Metal matrix nanocomposites represent a relatively new class of material, which is still being extensively investigated. Most of the studies, however, are devoted to aluminium- or magnesium-based nanocomposites. A limited number of studies focus on zinc alloy base nanocomposites, with fewer still concentrating on zinc alloy base micro-nanocomposites. In addition, most of the tribological studies investigate adhesive or abrasive wear resistance, whereas studies of erosive wear resistance lag well behind. It was previously shown that the presence of nanoparticles in ZA-27 alloy-based nanocomposites led to a slight increase in erosive wear resistance. Upon discovering that, the aim became to produce micro-nanocomposites that would retain the positive effect of nanoparticles, while further elevating performance, by combining microparticles with nanoparticles. The ZA-27 alloy-based micro-nanocomposites were reinforced with 3 wt. % Al₂O₃ microparticles (particle size approx. 36 μm) and with four different amounts (0.3, 0.5, 0.7 and 1 wt. %) of Al₂O₃ nanoparticles (particle size 20–30 nm). Tested materials were produced by the compocasting process, with mechanical alloying pre-processing. Solid particle erosive wear testing, with particle impact angle of 90°, showed that all micro-nanocomposites had significantly increased wear resistance in comparison to the reference material.

金属基质纳米复合材料代表了一类相对较新的材料，目前仍在广泛研究中。然而，大多数研究致力于铝或镁基纳米复合材料。有限的研究集中在锌合金基纳米复合材料上，而很少有研究集中在锌合金基纳米复合材料上。此外，大多数摩擦学研究都对胶粘剂或磨料的耐磨性进行了研究，而对侵蚀性耐磨性的研究则远远落后。先前显示，ZA-27合金基纳米复合材料中纳米粒子的存在导致耐侵蚀性磨损略有增加。发现这一点后，目标便是生产出能够保留纳米颗粒积极作用并进一步提高性能的微纳米复合材料，通过将微粒与纳米颗粒结合。ZA-27合金基微纳米复合材料用3 wt。铝含量₂ O ₃微粒（粒径约36μm）和四种不同量（0.3、0.5、0.7和1 wt。％）的Al ₂ O ₃纳米颗粒（粒径20–30 nm）。被测材料是通过复合铸造工艺进行的，并进行了机械合金化预处理。固体颗粒侵蚀性磨损测试（颗粒冲击角为90°）表明，与标准材料相比，所有微纳米复合材料的耐磨性均显着提高。