简介:X-raydiffraction(XRD)anddifferentialscanningcalorimetry(DSC)wereemployedtoinvestigatetheinfluenceofNicontentonthecrystallizationofamorphousZr70Cu30-xNix(atomfrationin%)alloys,ExperimentalresultsshowthatwiththeNicontentincreasingtheactivationenergiesforcrystallizationofamorphousZr70Cu30-xNixalloysincreasecorrespondingly,indicatingthatthethermalstabilityisgreatlyimproved.AlltheDSCtracesofamorphousZr70Cu30-xNixalloysexhibittwoexothermicpeaks,suggestingthatthecrystallizationprocessviaadouble-stageticles,whilethesecondonecorrespondstotheprecipitaionofnano-scaleZr2Niphaseandcrystallizationofresidualamporphousphase,ThemechanismonthecrystallizationofamorphousZr70Cu30-xNixalloyswasdiscussed.
简介:采用化学抛光处理钛、阳极氧化和微弧氧化处理钛作为生物材料模型,研究成骨细胞MG-63在其表面的黏附和增殖机理。结果表明,阳极氧化和微弧氧化处理的钛表面通过促进MG-63细胞分泌纤维连接蛋白形成细胞外基质从而使其快速附着和伸展。另外,阳极氧化和微弧氧化处理的钛表面通过Outside-in信号传导通路,上调纤维连接蛋白及与其相关的整合素α5的转录水平,促进成骨细胞MG-63在其表面的增殖。