磁场下化学复合镀镍-磷-金刚石镀层性能的研究

Study on properties of electroless composite Ni-P-Diamond coatings under magnetic field

为了提高复合镀层的耐磨性、改善复合镀层的结合力、硬度,在不同的磁场强度和不同的金刚石添加量下进行了化学复合镀,于铜基体表面制备了一层镍-磷-金刚石复合镀层,然后对镀层性能进行表征。结果表明,金刚石粒子含量为2g/L^4g/L时,随着磁场强度的增大,镀层的厚度逐渐增大,而当金刚石粒子含量增加到6g/L时,镀层的厚度逐渐减小;金刚石含量4g/L时,镀层摩擦系数随磁场增大而降低;结合力在各金刚石含量下随磁场的增大先略微减小后大幅增加;各金刚石含量下镀层硬度随磁场的增大先增大后减小,磁场强度2.6m T、金刚石粒子含量为4g/L时最大。

In order to enhance the wear resistance of the composite coating and improve the binding force as well as the hardness of the composite coating,the electroless composite coating has been carried out under different magnetic field strengths and different diamond addition volumes.A layer of nickel-phosphorus-diamond composite coating has been prepared on the surface of copper matrix and then the properties of the coatings have been characterized.The results show that when the content of diamond particles is 2g/L to 4g/L,the thickness of the coating increases with the increase of the magnetic field strength;but when the diamond particle content increases to 6g/L,the thickness of the coating decreases;when the diamond content is 4g/L,the friction coefficient decreases with the increase of the magnetic field;in each diamond content,the coating binding force firstly decreases slightly and then increases sharply with the increase of the magnetic field;the hardness of the coating under each diamond content increases firstly and then decreases,which reaches the maximum when the magnetic field strength is 2.6mT while the diamond particles content is 4g/L..