HDPE/CaCO3断口样品制作与分析

对HDPE／CaCO3填充高分子材料SEM样品制作的镀材种类及镀金参数进行了选择，得出了适宜的镀金相关参数：喷镀时间为45min，喷镀电流为0．2-0．8mA,并将其应用于该材料的断口分析，其图像清晰，结果可靠．     

7.5MHz声-喷注镀金和铜

R.J.von Gutfeld等人报道,以7.5MHz的聚焦声通过喷射器中心对基片镀金或铜,与单独的喷镀技术比较,在声场作用下,改善了金和铜镀层的电积结构.对两种方式喷镀的样品做扫描电子显微检查发现,有声场作用时,镀层具有较为致密的电积,有更为密集的柱状晶生长结构.而没有加声的镀层,其镀层结构较疏松,有枝蔓状晶生长.经测量,声-喷注镀     

Heat Transfer from a dc Laminar Plasma—Jet Flow to Different Solid Surfaces

The beat flux distributions were measured by using transient method for an argon dc laminar plasma-jet flow impinging normally on a plate surface embedded with copper probes.Different powders were coated on the probe surfaces and the effect of powder coating on the heat transfer from jet flow to the probe surface was examined Experimental results show that the maximum values of the heat flux to the probe increase with the coating of fine metal powders,while for the surfaces coated with fine ceramic powders,the maximum values of heat flux decrease,compared with that to the bare copper probe surface.