Surface morphology and structure of Ni–P, Ni–P–ZrO2, Ni–W–P, Ni–W–P–ZrO2 coatings deposited by electroless method
Surface morphology and structure of Ni–P, Ni–P–ZrO2, Ni–W–P, Ni–W–P–ZrO2 coatings deposited by electroless method
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DOI：
10.1016/j.surfcoat.2007.08.016
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发表时间：
2008-02
影响因子：
5.4
通讯作者：
B. Szczygieł;A. Turkiewicz;J. Serafińczuk
中科院分区：
文献类型：
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作者：
B. Szczygieł;A. Turkiewicz;J. Serafińczuk
制备了Ni-P二元、Ni-W-P三元合金镀层和Ni-P-ZrO 2、Ni-P-W-ZrO 2复合镀层。采用以氨基乙酸为络合剂的镀液。ICP测量表明，取决于涂层类型的P含量在4.7-6.3重量%的范围内。(at pH=6，t=75 °C）。钨含量约为1-2重量%。扫描电镜分析表明，化学镀Ni-P镀层具有最细的晶粒结构。Ni-P-ZrO 2涂层的特征是晶粒呈20 μm左右的微球状。X射线衍射分析表明，在所有涂层中，位于2θ=44°附近的Ni（111）峰最强。涂层在400 °C下热处理1小时后，峰变得更加尖锐。热处理导致微晶尺寸增加近一倍。四元涂层的耐磨性取决于其中存在的第二相（ZrO 2）颗粒。
Electroless binary Ni–P and ternary Ni–W–P alloy coatings and electroless composite (Ni–P–ZrO2and Ni–P–W–ZrO2) nickel coatings were deposited. Baths with aminoacetic acid as the complexing agent were used. ICP measurements showed that the P content depending on the type of coating is in a range of 4.7–6.3 wt.% (at pH=6, t=75 °C). The tungsten content is around 1–2 wt.%. SEM examinations show that the electroless Ni–P coating has the most fine-grained structure. Grains in the form of microspheroids 20 μm in size are characteristic of the Ni–P–ZrO2coating. X-ray diffraction patterns show that for all the obtained coatings peak Ni(111) located around 2θ=44° is the most intensive. After the coatings are heat treated at 400 °C for 1 h the peak becomes even sharper. The heat treatment results in a nearly double increase in crystallite size. The quaternary coatings' abrasion resistance is determined by the second-phase (ZrO2) particles present in them.