• 文献标题:   Mechanical enhancement of an aluminum layer by graphene coating
  • 文献类型:   Article
  • 作  者:   ERTURK AS, KIRCA M, KIRKAYAK L
  • 作者关键词:   amorphization, carboncoated aluminum, deformation characteristic, mechanical behavior, molecular dynamic
  • 出版物名称:   JOURNAL OF MATERIALS RESEARCH
  • ISSN:   0884-2914 EI 2044-5326
  • 通讯作者地址:   Istanbul Tech Univ
  • 被引频次:   1
  • DOI:   10.1557/jmr.2018.261
  • 出版年:   2018

▎ 摘  要

In this paper, mechanical characteristics of the aluminum layer coated with graphene are investigated by performing numerical tensile experiments through classical molecular dynamics simulations. Based on the results of the simulations, it is shown that coating with graphene enhances the Young's modulus of aluminum by 88% while changing the tensile behavior of aluminum with hardening-softening mechanisms and significantly increased toughness. Furthermore, the effect of loading rate is examined and a transformation to an amorphous phase is observed in the coated aluminum structure as the loading rate is increased. Even though the dominant component of the coated hybrid structure is the aluminum core in the elastic region, the graphene layer shows its effects majorly in the plastic region by a 60% increase in the ultimate tensile strength. High loading rates at room temperature cause the structure transforms to an amorphous phase, as expected. Thus, effects of loading rate and temperature on amorphization are investigated by performing the same simulations at different strain rates and temperatures (i.e., 0, 300, and 600 K).