简介:AdditivelymanufacturedTi-6Al-4Vlatticestructureshavefoundimportantnicheapplications.However,theyoftenshowinsufficientcompressiveductilityorinsufficientstructuralintegrity.Inthisstudy,abatchof45octahedralTi-6Al-4Vlatticestructureswasmanufacturedinthreedifferentstrutdiameters(0.5,1.0,1.5mm)byselectiveelectronbeammelting(SEBM).Theinfluenceofpost-SEBMannealingonthecompressivedeformationcharacteristicsofthelatticestructurewasinvestigated.Theas-builtTi-6AI-4Vlatticesfragmentedwhenthecompressivestrainreached13%-23%dependingonstrutdiameter.Annealingat950℃(Ptransustemperature:995℃)onlyslightlyimprovedthecompressiveductilityofthelatticestructures.However,annealingat1050℃(p-annealing)fundamentallychangedthecompressivedeformationmodeofthelatticestructures.Theresultantcompressivestress-straincurvewasfeaturedbyalongsmoothplateauandnofactureoccurredevenaftersignificantdensificationofthelatticestructurehadtakenplace(>50%ofcompressivestrain).
简介:以稻壳为模板和硅源制备Co-TiO2-SiO2介孔材料,研究了太阳光下对罗丹明B和龙胆紫染料的光催化活性,探讨了相同条件下Si02、Co-SiO2、TiO2-SiO2的催化活性。结果表明,Co-TiO2-SiO2在太阳光下对罗丹明B和龙胆紫的催化活性明显高于SiO2、Co-SiO2、TiO2-SiO2,降解率分别为70%和58%。更重要的是Co-TiO2-SiO2对蒽醌结构的染料罗丹明B的降解活性远远高于对苯环结构染料的龙胆紫的催化活性。
简介:六角形的硼氮化物陶器(h-BN)基于B的nitridation,粉末被反应sintering获得方法。结果的产品的机械性质和微观结构上的sintering温度的效果被调查,反应机制被讨论。结果证明在B和N2之间的反应在从1000瀠潨潴畬業敮'諟Iⅹe数瑣潲捳灯?的温度有力地发生了堠爭祡瀠潨潴汥'虪箿e数瑣潲捳灯?堨卐?愠摮氠晩瑥浩?敭獡牵浥湥獴