球磨冷压烧结制备TNZS基生物材料的摩擦学性能

Tribological property of TNZS-based biomaterials prepared by milling, cold pressed and sintering

摘要:

采用机械高能球磨、常规模压和真空无压烧结相结合的粉末冶金法制备TNZS、TiO2/TNZS及HA/TNZS三种钛基生物医用材料, 对比研究了三种材料的在不同摩擦条件下的摩擦学行为及显微硬度。结果表明：在室温、载荷100 g、频率10 HZ、干摩擦条件下，与Si3N4陶瓷球对摩15 min，HA/TNZS钛基生物医用材料具有较低的摩擦系数和最高的耐磨损性，TNZS、TiO2/TNZS及HA/TNZS三者摩擦系数分别为0.4323、0.5643和0.4338，平均磨痕宽度分别为0.33 mm、0.26 mm和0.18 mm，磨损机理都是磨粒磨损为主，氧化磨损、粘着磨损为辅；TNZS、TiO2/TNZS及HA/TNZS钛基生物医用材料在人工体液摩擦条件下的平均摩擦系数和磨损情况都优于干摩擦下的平均摩擦系数与磨损情况，HA/TNZS生物钛基材料的耐磨性优于其它两者，三者平均摩擦系数分别为0.3309、0.4301和0.3840，平均磨痕宽度分别为0.27 mm、0.19 mm和0.17 mm，磨损机理都是磨粒磨损为主，伴有轻微氧化磨损和粘着磨损；TiO2/TNZS的显微硬度值最高，三者的显微硬度值分别为525.43 HV、551.23 HV和479.27 HV。

Abstract:

TNZS, TiO2/TNZS, HA/TNZS titanium-based biomedical materials were prepared by powder Metallurgy comebining high-energy ball milling, conventional vacuum and non-pressure sintering. The tribological properties and microhardness of the three sintering bodies were investigated. The results show that under the condition of room temperature, load of 100 g, frequency of 10 HZ, dry friction and Si3N4 ceramic ball for 15 min, HA/TNZS titanium-based biomedical material has low friction coefficient and the best wear resistance; friction coefficients are 0.4323, 0.5643 and 0.4338, and the average width of wear scars are 0.33 mm, 0.26 mm and 0.18 mm, respectively ; wear mechanism of all is abrasive wear, supplemented with oxidation wear and adhesive wear; the average friction coefficients and wear of all materials under artificial body fluid are better than those under dry friction , and wear resistence of HA/TNZS is better than the other two; the average friction coefficient of all are 0.3309, 0.4301 and 0.3840, and the average width of wear scars are 0.27 mm,0.19 mm and 0.17 mm, respectively; wear mechanism are abrasive wear, accompanied by mild oxidation wear and adhesive wear；TiO2/TNZS has the highest microhardness value, and the microhardness values of the three are 525.43 HV, 551.23 HV and 479.27 HV.