Author:Hao Zhang ^abc, Yueming Li ^d, Zikuan Xu ^ab, Ying Fu ^c, Meishuan Li ^ab, Jixin Chen ^a b

Journal: JComposites Part A: Applied Science and Manufacturing

DOI: https://doi.org/10.1016/j.compositesa.2024.108500

Abstract / 摘要

The first ternary layered ceramic reinforced copper matrix composites, Cu-xYB2C2 (x = 0, 5, 10, 20 vol%) composites without interfacial reaction were successfully fabricated by spark plasma sintering at 950 °C. Microstructures, phase compositions, mechanical properties and tribological behaviors of Cu-YB2C2 composites were investigated. The results indicated that Cu-YB2C2 composites had good chemical compatibility. Compared with pure copper, the hardness, tensile strength and wear resistance of Cu-YB2C2 composites were all significantly improved. Cu-10 vol% YB2C2 composites exhibited the highest tensile strength and the best tribological performance, with an ultimate tensile strength of 203 ± 2 MPa and a wear rate of (3.1 ± 0.4) × 10−8 mm3/mm. The wear mechanism changed from adhesive wear to a combination of adhesive wear and abrasive wear with the addition of YB2C2, while surface oxidation and fatigue were also present in all tribosystems. Cu-YB2C2 composites have application prospects in electrical contacts and aerospace fields.

Keyword / 关键词

Metal-matrix composites;Microstructure analysis;Mechanical properties;Wear