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Magnesium alloys are potential to be developed as a new type of biodegradable implant material by use of their active corrosion behavior.
      
In vivo study of degradable magnesium and magnesium alloy as bone implant
      
Undecalcified cross-sections of implant were performed to observe bone-implant by scanning electron microscopy (SEM) and energy dispersive spectromicroscopy (EDS).
      
The results indicate that magnesium is biocompatible, osteo-conductive and is a potential material for use as a degradable bone implant.
      
Simulation of implant distribution with the inverse Fokker-Planck equation
      
A new mathematical model for the calculation of the implant distribution function in a solid is suggested.
      
Obtained results are compared with the Monte-Carlo simulation of the implant concentration distribution for the case of high-energy boron implantation into silicon.
      
A model of forming periodic structures induced on a solid surface by a uniform ion flow (at high implant concentrations) is put forward.
      
The implant localization under the high-temperature (T = 1000°C) annealing of silicon layers irradiated to heavy doses is explained within a fractal model of cluster-cluster aggregation.
      
B or P ion implantation into films predoped with Ge is shown to give a positive TCR if the implant concentration exceeds 1018 atoms/cm3.
      
It was found that the implant profiles observed upon the electron-beam annealing extend to deeper layers as compared to the calculated curves or the profiles upon thermal annealing (800°C, 30 min).
      
A correlation between the work function and the amount of cesium implant is studied.
      
The effect of high implant doses and high ion current densities on polyimide film properties
      
The implant doses and the ion current densities are varied in a wide range between 2.5×1014 and 1.5×1017 cm-2 and between 1 and 16 μA/cm2, respectively.
      
It is shown that the radiation-stimulated thermolysis of polyimide and its chemical constitution are responsible for a monotonic growth of the electrical conductivity of the layer with increasing ion current at a given implant dose.
      
When the ion current density is fixed, the conductivity grows stepwise with implant dose, whereas the concentration of paramagnetic centers and the optical transmission of the modified layer decrease.
      
Erratum: "The effect of high implant doses and high ion current densities on polyimide film properties" [Technical physics 47 (4
      
After hydroxyapatite has been resorbed, these phases come in contact with tissue and near-tissue fluids and influence the result of the implant.
      
The implant depth-concentration profiles were modeled with an allowance for a thermostimulated increase in the diffusion mobility of the implanted impurity in the sample volume.
      
It is shown that an increase in the substrate temperature by several tens of degrees leads to a diffusion smearing of the implanted impurity profile and, hence, to a decrease in the local implant concentration hindering the metal silver nucleation.
      
 

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