| 摘要 |
A device and a method for plasma spraying are disclosed. The device compr ises, a cathode, an anode, a plasma channel formed by the anode and intermed iate electrodes, and one or more flowable material injectors. The plasma cha nnel has a throttling portion that divides the plasma channel into a high pr essure portion near the cathode formed by at least one intermediate electrod e and a low pressure portion near the anode. During operation, a plasma gene rating gas is heated by the arc maintained between the cathode and the anode , forming plasma. When the plasma passes through the throttling portion, its speed increases to a supersonic speed, and at the same time its static pres sure drops. Flowable materials are injected in the plasma flow in the low pr essure portion. The particles in the flowable materials are heated by the pl asma and the resultant heated particles and plasma are output from the outle t of the plasma channel.
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