电弧

The anti-erosion performance of NiWC35 spraying and fuzing coating is better than other spraying and fuzing coatings because of 35% cermet WC in it.

电弧喷涂LX88A金属陶瓷涂层由于在电弧喷涂过程中发生化学反应生成含有金属陶瓷硬质相Fe3B，因此具有优良的抗冲蚀性能。

In this thesis, the load current arc conditioning effect on the postarc restrikes has been investigated by using a synthetic circuit, experiments show that the restrikes can be decreased by using arc conditioning process with polarity effect.

本文在合成回路上研究了负载电流电弧的老炼作用，发现负载电流电弧老炼可以明显地降低弧后延时重击穿率，这种老炼具有极性效应。

Moreover, it shows that with air vents opened to 20%, 60% and 100%, the arc can arrive in the splitter plates successfully under 10mT magnetic field without restriking.

此外，还发现当磁场为10mT时，在出口面积分别为20%、60%和100% 3种情况下电弧均可以顺利到达栅片，在运动的过程中没有电弧重击穿现象的发生。

While using this testing system to observe arc moving in the limiter, it was found that the local restriking near the entrance to iron chute was the cause of arc voltage drop.

利用该测试系统，在研究限流器中电弧运动过程时发现，存在于栅片入口附近空间的局部重击穿现象，是导致分断过程中电弧电压跌落的重要原因。

In the previous issue on the basis of the theory, structure based on the 8051 MCU EAF arc length waveform generator system, through a link on the waveform of the hardware and software to achieve a further wave of EAF the main circuit hardware simulation.

本课题在前人的理论基础上，构造了基于8051单片机的电弧炉弧长波形产生系统，通过对波形的发生环节的软硬件实现产生波形进而对电弧炉主电路的硬件进行仿真。

Ablation-controlled arc plasma generator is a critical component of energy transition in electrothermal -chemical launch system. Systematic research on piccolo injector is carried out in the dissertation. The main points are as follows: 1 The nature of discharge of piccolo injector is discussed.

本文以国防科技重点预研项目&电热化学炮总体与发射技术研究&为背景，对电热化学炮中电热转换的核心部件—中心电弧等离子体发生器，进行了理论分析、工程设计和实验研究，将中心电弧式等离子体发生器成功地应用到电热化学发射实验中，主要内容包括以下几个方面： 1。

The pulsed power supply used to perform the experiments consisted of three modules storing 800kJ as a driver for an ablation-controlled arc plasma generator. A sequence of tests in which the capillary radius, length and ablated material are varied and in which the capillary power dissipation levels are varied in a certain range are discussed in order to determine the impedance matching between the discharge and the power source.

利用一个总贮能800kJ的模块化电容基脉冲功率源系统为消融控制电弧等离子体发生器强流放电提供电能输入，在一定的参数变化范围内，实验研究了脉冲功率源初始放电参数、等离子体发生器几何参数以及消融材料对消融控制电弧放电特性的影响规律。

The experiment of the auxiliary heated arc plasma generator shows that thekey arc root has contraction under the condition of having magnetic field when thekey arc root is at the edge of the cathode surface.

在辅助加热电弧等离子体发生器的实验中看到：在有外磁场的情况下，主弧弧根在阴极边缘时，弧根有收缩的迹象，而当主弧弧根在阴极中心附近时，观察不到明显的弧根收缩迹象，并拍摄到有双弧柱的图片；当关掉磁场和弧电流〓时，主弧在阴极和阳极之间稳定的燃烧，主弧弧根稳定在阴极中心附近的一点上，而且弧根没有收缩的迹象，主弧弧根亮区的直径约为6.8毫米，与弧柱段的亮区直径相差无几；因而从实验结果分析可以看出，阴极表面温度的升高，能使主弧弧根直径增大：另一方面，由于主弧弧根直径的增大(即也意味着主弧弧根截面积的增大)，因而使电弧通过主弧弧根传入阴极表面的有效比热流降低，从而减少了阴极烧损。

ABSTRACT This dissertation is devoted to the theoretical and experimental studies on vacuum arc deposition process.

本论文在全面系统地总结了现有关于真空电弧沉积薄膜研究成果的基础上，针对本领域基础研究不足的现状，选定当前真空电弧沉积薄膜过程中的难题为研。。。

As the whole burning process of arc reflects the actual arc physical process, it records the process by high-speed photography.

由于电弧的整个引燃过程反映了电弧的实际物理过程，本文对这一过程进行了高速摄影。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。