Titanium64 has characteristics well sought after for applications in demanding environments. In general, due to titanium64’s high performance, it is a material which requires careful and well considered machining app...Titanium64 has characteristics well sought after for applications in demanding environments. In general, due to titanium64’s high performance, it is a material which requires careful and well considered machining approaches in order to optimize the process. Nano-structured bainitic steel whilst having different application bases does none the less have similar machining and machinability short comes as that of titanium64. These similar characteristics have been compared and contrasted in this research study using parameters including cutting force, surface texture and metallography. The results tend to indicate that titanium64 has a poorer machinability characteristics compared to nano-structured bainitic steel. However, in terms of achieving greater surface texture characteristics, the nano-structured bainitic steel exhibited an enhanced capacity.展开更多
文摘Titanium64 has characteristics well sought after for applications in demanding environments. In general, due to titanium64’s high performance, it is a material which requires careful and well considered machining approaches in order to optimize the process. Nano-structured bainitic steel whilst having different application bases does none the less have similar machining and machinability short comes as that of titanium64. These similar characteristics have been compared and contrasted in this research study using parameters including cutting force, surface texture and metallography. The results tend to indicate that titanium64 has a poorer machinability characteristics compared to nano-structured bainitic steel. However, in terms of achieving greater surface texture characteristics, the nano-structured bainitic steel exhibited an enhanced capacity.
文摘以铝片为基底,采用溶胶凝胶法,制备疏水防腐涂层。以纳米Ti O2和聚二甲基硅氧烷为原料,通过硬脂酸使纳米Ti O2表面由亲水性变成疏水性,然后将改性后的Ti O2与聚二甲基硅氧烷复合,经机械共混、热处理、浸渍提拉等过程,形成超疏水防腐涂层。涂层表面形貌和疏水性采用X射线衍射仪、傅里叶红外光谱仪、扫描电镜、接触角分析仪等进行表征。结果表明,复合涂层表面具有微/纳米双重粗糙结构,与水的静态接触角为155°,滚动角8°;采用极化曲线和交流阻抗等电化学法对涂层防腐性能进行表征,结果表明,其腐蚀电位较纯聚二甲基硅氧烷涂层正移0.2 V,而相比裸铝片,腐蚀电位从-926 m V正移至-525 m V,腐蚀电流密度从4.68×10-5A/cm2下降至5.69×10-6A/cm2。