Rusin Nikolay M, Skorentsev Alexander L, Krinitcyn Maksim G, Dmitriev Andrey I
Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences (ISPMS SB RAS), 2/4, pr. Akademicheskii, 634055 Tomsk, Russia.
Materials (Basel). 2021 Dec 27;15(1):180. doi: 10.3390/ma15010180.
The disadvantage of antifriction Al-Sn alloys with high tin content is their low bearing capacity. To improve this property, the aluminum matrix of the alloys was alloyed with zinc. The powder of Al-10Zn alloy was blended with the powder of pure tin in the proportion of 40/60 (wt.%). The resulting mixture of the powders was compacted in briquettes and sintered in a vacuum furnace. The sintered briquettes were subjected to subsequent pressing in the closed press mold at an elevated temperature. After this processing, the yield strength of the sintered (Al-10Zn)-40Sn composite was 1.6 times higher than that of the two-phase Al-40Sn one. The tribological tests of the composites were carried out according to the pin-on-disk scheme without lubrication at pressures of 1-5 MPa. It was established that the (Al-10Zn)-40Sn composite has higher wear resistance compared with the Al-40Sn one. However, this advantage becomes insignificant with an increase in the pressure. It was found that the main wear mechanism of the investigated composites under the dry friction process is a delamination of their highly deformed matrix grains.
高锡含量的减摩铝锡合金的缺点是其承载能力较低。为改善这一性能，在合金的铝基体中加入了锌。将Al-10Zn合金粉末与纯锡粉末按40/60（重量%）的比例混合。所得粉末混合物压制成型并在真空炉中烧结。烧结后的团块在高温下于封闭压模中进行后续压制。经过此加工后，烧结态的(Al-10Zn)-40Sn复合材料的屈服强度比两相Al-40Sn复合材料高1.6倍。复合材料的摩擦学测试按照销盘试验方案在1 - 5 MPa压力下无润滑条件下进行。结果表明，(Al-10Zn)-40Sn复合材料比Al-40Sn复合材料具有更高的耐磨性。然而，随着压力增加，这一优势变得不明显。研究发现，在干摩擦过程中，所研究复合材料的主要磨损机制是其高度变形的基体晶粒的分层。
