We herein report fabrication of hexagonal boron nitride nanosheet (BNNS) reinforced AlSi10Mg composites using a combination of spark plasma sintering (SPS) and hot rolling, the microstructure and mechanical properties of the resulting composites were investigated. The obtained composites present dense microstructure with BNNS uniform distribution. Trace amounts of interfacial-reaction products such as AlN, AlB are observed to endow BNNS-Al interface with good adhesive strength, the interfacial reactions are greatly governed by atom competitive diffusion. In comparison with monolithic AlSi10Mg alloy, the BNNS/AlSi10Mg composites display simultaneous improvements in tensile strength and ductility. In particular, the AlSi10Mg composite with 0.5 wt% BNNS addition exhibits a yield strength of ∼221 MPa and an elongation of ∼8.3 %, representing enhancements of ∼12.7 % and ∼29.7 %, respectively. The possible synergetic strengthening and toughening mechanisms of the resulting composites are discussed based on the test results.

中文翻译：

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同时增强六方BN纳米片增强AlSi10Mg复合材料的强度和延展性

我们在此报道了采用放电等离子烧结（SPS）和热轧相结合的方法制造了六方氮化硼纳米片（BNNS）增强的AlSi10Mg复合材料，并对所得复合材料的微观结构和机械性能进行了研究。所得复合材料呈现致密的微观结构，BNNS 分布均匀。观察到痕量的AlN、AlB等界面反应产物赋予BNNS-Al界面良好的粘合强度，界面反应很大程度上受原子竞争扩散的控制。与整体式AlSi10Mg合金相比，BNNS/AlSi10Mg复合材料在拉伸强度和延展性方面同时得到改善。特别是，添加 0.5 wt% BNNS 的 AlSi10Mg 复合材料的屈服强度为~221 MPa，伸长率为~8.3%，分别提高了~12.7% 和~29.7%。根据测试结果讨论了所得复合材料可能的协同强化和增韧机制。