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Dry Sliding Wear Behavior of (GNPs + TiB 2 )-Reinforced AZ91 Magnesium Matrix Hybrid Composites Produced by Pressure Infiltration Casting Method
International Journal of Metalcasting ( IF 2.6 ) Pub Date : 2021-01-02 , DOI: 10.1007/s40962-020-00552-w
Engin Cevik , Murat Gundogan

In this study, TiB2- and graphene-reinforced Mg matrix (AZ91) composites were produced by the pressure infiltration method. The production process was carried out at 750 °C and 8 bar pressure in the SF6 gas atmosphere. The hardness, compression, and wear behaviors of the composite materials were examined. In addition, SEM examinations were conducted to understand the wear mechanisms of produced samples. The porosity ratio increased with the increasing graphene ratio. At the end of the measurements, the highest compressive strength was measured as 415 MPa and 140.6 HB in composite containing 0.25 vol% graphene compared to pure matrix and composite containing only TiB2. The highest abrasion resistance was achieved with the addition of 0.25 vol% graphene.



中文翻译:

压铸法制备(GNPs + TiB 2)增强的AZ91镁基杂化复合材料的干滑磨损行为

在这项研究中,通过压力渗透法制备了TiB 2-和石墨烯增强的Mg基质(AZ91)复合材料。生产过程在SF6气体气氛中,750°C和8 bar压力下进行。检查了复合材料的硬度,压缩和磨损行为。另外,进行了SEM检查以了解所产生样品的磨损机理。孔隙率随石墨烯比的增加而增加。在测量结束时,与纯基质和仅含TiB 2的复合材料相比,在含0.25%(体积)石墨烯的复合材料中测得的最高抗压强度为415 MPa和140.6 HB 。加入0.25%(体积)的石墨烯可获得最高的耐磨性。

更新日期:2021-01-03
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