当前位置: X-MOL 学术Arch. Civ. Mech. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Tribological properties of hybrid aluminium matrix composites reinforced with boron carbide and ilmenite particles for brake rotor applications
Archives of Civil and Mechanical Engineering ( IF 4.4 ) Pub Date : 2022-12-17 , DOI: 10.1007/s43452-022-00569-4
Rahul Gupta, Tarun Nanda, O. P. Pandey

In the present study, stir casting process was employed to incorporate a blend mixture of ilmenite (FeTiO3) and boron carbide (B4C) particles in the matrix of LM13 base alloy. The study demonstrated the effect of individual reinforcement, weight percentage and mixing proportion on wear behaviour of LM13 alloy for brake rotor applications. Composite with 15 wt.% of reinforcement having 75% proportion of boron carbide (15BI-31 composite) shows change in silicon morphology to globular and highest refinement of silicon structure. Highest wear resistance, highest hardness, lowest coefficient of thermal expansion and lowest friction coefficient values were obtained for 15BI-31 composites. The addition of ilmenite particles enhances the properties of BI composites by making the strong interfacial bonding and enhancing the oxidation rate of sliding surface. However, the increase in dislocation density by boron carbide particles helps in enhancing the hardness of composites which contributes in providing the stability to mechanical mixed layer. The comparable wear property (17% higher wear rate), low processing cost and low material cost of 15BI-31 composite make it a suitable material for brake rotor applications. The predominant wear mechanism for composites was observed to be abrasive wear and delamination wear. However, the severity of wear mechanism changes as the applied load increases.



中文翻译:

用于制动转子应用的碳化硼和钛铁矿颗粒增强的混合铝基复合材料的摩擦学性能

在本研究中,采用搅拌铸造工艺将钛铁矿 (FeTiO 3 ) 和碳化硼 (B 4C) LM13 基合金基体中的颗粒。该研究证明了单独的增强材料、重量百分比和混合比例对用于制动转子应用的 LM13 合金的磨损行为的影响。具有 75% 碳化硼比例的 15 wt.% 增强材料的复合材料(15BI-31 复合材料)显示出硅形态向球形的变化以及硅结构的最高细化。15BI-31 复合材料获得了最高的耐磨性、最高的硬度、最低的热膨胀系数和最低的摩擦系数值。钛铁矿颗粒的加入通过增强界面结合和提高滑动表面的氧化速率来增强BI复合材料的性能。然而,碳化硼颗粒增加位错密度有助于提高复合材料的硬度,这有助于为机械混合层提供稳定性。15BI-31 复合材料具有可比的耐磨性能(磨损率高 17%)、低加工成本和低材料成本,使其成为制动转子应用的合适材料。观察到复合材料的主要磨损机制是磨粒磨损和分层磨损。然而,磨损机制的严重程度随着施加载荷的增加而变化。观察到复合材料的主要磨损机制是磨粒磨损和分层磨损。然而,磨损机制的严重程度随着施加载荷的增加而变化。观察到复合材料的主要磨损机制是磨粒磨损和分层磨损。然而,磨损机制的严重程度随着施加载荷的增加而变化。

更新日期:2022-12-17
down
wechat
bug