聚乙烯醇/羟基磷灰石复合材料的摩擦磨损性能研究

分别利用超声共混法和溶胶凝胶原位复合法制备出聚乙烯醇/羟基磷灰石(PVA-H/HA)复合材料,测定了其拉伸强度和抗剪切强度,并对不同HA含量下的试样进行了摩擦磨损性能研究.结果表明:少量HA的加入能提高复合材料的机械强度和抗磨损性能,利用原位复合法制备的试样机械性能较好,而且当HA含量为3%时复合材料的机械性能最佳;试样的磨损量随着接触载荷的增加而显著上升;在相同HA含量下,原位复合法制备的试样抗磨损性能更佳,当HA含量为4%时,原位复合法制备的复合材料试样的摩擦磨损性能最佳,其磨损量仅为纯PVA-H的29.8%.

Tribological Properties of PVA-H/HA Composites

PVA-H/HA composites were prepared by ultrasonic mix method and in situ synthesis method.The mechanical and tribological properties of specimen with different HA content were measured.Worn surfaces were investigated by using a scanning electron microscope to determine the wear mechanism of pure PVA-H and PVA-H/HA composites prepared by different methods.Experimental results show that filling HA to PVA-H slightly decreased the friction coefficient of composites with increasing of HA content under water lubrication condition.Wear resistance of PVA-H matrix was also greatly improved by the introduction of HA inorganic component.It also found that the PVA-H/HA prepared by in situ method exhibited better tribological properties than those prepared by mix method with the same components and under the same conditions.The composites exhibited the best wear resistance when the HA content was about 4% prepared by in situ synthesis.