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制备体积分数分别为0、1.5%、3%、5%和10%B4C颗粒增强Mg金属基复合材料,研究其力学性能和磨损行为.在450℃和不同加载速率下,分别采用分离式霍普金森棒(SHB)、锻锤(DH)和Instron(QS)制备Mg-B4C样品,其应变速率分别为1600、800和0.008 s-1.研究Mg-B4C复合材料的显微硬度、准静态及动态抗压强度等力学性能和磨损性能.结果显示,SHB和DH样品的硬度分别比QS样品高20.2%和5.7%.SHB法制备的Mg-10.0%B4C样品的磨损率和磨损质量损失分别比QS样品的低33%和39%.与纯Mg相比,SHB、DH和QS制备的Mg-5.0%B4C样品的准静态抗压强度分别提高39%、30%和29%.此外,含B4C样品的动态抗压强度比准静态抗压强度提高51%~110%.“,”The present study aims to fabricate and evaluate the mechanical properties and wear behavior of Mg metal matrix composite, reinforced by 0, 1.5, 3, 5 and 10 vol.% B4C microparticles. Mg-B4C samples were fabricated at 450 ℃ and under different loading rates by using split Hopkinson bar (SHB), drop hammer (DH) and Instron (QS) at strain rates of 1600, 800 and 0.008 s-1, respectively. The mechanical properties including microhardness, quasi-static and dynamic compressive strengths and wear behavior of samples were experimentally investigated. The results show that, the hardness of SHB and DH samples is obtained to be 20.2% and 5.7% higher than that of the QS sample, respectively. The wear rate and wear mass loss of Mg-10.0%B4C samples fabricated by SHB were determined lower than those of the QS sample by nearly 33% and 39%, respectively. The quasi-static compressive strengths of Mg-5.0%B4C are improved by 39%, 30% and 29% for the SHB, DH and QS samples, respectively, in comparison with the case of pure Mg. Furthermore, it is discovered that the dynamic compressive strength of samples is 51%-110% higher than their quasi-static value with respect to the B4C content.