Surface modification of dental alloy by electron-beam system.

1.对铸钛表面性能的影响在我们的表面粗糙度和光泽度测量中，纯钛和Ti-6Al-7Nb经电子束辐照后，表面粗糙度显著降低。本文研究了电子束辐照对纯钛和Ti-6Al-7Nb合金的耐蚀性能、表面晶体结构和硬度的影响。用恒电位仪(标准伏安仪HSV-100Hokuto Denko)以0.5 mV/S的速度从-500 mV扫描到2V，在0.9%的NaC l溶液中进行了阳极极化测量，测定并比较了+1000 mV时的钝化电流密度(I&lt；Pass&gt；)和Sce。在纯钛和Ti-6Al-7Nb合金中，电子束辐照后的通过值小于手工抛光后的通过值。分析了电子束辐照前后的X射线衍射谱。辐照后，Ti-6Al-7Nb合金的α峰半峰宽显著增加。另一方面，电子束辐照后纯钛的表面硬度降低。2.对Au-Ag-Pd合金表面性能的影响。采用铸造法制备了Au-Ag-Pd合金试件。用氧化铝喷砂后，用EB对这些试件进行辐照。陨石坑是在地表形成的。我们把氧化铝砂换成了玻璃珠子。因此，表面是光滑的。此外，对电子束辐照前后的X射线衍射谱进行了分析。EB照射后，出现宽峰。(2θ=52°)该峰呈无定形。他们将建议通过电子束照射进行轻微的表面融合。

1.Effect on the surface properties of cast TitaniumIn our reports on the surface roughness and glossiness measurement, the surface roughness was significantly decreased after EB irradiation in pure titanium and Ti-6Al-7Nb. In this study we examined the effect of EB irradiation on the properties of corrosion resistance, surface crystalline structure and hardness on pure titanium and Ti-6Al-7Nb alloy. To estimate corrosion resistance, anodic polarization measurement was performed in 0.9%NaCl solution using a potentiostat (standard voltammetry tool HSV-100 HOKUTO DENKO) scanning from -500mV to 2V at a rate of 0.5mV/s. Passive current densities (I_<pass>) at +1000mV vs SCE were determined and compared. In the pure titanium and the Ti-6Al-7Nb alloys, the I_<pass> values after EB irradiation was smaller than those of polished by handwork. X-ray diffraction patterns of before and after EB irradiation were analyzed. After irradiation, half value width of alpha peak of Ti-6Al-7Nb alloy significantly increased. On the other hand, surface hardness after EB irradiation decreased in the pure titanium.2.Effect on the surface properties of Au-Ag-Pd alloy. Specimens of Au-Ag-Pd alloy were made by casting. EB irradiated those specimens after sand blasting with alumina. The crater was generated on the surface. We changed alumina sand to glass beads. So, the surface is smooth. In addition, X-ray diffraction patterns of before and after EB irradiation were analyzed. After EB irradiation, the broad peak appeared. (2 θ=52°) This peak is like to amorphous. They will suggest slight surface fusion by EB irradiation