超细氧化锆对提高金泥涂层耐磨性的实验研究

A study on improving the attrition resistance of the gold-paste layer fused to Ni-Gr alloy through blending Ultra-fine zircomoa.

目的:探索超细氧化锆对金泥涂层耐磨性的影响。方法:在乙醇溶液中分散超细氧化锆,调节pH>7,机械研磨超声振荡后用透射电镜观察分散效果和测定氧化锆粒径;在金泥中分别加入1%、2%、3%、4%、5%的超细氧化锆,均匀涂布烧结于镍铬合金表面,用喷磨实验仪测量金泥涂层的耐磨性,用扫描电镜测量金泥涂层的厚度,计算耐磨系数。结果:超细氧化锆能达到较好的分散效果,氧化锆的粒径为70～200nm,超细氧化锆与金泥混合均匀,分散良好;在金泥中加入2%～4%的氧化锆,金泥的耐磨性显著提高,以加入3%为最佳。结论:在金泥中加入一定比例的超细氧化锆作为填料是一种提高金泥涂层耐磨性的可行方法,以加入3%的浓度为最佳。

Objective： To explore to improve the attrition resistance of the layer blending ultra-fine zircomoa power into the gold-paste. Method： The zircomoa particles were observed by TEM after they had been constanly abraded by hand in alcohol and controlled the PH value at over 7 and vibrated by ultrasound, and then 1 to 5 percent of ultra-fine zircomoa power separately was mixed with gold particles, and then blushed and fused them to Ni-Gr alloy.Test the attrition resistance of the gold-paste layer with an attrition jet test apparatus after polishing. The values of attrition resistance were analysed by ANOVA. Result： The mixture of gold and zireomoa power was uniform and well dispersed. After blending 2-4% zircomoa power into the gold-paste,the attrition resistance rosed obviously. The optimum choise was to mix 3 percent （w%）. Conclusion： Blending ultra-fine zircomoa power into the gold-paste is a feasible way to improve the attrition resistance of the layer. The optimum choise is to mix 3 percent （w%） of ultra-fine zireomoa power into the gold-paste.