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The generation and transport process of bombardment ions and the sputtering process of ions on target are important parts to realize double glow plasma metallization. In this paper, on the basis of the glow discharge theory and COMSOL Multiphysics software, a typical double glow plasma metalizing device was modeled, and the energy range of bombardment ions was analyzed. Combined with the classical scattering theory and Monte Carlo method, SRIM software was used to simulate the sputtering process of Ar+ on multiple metal targets. The results show that the position of sputtering atom is concentrated near the incident position of metal target, forming a circular sputtering crater. The energy of sputtered atoms is within 20 eV. With the increase of incident ion energy, some sputtered atoms with high energy and large angle appear. The sputtering yield increases with the increase of the electron filling degree of the d shell layer of target atom, and the sputtering yield mainly comes from the low-energy recoil atoms. The larger sputtering yield means that the more low energy recoil atoms, the more dispersed energy transfer and the lower sputtering atom energy.

In this article, we mainly investigated the effects of different simvastatin concentrations on the biological behavior of senescent macrophages and the immune microenvironment mediated by them on osteogenic and angiogenic functions. The feasibility of loading simvastatin on titanium surfaces to mediate the function of senescent macrophages was also explored. The results show that when the concentration of the drug was 0.1 μmol/L, it promoted the proliferation of macrophages and polarized them to pro-healing M2 phenotype, which is beneficial for macrophages to create an immune microenvironment promoting osteogenesis and angiogenesis. The chitosan/gelatin coating constructed on titanium surface could load and release simvastatin, promoting the viability and proliferation of senescent macrophages.

Zn-xNb (x=0, 0.5, 1, 3, 5, 10%) composites were prepared by vacuum heating-press sintering process with Zn and Nb powders as raw materials. The surface morphology and phases of the composites were characterized. The effects of Nb addition on the mechanical properties, corrosion degradation behavior, and cytocompatibility of the composites were investigated. The results show that the Nb particles are distributed in the Zn matrix in a lamellar shape. With the increase of Nb content, the compressive yield strength of the composite increases first and then decreases, and Zn-0.5Nb shows the best performance. The increase of Nb content accelerates the degradation of the composites. Compared with pure Zn, the samples with high Nb content show better cytocompatibility, probably owing to the addition of Nb reducing the release of Zn2+.