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The principle of magnetron sputtering is introduced andthe balanced and unbalanced magnetrons are compared andthe necessity of unbalanced magnetrons is explained as well. Several recent developments in plasma magnetron sputtering, i.e., unbalanced magnetron sputtering, pulsed magnetron sputtering and ion assisted sputtering, are discussed. The recent developments of unbalanced magnetron systems and their incorporation with ion sources result in an understanding in growingimportance of the magnetron sputtering technology, which makes the technology an applicable deposition process for a variety of important films, such as wear-resistant films and decorative films. 相似文献
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在各领域科学技术不断的推动之下,雷达技术也渐渐崛起,这就意味着,不仅仅对于雷达的空间体、体积要求更加苛刻,同时还要求在雷达结构的设计上,要符合最先进的设计理念,利用更加先进的仿真软件进行计算和仿真,这就对雷达设计工作者提出了更高层次的要求。本文通过严密的计算和推理介绍了雷达机架及伺服系统和天线框架的刚强度计算和仿真方法。 相似文献
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浅谈混凝土温度应力控制及防裂措施 总被引:1,自引:0,他引:1
混凝土结构中,由温度作用产生的应力常比其他外荷载产生的应力总和还要大,特别是在大体积混凝土结构中。水工混凝土结构中的大部分裂缝属于温度裂缝或干缩裂缝,因此,对混凝土进行温度控制是十分必要的,也是非常重要的。下面,从大体积混凝土及碾压混凝土两个方面来简要论述一下混凝土结构中的温度应力控制及裂缝控制措施。 相似文献
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High spin states of the odd-odd nucleus 122 I have been investigated via the fusion-evaporation reaction 116 Cd(11B, 5n) at a beam energy of 68 MeV. The yrast band is extended up to Iπ=(29+). The band termination at Iπ=(22+) reported in previous studies is confirmed and interpreted as arising from a shape change from collective prolate to noncollective oblate according to Total-Routhian-Surface (TRS) calculations. In addition, the Iπ=(29+) state is assigned to the [πh11/2(πg7/2)2]23/2-[(νh11/2)3(νd5/2)2]35/2-configuration corresponding to the full alignment of all valance nucleons outside the semi-closed shell. 相似文献