A comparison of cold spray deposition behavior between gas atomized and dendritic porous electrolytic Ni powders under the same spray conditions
A comparison of cold spray deposition behavior between gas atomized and dendritic porous electrolytic Ni powders under the same spray conditions
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相同喷涂条件下气雾化和树枝状多孔电解镍粉冷喷涂沉积行为的比较
DOI：
10.1016/j.matlet.2015.10.048
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发表时间：
2016-01-15
影响因子：
3
通讯作者：
Li, Chang-Jiu
中科院分区：
文献类型：
--
作者：
Luo, Xiao-Tao;Li, Yu-Juan;Li, Chang-Jiu
采用多孔枝晶电解镍（E Ni）粉末和气体雾化镍（GA Ni）粉末两种Ni粉末，在相同的喷涂参数下进行冷喷涂，考察沉积行为对粉末微观结构的影响。GA，Ni粉末沉积不成功，而多孔的不规则E Ni粉末沉积致密，沉积效率高达73.3%。这与E - Ni颗粒的不规则形貌和多孔结构有关。随着颗粒预热步骤的增加，不规则的形貌有助于提高颗粒的冲击速度和温度。多孔结构降低了临界速度。结果表明，通过在原料中引入不规则形貌和/或孔隙，冷喷涂可以更容易地沉积高质量的金属涂层。(C) 2015 Elsevier B.V.版权所有
Two Ni powders, a porous dendritic electrolytic nickel (E Ni) powder and a gas atomized nickel (GA Ni) powder, were cold sprayed under the same spraying parameters to evaluate the dependence of deposition behavior on powder microstructure. GA,Ni powder was not successfully deposited while a dense coating was obtained with porous irregular E Ni powder with a high deposition efficiency of 73.3%. This was ascribed to both irregular morphology and porous microstructure of E Ni particles. With a particle preheating step, irregular morphology contributes to both higher impact velocity and higher particle temperature. Porous microstructure leads to lower critical velocity. The results indicate that, via introducing irregular morphology and/or pores into the feedstock, metallic coatings of high quality can be easier deposited by cold spray. (C) 2015 Elsevier B.V. All rights reserved.