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EXPLORATION FOR APPLICATION OF EET IN METALLIC BIOMATERIALS RESEARCH

Y.P.Lu1 , 2) R.F.Zhu1) , T.Q.Lei2) , Q.S.Ma3)and M.S.Li1) 1) College of Materials Science and Engineering , Shandong University of Technology , Jinan 250061 , China2) Harbin Institute of Technology , Harbin 150001 , China 3) Qingrui Oralimplant Center , Shandong Provincial Hospital , Jinan 250021 , China

金属学报(英文版)

Theelectron densitiesonsomeplaneofinvolved cellsin αTitanium and Ti Al , Ti 6 Al 4 V and Au Pd Ptalloys werecalculated through EET. Theresultsshow thatthereexist planes withsimilarelectron density amongα Ti,Ti Al,Ti Vand Au Pd Pt unitcells, which veri fiedtosomeextentthe validity ofthe application of EETand atomic boundary condition inTFDtheoryin biomaterials.

关键词: biomaterial , null , null

MICROSTRUCTURE AND FORMATION MECHANISM OF LASER CLAD Ni60ACOATING

C.Z. Chen1 , 2) , T.Q. Lei2) , D.W. Cui1)and J.H. Yu1) 1) College of MaterialScience and Technology , Shandong University of Technology , Jinan 250061 , China2) College of MaterialScience and Technology , Harbin Institute of Technology , Harbin 150001 , China

金属学报(英文版)

The microstructure and formation mechanism of laser clad Ni60 Acoating were studied by meansof XRD, SEM, TEMand EDAXetc. Theresultsshow thatthe microstructureofthe coatingiscontrolled bytheratiooftemperature gradient Gand solidification speed υ( G/υ)atthesolid liquidinterface. Attheinterfaceof molten pool/substrate, G/υisquitelarge,and Ni basedsolid solutionsgrowingintheform oflow speed planar grain boundary form abonding belt. With the advancement of the solid liquid interface, G/υdecreases, and a bonding zone mainly composed ofcomplex cellulareutecticsof Ni+ M23( CB)6 and Ni+ Ni3Bisformed when G/υisstilllargeenough. Further decrease willlead to a clad layerthat exhibitscellular and dendritic Ni basedsolidsolutions,dendriticor discontinuousnetwork M7( CB)3 and complex eutectics( Ni+ M23( CB)6 and Ni+ Ni3 B) between them .

关键词: microstructure , null , null , null

MEASUREMENT OF THE THERMAL PARAMETER OF THEBULK AMORPHOUS Zr_(41)Ti_(14)Ni_(10)Cu_(125)Be_(225)ALLOY

X L Tian1) , Y M Sun1) , S X Zhao1)and X C Chen2) 1) College of Materials Science and Engineering , Shandong University of Technology , Jinan 250061 , China2) Institute of Physics , The Chinese Academy of Sciences , Beijing 100081 , China

金属学报(英文版)

Thethermal parameterofthe bulk amorphous Zr41 Ti14 Ni10 Cu12 5 Be22 5 alloy thermal dif fusivity,thermalcapacity andcoefficientofthermalconductivityatthestateofsolid andsu percooled liquid hasbeen measuredinthisstudy.It wasfoundthatthecoefficientofthermalconductivity and thethermalcapacity vary significantly with temperature. An error occursinthe measurementofthecoefficientofthethermalconductivity andthethermalcapacity us ing the method adoptedin this paper bothintheglasstransition processand when crystalliza tion processappears.

关键词: Zr41Ti14Ni10Cu12 5Be22 5 , null , null

EXPERIMENTAL RESEARCH ON CrAl MIXED POWDERS BY MECHANICAL ALLOYING

B.S. Qi , C.G. Wang , X. Yaw and Q.F. Peng Schoolof Materials Science and Engineering , Shandong University of Technology , Jinan 250061 , China

金属学报(英文版)

Thechangesof microstructure, phase? structureand microhardnessof Cr Al mixed powders in the processof mechanical? alloying ( MA) have? beeninvestigated by X ray diffractionanalysis , SEM examination and microstructure testing. The results show that the mi crostructure of Cr Al mixed powderssubjected? to mechanicalalloying for96 hoursexhibits super saturated solid solution of Cr andintermetalliccompound η AlCr2 .

关键词: mechanicalalloying( MA) , null , null

REFINING EFFECT OF BORON ON THE EUTECTIC SILICON IN HYPOEUTECTIC AlSi ALLOYS

L .Wang , X. F. Bian and S.J. Yuan MaterialScience and Engineering , Shandong University of Technology , Jinan 250061 , China

金属学报(英文版)

The effect of boron on the eutecticsilicon in hypoeutectic Al Si alloys has been studied withXRDand SEM. Thefindingindicatesthatboron hasastrong refining effecton eutecticsili con . AlB2 formed by boron additionto Al Si meltsactasthe nucleusofeutecticsilicon which leadstotherefinementofeutecticsilicon.

关键词: hypoeutectic Al Sialloys , null , null

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