Abstract Novel interpenetrating phase composites (IPCs) were produced by infiltrating ZA8 alloy into sintered 304 stainless steel fiber preforms through squeeze casting. Microstructural characteristics and dry sliding wear behavior of the IPCs at room and elevated temperatures under different applied loads were investigated. The results indicate that the microstructures and wear behavior of the IPCs exhibit anisotropy. The IPCs have better wear resistance properties and lower friction coefficients in the longitudinal direction compared to the radial direction. Compared with the unreinforced alloy, the composites exhibit lower friction coefficients at both room and elevated temperatures, and the wear rate of the IPC is higher at room temperature and significantly lower at 120 °C. The friction coefficients and wear rates of the IPCs first decrease and then increase with increasing fiber fraction. The IPC with 35.98 vol% has the best wear resistance. For the IPCs, a higher applied load leads to a higher friction coefficient and wear rate. The predominant wear mechanisms for the ZA8 alloy are delamination wear, which becomes more severe with increasing applied load at room temperature, and plastic deformation and adhesive wear at 120 °C, and the IPCs show predominant abrasive (ploughing) wear and slight delamination wear. Abrasive wear becomes more severe for a too high fiber fraction at both temperatures.

中文翻译：

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挤压铸造新型不锈钢/ZA8合金互穿相复合材料的各向异性干滑动摩擦磨损性能

摘要 通过挤压铸造将 ZA8 合金渗透到烧结的 304 不锈钢纤维预制件中，制备了新型互穿相复合材料 (IPCs)。研究了 IPC 在室温和高温下不同外加载荷下的显微结构特征和干滑动磨损行为。结果表明，IPCs 的微观结构和磨损行为表现出各向异性。与径向相比，IPC 在纵向具有更好的耐磨性和更低的摩擦系数。与未增强合金相比，该复合材料在室温和高温下均表现出较低的摩擦系数，IPC 的磨损率在室温下较高，在 120 °C 时显着降低。IPC 的摩擦系数和磨损率随着纤维含量的增加先降低后增加。35.98 vol%的IPC具有最好的耐磨性。对于 IPC，较高的施加载荷会导致较高的摩擦系数和磨损率。ZA8 合金的主要磨损机制是分层磨损，在室温下随着施加载荷的增加，分层磨损变得更加严重，在 120°C 下塑性变形和粘着磨损，IPC 显示出主要的磨料（犁）磨损和轻微分层磨损。在两种温度下，如果纤维含量过高，磨料磨损会变得更加严重。ZA8 合金的主要磨损机制是分层磨损，在室温下随着施加载荷的增加，分层磨损变得更加严重，在 120°C 下塑性变形和粘着磨损，IPC 显示出主要的磨料（犁）磨损和轻微分层磨损。在两种温度下，如果纤维含量过高，磨料磨损会变得更加严重。ZA8 合金的主要磨损机制是分层磨损，在室温下随着施加载荷的增加，分层磨损变得更加严重，在 120°C 下塑性变形和粘着磨损，IPC 显示出主要的磨料（犁）磨损和轻微分层磨损。在两种温度下，如果纤维含量过高，磨料磨损会变得更加严重。