权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Surface modification of dental alloy by electron-beam system.

通过电子束系统对牙科合金进行表面改性。

基本信息

批准号：
16591944
负责人：
MUTOBE Yoshihiko
金额：
$ 2.3万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16591944/
关键词：
surface modification electron beam polishing 歯科用金属

项目摘要

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

1.对铸钛表面性能的影响在我们关于表面粗糙度和光泽度测量的报告中，纯钛和Ti-6Al-7 Nb的表面粗糙度在电子束辐照后显著降低。本文研究了电子束辐照对纯钛和Ti-6Al-7 Nb合金的耐蚀性、表面晶体结构和硬度的影响。为了评估耐腐蚀性，使用恒电位仪（标准伏安法工具HSV-100 HOKUTO DENKO）以0.5mV/s的速率从-500mV扫描至2 V，在0.9%NaCl溶液中进行阳极极化测量。测定<pass>并比较了+1000mV vsSCE的钝化电流密度（I_）。在纯钛和Ti-6Al-7 Nb合金中，经<pass>电子束辐照后的I值小于手工抛光的I值。分析了电子束辐照前后的X射线衍射图谱。辐照后，Ti-6Al-7 Nb合金的α峰半峰宽显著增加。另一方面，纯钛经电子束辐照后表面硬度降低。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合金试样。在用氧化铝喷砂后，对这些试样进行EB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。所以，表面是光滑的。此外，分析了EB辐照前后的X射线衍射图。经电子束辐照后，出现宽峰。（2 θ=52°）该峰似非晶态。他们将建议轻微的表面融合的电子束照射