粉末冶金技术2024，Vol.42Issue(6)：621-631,11.DOI:10.19591/j.cnki.cn11-1974/tf.2022110005
造孔剂对医用多孔Ti/16Mg复合材料组织性能的影响
Effects of pore-forming agents on microstructure and properties of biomedical porous Ti/16Mg composites
摘要
Abstract
The biomedical porous Ti/16Mg composite materials with the elastic modulus close to that of human bone and the strength meeting the requirements of human implants were prepared by powder metallurgy combined with microwave sintering method in this paper.The effects of particle size and addition amount(mass fraction)of NH4HCO3 pore-forming agents on the microstructure,mechanical properties,and corrosion resistance of the composites were investigated by scanning electron microscopy,X-ray diffraction,metallography,compression test,and corrosion resistance test.The results show that NH4HCO3 has no significant effect on the phase composition of porous Ti/16Mg composites.The pore size increases with the increase of NH4HCO3 particle size,and the porosity increases from 16.64%to 33.09%with the increase of NH4HCO3 mass fraction.When the particle size of NH4HCO3 is 165～198 μm and the mass fraction is 18%,the elastic modulus of the porous Ti/16Mg composites is 6.49 GPa and the compressive strength is 115 MPa,which can meet the mechanical property requirements of human implants.Particle size of NH4HCO3 has little effect on the corrosion resistance of the porous Ti/16Mg composites.With the same particle size,the corrosion resistance of the porous Ti/16Mg composites decreases slightly and the polarization resistance decreases from 574.528Ω·cm‒2 to 139.236Ω·cm‒2 with the mass fraction of NH4HCO3 increasing from 0 to 24%.关键词
造孔剂/多孔钛合金/微观组织/力学性能/耐腐蚀性Key words
pore-forming agents/porous titanium alloys/microstructure/mechanical properties/corrosion resistance分类
矿业与冶金引用本文复制引用
许莹,赵散玉,夏朋昭,何曜腾,武泽倩,蔡艳青..造孔剂对医用多孔Ti/16Mg复合材料组织性能的影响[J].粉末冶金技术,2024,42(6):621-631,11.基金项目
国家自然科学基金资助项目(51874140) （51874140）
河北省自然科学基金资助项目(C2018209207) （C2018209207）
大学生创新创业计划项目(X2021222,R2022099) （X2021222,R2022099）
