| Investigation on in-flight particle velocity in supersonic plasma spraying |
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| 作者姓名： | 李长青 马世宁 叶雄林 |
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| 作者单位： | Faculty of Remanufacturing Engineering，The Academy of Armored Forces Engineering，Beijing，100072，Faculty of Remanufacturing Engineering，The Academy of Armored Forces Engineering，Beijing，100072，Faculty of Remanufacturing Engineering，The Academy of Armored Forces Engineering，Beijing，100072 |
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| 摘 要： | 0Introduction Asakindofsurfaceengineeringtechnology,thermal sprayingcanprovideprotectiveorfunctionalcoatings whicharewidelyusedinmanyindustrieslikechemistryin dustry,papermaking,electricengineering,powerplant, aviation,automobileproducing,steelmill,glass…
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| 关 键 词： | 等离子体溅射 超声波 焊接工艺 飞行颗粒 CCD图像 |
Investigation on in-flight particle velocity in supersonic plasma spraying |
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| Li Changqing,Ma Shining,Ye Xionglin.Investigation on in-flight particle velocity in supersonic plasma spraying[J].China Welding,2005,14(1):80-84. |
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| Authors: | Li Changqing Ma Shining Ye Xionglin |
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| Abstract: | In-flight particle velocity and flux distribution were measured using CCD thermal spray monitor system during supersonic plasma spray processing with nano-structured Al203-TiO2 feed stocks. According to the results of particle flux measurement, the largest radian of the divergent particle stream is about 0. 2. Within the measuring range, top speed of inflight particles reached 800 m/s. Particle acceleration was accomplished within 4 cm down stream of the nozzle. Average particle velocity ( about 450 m/s) exceeded local sound speed (340 m/s) even at a mean standoff distance of 17 cm. With increasing mean standoff distance, average velocity of in-flight particle decreased according to a parabolic rule approximately.Image diagnosis showed that the result of in-flight particle velocity measurement is credible. |
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| Keywords: | supersonic plasma spraying in-flight particle velocity CCD image process |
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