostructureshowsthatTbelementenrichesinthesurfaceregionofNd_2Fe_(14)Bgrainsandisexpectedtoexistas(Nd,Tb)_2Fe_(14)Bphase.Thus,themagneto-crystallineanisotropyfieldofthemagnetimprovesremarkably.Asaresult,thesinteredNd-FeBmagnetsbygrainboundarydiffusionwithTbH_3nanoparticlesexhibitenhancedcoercivity.

简介：TheeffectofAl-3Ti-0.2C-5Sr(wt%)grainrefinerontherefiningperformanceandmodificationofA356alloywasinvestigatedusingopticalmicroscope(OM).ThemorphologyandcrystalstructureofternaryAl-Ti-SrphasesinAl-3Ti-0.2C-5Srrefinerwereanalyzedbyscanningelectronmicroscopy(SEM)andtransmissionelectronmicroscopy(TEM).TheresultsshowthattheternaryAl-TiSrphasesinAl-3Ti-0.2C-5SrrefinercanpromotethegrainrefiningefficiencyofA356alloy.TheternaryAl-Ti-Srphasesco-existintwomorphologies,i.e.,blocky-likephaseandsurround-likephase,besides,whichbothhavethesamechemicalcompositionofAl_(34)Ti_3Sr.ThecrystalstructureofAl_(34)Ti_3Srisface-centeredcubic,andthelatticeparameterisdeterminedtobeabout1.52nm.

简介：为确定热加工性能的最佳条件，在温度350~500°C、应变率0.0005~0.5s-1下研究Al6061/Al2O3纳米复合材料的热压缩行为。采用双曲正弦函数得到材料热压缩测试活化能为285kJ/mol。用动态材料模型和相应的加工图，确定了温度450°C、应变速率0.0005s-1和温度500°C、应变速率0.0005~0.5s-1为Al6061/Al2O3材料的热加工性能安全区，最大功率损耗率为38%。由于材料大变形，在温度400°C和应变速率0.5s-1下得到了被伸长和扭结晶粒。