通過仿生法在純鎂表面制備磷灰石涂層的研究.pdf

1、武漢理工大學碩士學位論文通過仿生法在純鎂表面制備磷灰石涂層的研究姓名：龔沛申請學位級別：碩士專業(yè)：材料學指導教師：王欣宇20080501武漢理工大學碩十學位論文AbstractBiomedicalmetallicmaterialspossessfinemechanicspropertieswhichareusedtorestoreandreplacethehardtissueofhumanbodiesButthebadresistanc

2、etoerosionandbiocompatibilitymakethemetallicmaterialsawayfromtheidealsubstitutedmaterialThemoduleofelasticityofMgisclosetotheboneofhuman，andtheMgionisneededtothebodyButthethelowresistancetoerosionmakestheMgsubstratedestr

3、oyedbadlyHAisthemaincomponentofboneandteethofhumanbodywhichcanformastrongbondwiththeneighboringboneafterimplantedinthehumanbodybutthebrittlenessoftheceramiclimitsitsuseAttemptstoprepareabonelikeapatitcmetalcompositehaveb

4、eenmadeusingabiomimeticprocessinwhichthemetalsurfaceismodifiedwithfunctionalgroupseffectiveininducingapatitenucleation一OH，一SiOH，andcarboxylorcarboxylategroupshavebeenusedasthefunctionalgroupsInthepresentstudyweactivating

5、themagnesiummatrixwithacidanddilutealkalisolutionandEDTAfirstly，cdWasinducedontothesurfaceofmagnesiumbyimmersingitintotheCaCl2solution；andthenthespecimenWasdippedinphosphateionsolutiontodepositapatitenucleiontoitssurface

6、ThenthespecimenswereimmersedinSBFandmetastablecalciumphosphatesolution(CPsolution)respectivelytoformalayeronitssurfaceThecoatingformedonthemagnesiumischaracterizedbyXraydiffraction(XRD)andscanningelectronmicroscopy(SEM)T