Effect of load on the friction and wear characteristics of Si3N4-hBN ceramic composites sliding against steels
Effect of load on the friction and wear characteristics of Si3N4-hBN ceramic composites sliding against steels
复制标题
载荷对 Si3N4-hBN 陶瓷复合材料与钢滑动摩擦磨损特性的影响
DOI：
10.1016/j.ceramint.2016.12.084
复制
发表时间：
2017-04-01
影响因子：
5.2
通讯作者：
Ai, Xu
中科院分区：
文献类型：
--
作者：
Chen, Wei;Zhang, Da;Ai, Xu
采用MMW-1型立式万能摩擦磨损试验机，研究了Si 3 N4-hBN陶瓷复合材料在不同载荷下与奥氏体不锈钢（ASS）和45钢干摩擦副的摩擦学行为。结果表明，在干摩擦条件下，随着载荷的增加，摩擦系数和磨损率呈现先减小后增大的趋势。在20 N载荷下，SN 10/ASS滑动副具有较好的摩擦学性能（摩擦系数低至0.27，销和盘的磨损率均为10（-6）mm（3）N-1 m（-1））。这可以归因于黑色表面膜（由B2 O3、SiO2和Fe 2 O3组成）的形成。对于同一滑动副，当载荷为10 N时，磨损机制以磨粒磨损为主。因此，摩擦系数较高（0.7）。当载荷增加到30和50 N时，SN 10/ASS滑动副的磨损机制为磨粒磨损和粘着磨损的组合，并获得较高的摩擦系数（30和50 N载荷下分别为0.48和0.72）。另外，hBN含量对Si 3 N4-hBN/ASS摩擦副的摩擦学性能也有显著影响。当hBN含量小于10%时，Si 3 N4-hBN/ASS滑动副的摩擦系数随着hBN含量的增加而降低。另一方面，在hBN含量为10%或更高时，滑动副的摩擦系数随着hBN含量的增加而增加。在相同的实验条件下，Si 3 N4-hBN/45钢摩擦副的摩擦学性能比Si 3 N4-hBN/ASS摩擦副的摩擦学性能差。
The tribological behaviors of Si3N4-hBN ceramic composites sliding against steels (austenitic stainless steel (ASS) and 45 steel) under dry friction conditions at different loads were investigated by using an MMW-1 type vertical universal friction and wear tester. The experimental results showed that the friction coefficients and wear rates first showed a decrease and then an increase with an increase in the load under dry friction conditions. The better tribological performance was exhibited by the SN10/ASS sliding pair under a load of 20 N (the friction coefficient was as low as 0.27 and the wear rates of both pin and disc had a magnitude of 10(-6) mm(3) N-1 m(-1)). This may be attributed to the formation of a black surface film (consisting of B2O3, SiO2, and Fe2O3). For the same sliding pair, when the load was 10 N, the dominating wear mechanism was abrasive wear. Hence, the friction coefficient was higher (0.7). When the load increased to 30 and 50 N, the wear mechanism of the SN10/ASS sliding pair was a combination of abrasive and adhesive wears, and higher friction coefficients (0.48 and 0.72 under loads of 30 and 50 N, respectively) were obtained. On the other hand, the contents of hBN also showed a significant impact on the tribological behaviors of the Si3N4-hBN/ASS sliding pairs. When the hBN content was less than 10%, the friction coefficients of the Si3N4-hBN/ASS sliding pairs decreased with an increase in the hBN content. On the other hand, at hBN contents of 10% or more, the friction coefficients of the sliding pairs increased with an increase in the hBN content. Under the same experimental conditions, the Si3N4-hBN/45 steel pairs showed poor tribological properties as compared with the Si3N4-hBN/ASS pairs.