Low-cost surface modification of a biomedical Zr-2.5Nb alloy fabricated by electron beam melting
作者机构：School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Shi-changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Laboratory of Data Analytics and Optimization for Smart Industry(Ministry of Education)Northeastern UniversityShenyang 110819China Tianjin Key Laboratory of Bone Implants Interface Functionalization and PersonalizationTianjin 300190China Institute for Materials ResearchTohoku UniversitySendaiMiyagi 9808577Japan Division of Materials and Manufacturing ScienceGraduate School of EngineeringOsaka UniversityOsaka 565-0871Japan Department of Materials Science and EngineeringGraduate School of Science and TechnologyMeijo UniversityNagoya 468-8502Japan Faculty of ChemistryMaterials and BioengineeringKansai UniversityOsaka 564-860Japan
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第143卷第12期
页 面：178-188页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China (Nos.52071068 and 51871220) the Major Special Projects of the Plan“Science and Technology In-novation 2025”of China (No.2020Z060) the Fundamental Re-search Funds for the Central Universities (No.N2102013) Shenyang Talents program (RC200230),and the“111 Project”,China (No.B16009)
主 题：Zr-2.5Nb alloy Electron beam melting Thermal oxidation Oxidation behaviors and kinetics Grain size
摘 要：The Zr-2.5Nb alloy with a fine microstructure consisting ofαlaths was successfully prepared by electron beam melting(EBM).The thermal oxidation behaviors and kinetics of the as-built,and the EBM-built and hot isostatically pressed(HIPed)Zr-2.5Nb materials in a temperature range of 450-600°C were in-vestigated and compared with those of the alloy prepared by conventional casting and *** was found that the oxidation kinetics of the as-built and the forged materials followed the parabolic rate law during isothermal oxidation at 550°C,but the HIPed materials exhibited a parabolic-to-linear kinetic transition,suggesting that the larger grain sizes enhanced the *** oxide layers of all materials were composed of a large fraction of monoclinic zirconia phase(m-ZrO_(2))and a small fraction of tetrago-nal zirconia phase(t-ZrO_(2)),and transformed from t-ZrO_(2)to m-ZrO_(2)with increasing oxidation *** surface hardness of the as-built,the forged and the HIPed materials increased from 215,204,and 188 HV before oxidation to 902,1070,and 1137 HV after oxidation,*** cross-sections of the materi-als showed the presence of micropores and microcracks inside the oxide layers with thicknesses ranging from 4 to 8μ*** the oxidation temperature of 600°C and oxidation time duration of 3 h,a dense black m-ZrO_(2)oxide layer with smooth surface and 902 HV hardness was obtained on the EBM as-built Zr-2.5Nb materials.
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