The effect of thermal treatment on microstructure and tribological behavior of Al-7Si/ZrSiO₄ reinforced composites has been investigated. Composites with 5, 10 and 15 vol.% of ZrSiO₄ particles were produced using stir casting process. Produced composite samples were then further subjected to T6 heat-treatment by subjecting the cast samples for solution treatment for 4 h at 540 °C followed quenching in water and artificial ageing at 170 °C for 5 h. Microstructure of the composite samples revealed uniform distribution of ZrSiO₄ particles. Hardness of the T6 thermal treated samples was found to be superior to that of Al-7Si alloy and hardness of the composite samples increased with increase in wt.% of ZrSiO₄ particles. Non heat treated alloy and composite reinforced with 15 wt% of ZrSiO₄ possessed a maximum hardness of 68 BHN and 110 BHN respectively. Whereas T6 heat treated Al-7Si alloy and composite reinforced with 15 wt% of ZrSiO₄ exhibited a maximum hardness of 84 BHN and 146 BHN respectively. T6 treated composites exhibited superior resistance to wear, when compared to the base alloy. As cast Al-7Si alloy exhibited maximum wear rate of 14.3 × 10⁻³ mm³/m, where as non heat treated 15 wt.% ZrSiO₄ reinforced composites exhibited a wear rate of 7.6 × 10⁻³ mm³/m and wear rate was found to further reduce to 4.0 × 10⁻³ mm³/m by T6 treatment. SEM images of the wear tested samples showed the adhesive wear and abrasive wear as the dominant wear mechanisms.

研究了热处理对Al-7Si / ZrSiO ₄增强复合材料的显微组织和摩擦学行为的影响。使用搅拌铸造法生产具有5、10和15体积％的ZrSiO ₄颗粒的复合材料。然后，通过使铸件样品在540°C下固溶处理4 h，然后在水中淬火并在170°C进行人工时效5 h，对制成的复合样品进行T6热处理。复合样品的微观结构显示出ZrSiO ₄颗粒的均匀分布。发现T6热处理样品的硬度优于Al-7Si合金，并且复合样品的硬度随ZrSiO _4的wt。％的增加而增加粒子。未经热处理的合金和由15 wt％的ZrSiO ₄增强的复合材料的最大硬度分别为68 BHN和110 BHN。而经T6热处理的Al-7Si合金和用15 wt％的ZrSiO ₄增强的复合材料的最大硬度分别为84 BHN和146 BHN。与基础合金相比，经T6处理的复合材料具有优异的耐磨性。铸造的Al-7Si合金的最大磨损速率为14.3×10 ^-3  mm ³ / m，其中未经热处理的15 wt。％ZrSiO ₄增强复合材料的磨损速率为7.6×10 ^-3  mm ³ / m和磨损发现速率进一步降低至4.0×10 ^-3  mm ³/ m通过T6处理。磨损测试样品的SEM图像显示粘合剂磨损和磨料磨损是主要的磨损机理。