Apatite ceramics Ca10(PO4)6 X2(X=F,OH)were prepared by the standard solid state sintering method and irradiated with He ions under a fluence of 5×10^16 ions/cm^2 at 450℃.Irradiation induced formation and growth ...Apatite ceramics Ca10(PO4)6 X2(X=F,OH)were prepared by the standard solid state sintering method and irradiated with He ions under a fluence of 5×10^16 ions/cm^2 at 450℃.Irradiation induced formation and growth of the He bubbles were observed by a transmission electron microscope.Hydroxyapatite Ca10(PO4)6(OH)2 and fluoroapatite Ca10(PO4)6 F2 with different He bubble morphologies indicate the influence of OH^-/F^-substitution on the He-ion annealing efficiency,as well as the structure itself,which affects the process of He bubble evolution and formation.The grain boundaries also act as sinks to accumulate He bubbles.No obvious irradiation damage but slight intensity reduction and left shift of diffraction peaks were observed according to the grazing incidence x-ray diffraction and Raman spectra characterizations,indicating that defects of interstitials and vacancies were generated.展开更多
基金Natural Science Foundation of Fujian Province,China(Grant No.2017J01007)partially by the Energy Development Foundation of Energy College(Grant No.2018NYFZ01)。
文摘Apatite ceramics Ca10(PO4)6 X2(X=F,OH)were prepared by the standard solid state sintering method and irradiated with He ions under a fluence of 5×10^16 ions/cm^2 at 450℃.Irradiation induced formation and growth of the He bubbles were observed by a transmission electron microscope.Hydroxyapatite Ca10(PO4)6(OH)2 and fluoroapatite Ca10(PO4)6 F2 with different He bubble morphologies indicate the influence of OH^-/F^-substitution on the He-ion annealing efficiency,as well as the structure itself,which affects the process of He bubble evolution and formation.The grain boundaries also act as sinks to accumulate He bubbles.No obvious irradiation damage but slight intensity reduction and left shift of diffraction peaks were observed according to the grazing incidence x-ray diffraction and Raman spectra characterizations,indicating that defects of interstitials and vacancies were generated.
