Impacting Behavior of Large Oxidized Copper Particles in Cold Spraying
Impacting Behavior of Large Oxidized Copper Particles in Cold Spraying
复制标题
冷喷涂中大氧化铜颗粒的冲击行为
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
H. Liao
中科院分区：
文献类型：
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作者：
Minyxiang Yu;Wenya Li;Xueping Guo;H. Liao
在前人的研究中，实验证明了金属颗粒表面氧化膜对冷喷涂涂层的性能有显著的影响。为了清楚地揭示其潜在的机制，本研究进一步关注了颗粒氧化对氧化铜粉沉积行为的影响。结果表明，颗粒表面氧化膜的存在可以抑制颗粒的塑性变形。此外，关于弹回颗粒的形貌和氧含量的结果表明，颗粒在撞击过程中经历了较大的塑性变形，导致氧化膜破裂。相应地，由于氧化粉末的塑性变形和应变硬化效果较差，沉积涂层的硬度略低于退火粉末。
In a previous study, it has been experimentally demonstrated that surface oxide films of metallic particles have significant influence on the properties of cold-sprayed coatings. To clearly reveal the underlying mechanism, this study focused further on the effect of particle oxidation on the deposition behavior of oxidized Cu powder. Results show that the presence of the oxide films on the particles’ surface can inhibit the plastic deformation of the particles. In addition, results concerning the morphologies and oxygen content of the rebounded particles show that the particles have experienced large plastic deformation that results in the break-up of the oxide films during the impacting process. Correspondingly, the hardness of the coating deposited with the oxidized powder is a little lower than that with the annealed powder because of the inferior plastic deformation and strain-hardening effect.