纳米SiC颗粒对微米Ni-SiC复合镀层性能的影响

发布时间：2018-02-12 23:24

  本文关键词： Ni-SiC复合镀层 微米SiC 耐磨 抗氧化性能　出处：《中国有色金属学报》2015年06期 　论文类型：期刊论文

【摘要】：采用双脉冲复合电镀技术,在瓦特型镀液中,制备了含微/纳米SiC颗粒的Ni基复合镀层,研究镀液中纳米SiC添加量对复合镀层微观形貌、摩擦性能和抗氧化性能的影响。结果表明:在SiC颗粒(5μm)浓度为10 g/L的镀液中,添加纳米SiC和Ni-SiC复合镀层镍择优取向由晶面(200)转变为晶面(111);当SiC(40μm)浓度为4.0 g/L时,复合镀层显微硬度最大,为456 HV;复合镀层摩擦因数最小,平均值为0.28,为微米复合镀层的1/2;经900℃氧化100 h后,氧化质量增加为6.025 mg/cm2,为微米复合镀层的1/3。
[Abstract]:Ni based composite coatings containing micro / nano SiC particles were prepared in Watt bath by double pulse composite electroplating technology. The microstructure of the composite coatings was studied by the addition of nano SiC in the bath. The results show that when the concentration of SiC particles is 5 渭 m), the Ni preferred orientation of SiC and Ni-SiC composite coatings is changed from crystal plane to crystal plane, and when the concentration of SiC(40 渭 m is 4. 0 g / L, the preferred orientation of Nano SiC and Ni-SiC composite coating is changed from crystal plane to crystal plane, when the concentration of SiC(40 渭 m is 4. 0 g / L. The microhardness of composite coating is the highest (456 HVV), the friction coefficient of composite coating is 0.28, which is 1 / 2 of that of micron composite coating, the oxidation mass of composite coating increases to 6.025 mg / cm ~ 2 after oxidation at 900 鈩，

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