Magnesium(Mg)and its alloys have recently gained increasing attention in the biomedical field as promising biodegradable materials with harmless degradation products.Magnesium-based alloys have a wide range of biomedi...Magnesium(Mg)and its alloys have recently gained increasing attention in the biomedical field as promising biodegradable materials with harmless degradation products.Magnesium-based alloys have a wide range of biomedical applications because of their outstanding biocompatibility and unique mechanical properties.Widespread use of Mg-based biomedical devices eliminates the need for post-healing biomaterial removal surgery and minimizes the negative consequences of the implantation of permanent biomaterials,including stress shielding and undesired metal ion release in the body.This paper provides a literature review on the properties and manufacturing methods of Mgbased alloys for biomedical applications,including orthopedic implants,cardiovascular applications,surgical wires and staplers,and antitumor activities.Each application of Mg-based biomaterials is investigated from a biological perspective,including matching functional properties,biocompatibility,host tissue responses,and anti-microbial strategies,along with potential additive manufacturing technologies for these applications.Finally,an outlook is presented to provide recommendations for Mg-based biomaterials in the future.展开更多
Recent advancements have shown the effectiveness of strengthening 316L with TiC particles addition through the laser powder bed fusion(LPBF)process.However,the question remains whether TiC undergoes decomposition into...Recent advancements have shown the effectiveness of strengthening 316L with TiC particles addition through the laser powder bed fusion(LPBF)process.However,the question remains whether TiC undergoes decomposition into Ti and C atoms,primarily because of the challenges associated with measuring C at low concentrations.In this study,we employed atom probe tomography(APT)to provide evidence of decomposition by observing the presence of Ti and C atoms in the 316L matrix.The fast cooling rate of the LPBF process results in the supersaturation of Ti and C in the 316L matrix.Adding 3 wt%TiC particles increased the yield strength of LPBF-processed 316L from 599 MPa to 832 MPa.The subsequent annealing treatment resulted in the formation of more TiC nanoparticles as a result of precipitation from the supersaturated Ti and C in the 316L matrix.Consequently,the yield strength was further enhanced to 959 MPa after annealing at 700℃for 1 h.This study marks the first direct demonstration of the decomposition of TiC in metal matrix composites.展开更多
基金supported by National Research Foundation of Korea(NRF)grants funded by the Korean Government(MSIT)[grant numbers RS-2023-00207763 and NRF-2022R1A2C2010350].
文摘Magnesium(Mg)and its alloys have recently gained increasing attention in the biomedical field as promising biodegradable materials with harmless degradation products.Magnesium-based alloys have a wide range of biomedical applications because of their outstanding biocompatibility and unique mechanical properties.Widespread use of Mg-based biomedical devices eliminates the need for post-healing biomaterial removal surgery and minimizes the negative consequences of the implantation of permanent biomaterials,including stress shielding and undesired metal ion release in the body.This paper provides a literature review on the properties and manufacturing methods of Mgbased alloys for biomedical applications,including orthopedic implants,cardiovascular applications,surgical wires and staplers,and antitumor activities.Each application of Mg-based biomaterials is investigated from a biological perspective,including matching functional properties,biocompatibility,host tissue responses,and anti-microbial strategies,along with potential additive manufacturing technologies for these applications.Finally,an outlook is presented to provide recommendations for Mg-based biomaterials in the future.
文摘Recent advancements have shown the effectiveness of strengthening 316L with TiC particles addition through the laser powder bed fusion(LPBF)process.However,the question remains whether TiC undergoes decomposition into Ti and C atoms,primarily because of the challenges associated with measuring C at low concentrations.In this study,we employed atom probe tomography(APT)to provide evidence of decomposition by observing the presence of Ti and C atoms in the 316L matrix.The fast cooling rate of the LPBF process results in the supersaturation of Ti and C in the 316L matrix.Adding 3 wt%TiC particles increased the yield strength of LPBF-processed 316L from 599 MPa to 832 MPa.The subsequent annealing treatment resulted in the formation of more TiC nanoparticles as a result of precipitation from the supersaturated Ti and C in the 316L matrix.Consequently,the yield strength was further enhanced to 959 MPa after annealing at 700℃for 1 h.This study marks the first direct demonstration of the decomposition of TiC in metal matrix composites.
