首页|Influence of high temperature oxidation on mechanical properties and in vitro biocompatibility of WE43 magnesium alloy fabricated by laser powder bed fusion

Influence of high temperature oxidation on mechanical properties and in vitro biocompatibility of WE43 magnesium alloy fabricated by laser powder bed fusion

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Laser powder bed fusion(L-PBF)has been used to fabricate biodegradable Mg implants of WE43 alloy,but the degradation is too fast compared with the term bone reconstruction.Previous studies show that high temperature oxidation(HTO)can successfully inhibit the degradation of WE43 alloy.In this work,the influence of HTO on L-PBF samples of WE43 alloy was investigated regarding tensile,compressive,and abrasive resistance,as well as in vitro cytotoxicity,cell proliferation,hemolysis,and osteogenesis.Compared with the as-built L-PBF samples,HTO increased grain size and grain texture,stabilized and coarsened precipitates,and caused discontinuous static recrystallization in the matrix.The oxide layer at the surface of the HTO samples improved surface roughness,hydrophilia,hardness,and abrasive resis-tance.The tensile strength decreased slightly from 292 to 265 MPa,while the elongation substantially increased from 10.97％to 16.58％after HTO.The in vitro cell viability,cell proliferation,hemolysis,and osteogenic effect were considerably enhanced due to the improvement of surface quality and the initial inhibition of excessive Mg2+releasement.Overall,HTO is of great benefit to the surface performance,ductility,and biocompatibility of WE43 alloy fabricated by L-PBF for biodegradable applications.

Additive manufacturingBiodegradable metalMagnesium alloyWE43High temperature oxidation

Jinge Liu、Shuyuan Min、Zijun Mao、Mengran Zhou、Bingchuan Liu、Dazhi Liu、Fei Song、Peng Wen、Yun Tian、Yufeng Zheng

展开 >

The State Key Laboratory of Tribology in Advanced Equipment,Tsinghua University,Beijing 100084,China

Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China

Department of Orthopaedics,Peking University Third Hospital,Beijing 100191,China

Engineering Research Center of Bone and Joint Precision Medicine,Ministry of Education,Beijing 100191,China

Tangshan Weihao Magnesium Powder Co.,Ltd.,Qian'an 064406,China

Institute for Precision Medicine Tsinghua University,Beijing Tsinghua Changgung Hospital,Beijing 102218,China

School of Materials Science and Engineering,Peking University,Beijing 100871,China

展开 >

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaTsinghua Precision Medicine Foundation and Tsinghua-Toyota Joint Research Fund

2018YFE0104200521752748217206551875310

2024

10.1016/j.jmst.2023.08.056

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.179(12)
  • 72