材料科学
复合数
镁
微观结构
摩擦学
粉末冶金
复合材料
多孔性
金属基复合材料
刹车片
冶金
氧化物
摩擦系数
制动器
作者
B Praveenkumar,Darius Gnanaraj Solomon,Ram Prabhu T
标识
DOI:10.1177/14644207231177499
摘要
Magnesium metal matrix composites for lightweight brake pad applications are developed in this study. The composites are fabricated by using the powder metallurgy process. The addition of 0.5 wt.% to 2 wt.% Y 2 O 3 (Rare Earth Oxide) used as a reinforcement to the AZ31 Mg composite is investigated. Density, hardness, and tribometer tests are carried out according to the ASTM standards. The friction and wear test of magnesium composites is tested against the grey cast iron disc. FESEM analysis shows the microstructure and morphology of worn surfaces. The elemental mapping result depicts that the elements of Mg, Al, Zn, Y, and O are uniformly distributed in the composite. X-ray diffraction analysis shows the compounds of Y 2 O 3 , MgO, ZnO, and Al 2 O 4 are present on the worn surface of AZ31 + 2 wt.% Y 2 O 3 composite. The outcome of the experiment reveals that increasing the proportion of yttrium oxide increases the magnesium composite's density and decreases the porosity. AZ31 + 2 wt.% Y 2 O 3 composite exhibits the highest hardness of 122HV, a stable coefficient of friction, and a lower wear rate compared to AZ31 + 0 wt.% Y 2 O 3 composite.
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