• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of nanomaterials >Tensile Mechanical Properties and Strengthening Mechanism of Hybrid Carbon Nanotube and Silicon Carbide Nanoparticle-Reinforced Magnesium Alloy Composites
【24h】

Tensile Mechanical Properties and Strengthening Mechanism of Hybrid Carbon Nanotube and Silicon Carbide Nanoparticle-Reinforced Magnesium Alloy Composites

机译：碳纳米管和碳化硅纳米颗粒增强镁合金复合材料的拉伸力学性能和增强机理

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

AZ91 magnesium alloy hybrid composites reinforced with different hybrid ratios of carbon nanotubes (CNTs) and silicon carbide (SiC) nanoparticulates were fabricated by semisolid stirring assisted ultrasonic cavitation. The results showed that grains of the matrix in the AZ91/(CNT + SiC) composites were obviously refined after adding hybrid CNTs and SiC nanoparticles to the AZ91 alloy, and the room-temperature mechanical properties of AZ91/(CNT + SiC) hybrid composites were improved comparing with the unreinforced AZ91 matrix. In addition, the tensile mechanical properties of the AZ91 alloy-based hybrid composites were considerably improved at the mass hybrid ratio of 7 : 3 for CNTs and SiC nanoparticles; in particular, the tensile and yield strength were increased, respectively, by about 45 and 55% after gravity permanent mould casting. The reason for an increase in the room-temperature strength of the hybrid composites should be mainly attributable to the larger hybrid ratio of CNTs and SiC nanoparticles, the coefficient of thermal expansion (CTE) mismatch between matrix and hybrid reinforcements, the dispersive strengthening effects (Orowan strengthening), and the grain refining (Hall-Petch effect).
机译：通过半固态搅拌辅助空化，制备了碳纳米管（CNTs）和碳化硅（SiC）纳米颗粒不同混合比的AZ91镁合金混合复合材料。结果表明，将杂化碳纳米管和SiC纳米颗粒添加到AZ91合金中后，AZ91 /（CNT + SiC）复合材料的基体晶粒明显细化，AZ91 /（CNT + SiC）杂化复合材料的室温力学性能与未增强的AZ91基质相比，其性能得到了改善。此外，在CNT和SiC纳米粒子的质量混合比为7：3的情况下，AZ91合金基杂化复合材料的拉伸力学性能得到显着改善。特别是重力永久铸模铸造后，抗拉强度和屈服强度分别提高了约45％和55％。杂化复合材料室温强度增加的原因主要应归因于CNT和SiC纳米颗粒的杂化比更大，基体与杂化增强材料之间的热膨胀系数（CTE）不匹配，分散增强效应（ Orowan强化）和晶粒细化（Hall-Petch效应）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号