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简介：Variousfunctionalgroupshavebeensuggestedtoplayessentialrolesonbiomineralizationofcalciumcarbonate（CaCO3）innaturalsystem.2Dand3DmodelsofregularlyarrangedfunctionalgroupshavebeenestablishedtoinvestigatetheireffectonCaCO3crystallization,Thismini-reviewsummarizestherecentprogressandthefuturedevelopmentisprospected.

简介：Theelectronicstructureandbondingnatureofaseriesofcollectorsinthecalciumandmagnesiumcontainingmineralssystemarestudiedusingquan-tumchemistryCNDO/2method.Thedifferenceincol-lectingpropertiesisdiscussedbymeansofcharac-teristicparametersderivedfromthequantumchem-istrycalculations,andthedevelopingdirectionoffattyacidcollectorsispredicted.

简介：把镁合金用作合适的钥匙可被细菌破坏植入是怎么调整他们的降级率。我们报导策略准备biocompatible有由在silicate-K的microarc氧化(毛)的AZ91D合金上的改进biocorrosion抵抗性质的陶器的涂层2ZrF有或没有Ca的6答案(H2PO4)2添加剂。涂层的微观结构和biocorrosion被XRD和SEM描绘，以及电气化学并且模仿的身体液体(SBF)的沉浸测试。涂层主要是的结果表演MgO创作了，Mg2SiO4,m-ZrO2个阶段，进一步的Ca包含混合物由Ca包含涂层(H2PO4)在silicate-K的2增加2ZrF6答案。涂的AZ91D合金的腐蚀抵抗显著地与赤裸的相比被改进。在为28d在SBF沉浸以后，Si-Zr5-Ca0涂层显示最好的腐蚀抵抗表演。

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简介：AZ31Mg合金的微观结构进化在变化隧道期间，尖挤出(CCAE)被调查。AZ31Mg合金的谷物在在523K使变形的CCAE以后从500m显著地被精制到15m。脱臼在挤出的起始的阶段被导致，他们自己重排在变丑期间形成脱臼边界和亚谷物边界。当通过有紧张的水平变化隧道的标本增加了时，亚边界演变到高角度谷物边界(HAGB)。谷物精炼的过程能被描述为连续动态恢复和再结晶(CDRR)。

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简介：Equalchannelangularpressing(ECAP)processingandannealingwereappliedtotheAZ31magnesiumalloysheetstoevaluatethepotentialimprovementinthemechanicalpropertiesandformability.TheECAPexperimentwasconductedat300℃inadiehavinganincludedangleof90obetweentwochannelsbytheBCZroutewiththesheetsrotatedby90°aboutthenormalaxisofplateplane.Thetensiletestsandconicalcuptestswereconductedatvarioustemperaturesfrom20to250℃.Theexperimentalresultsindicatedthatimprovingtheworkingtemperaturescouldleadtothesoftinthematerialandtheenhancementofductility.Comparatively,theECAPedAZ31alloysheetsshowedtheloweryieldstrengthandsmallerconicalcupvalue(CCV)thantheunECAPedcounterpartintheroomtemperature.Thedifferenceinyieldstrengthbetweenthembecamesmallintheelevatedtemperature,buttheECAPedsamplesstillhadthesmallerCCVvalue,implyingtheimprovedformability.ThetextureoftheAZ31alloysheetscouldbemodifiedbyECAPandthedecreaseintheyieldstrengthandmoreuniformdeformationrealizedinthematerial,sotheformabilityofAZ31alloysheetswasimproved.

简介：Anas-castmagnesiumalloywithhighAlcontentMg15Alwassubjectedtoequal-channelangularpressing(ECAP)throughadiewithanangleofφ=90?at553KfollowingrouteBc.Itisfoundthatthenetworkβ-Mg17Al12phasesintheas-castMg15Alalloyarebrokenintosmallblocksanddisperseduniformlywithincreasingnumbersofpressingpasses.Moreover,manynano-sizedMg17Al12particlesprecipitateintheultra-fineα-Mgmatrix.Thegrainsareobviouslyrefined.However,thegrainstructureisinhomogeneousindifferentareasofthealloy.Theaveragesizeoftheprimaryphaseα-Mgisreducedtoabout1μmwhilegrainsofaround0.1-0.2μmareobtainedinsometwo-phaseareas.WithadditionalECAPpasses(upto8),coarseningofthegrainsoccursbydynamicrecovery.RoomtemperaturetensiletestsshowthatthemechanicalpropertiesofMg15Alalloysaremarkedlyimprovedafter4ECAPpasses.Theultimatetensilestrengthandelongationtofailureincreasefrom150MPato269.3MPaandfrom0.05%to7.4%,respectively.Comparedwiththatafter4passes,theelongationtofailureofthealloyincreasesbutthestrengthofthealloyslightlydecreasesafter8ECAPpasses.FracturemorphologyoftheECAP-processedalloyexhibitsdimple-likefracturecharacteristicswhiletheas-castalloyshowsquasi-cleavagefractures.