Hydrothermal calcification surface modification of biomedical tantalum

作     者：Di-Feng Luo Pan Ning Fan Zhang Yan Zhou Hong-Mei Zhang Tao Fu Di-Feng Luo;Pan Ning;Fan Zhang;Yan Zhou;Hong-Mei Zhang;Tao Fu

作者机构：Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi’an Jiaotong UniversityXi'an 710049China Bioinspired Engineering and Biomechanics CenterXi’an Jiaotong UniversityXi’an 710049China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第4期

页      面：928-933页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 080503[工学-材料加工工程] 08[工学] 0806[工学-冶金工程] 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：financially supported by the Industry-University-Research Collaboration Program of Ronggui District,Shunde City(No.201701) the High Efficiency Medical Devices Engineering and Technology Research Center of Guangdong Province(No.2018110100310005409)。 

主　　题：Tantalum Hydrothermal Calcification Corrosion Bioactivity 

摘      要：Tantalum(Ta) as a new type of medical metal is now utilized in several orthopedic applications due to its excellent fracture toughness and workability,high corrosion resistance,good biocompatibility and X-ray visibility,but it lacks bioactivity.Therefore,pure Ta was hydrothermally calcified in CaHPO4 solution at 120-200℃ here for bioactive surface modification.Scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX),X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD) and Raman spectroscopy analyses show that thin tantalum oxide film with a few calcium phosphate precipitates is formed at the surface after the treatment at 200℃.The hydrothermally treated sample has good hydrophilicity and corrosion resistance evidenced by the water contact angle measurement and the potentiodynamic polarization test,respectively,and it can induce the formation of apatite layer after soaked in the simulated body fluid for 1 week.The present method would be applicable for bioactive surface modification of tantalum implants with irregular shapes and even porous structure.