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采用复合电沉积方法在紫铜片上制备碳纳米管铅锡合金复合减摩镀层;用阴极弯曲法研究了电流密度和镀液温度对碳纳米管铅锡复合镀层内应力的影响;在不同碳纳米管浓度的镀液中制备了复合镀层的试样,用X射线衍射法测定了各复合镀层的内应力。结果表明,碳纳米管铅锡合金复合镀层的内应力随电流密度的增加而升高,但随镀液温度的升高而降低。保证电流密度和镀液温度不变,碳纳米管的含量为2 g/L,复合镀层的内应力降至最低;碳纳米管在镀层中的弥散分布起到了应力传递作用,减少了应力集中而产生的微裂纹。
The composite electrodeposition method was used to prepare the composite anti-friction coating of lead-tin-carbon nanotubes on copper foil. The influence of current density and bath temperature on the internal stress of the lead-tin composite coating was investigated by cathodic bending method. In different carbon nanotubes The composite coating samples were prepared by X-ray diffractometry. The internal stress of each composite coating was measured by X-ray diffraction. The results show that the internal stress of the lead-tin alloy composite coating increases with the increase of the current density, but decreases with the increase of the bath temperature. The current density and the bath temperature were kept constant, the content of carbon nanotubes was 2 g / L, and the internal stress of the composite coating was reduced to a minimum. The dispersion distribution of carbon nanotubes in the coating played a role of stress transfer and reduced the stress concentration The resulting microcracks.