New Study Shows Nickel Graphene Can Be Tuned for Optimal Fracture Strength
FAYETTEVILLE, Ark. – In a new computational study published in The Journal of The Minerals, Metals & Materials Society, University of Arkansas engineering researchers found that nanocomposites composed of layers of nickel and graphene — a promising new material for flexible electronics devices — can be tuned for optimal fracture strength by manipulating the structural arrangement of the graphene sheets.
The study was conducted by Scott Muller, mechanical engineering graduate student, and Arun Nair, assistant professor of mechanical engineering.
Discovered in 2004, graphene is one of the strongest, lightest and most conductive materials known. It is 100 times stronger than steel. When incorporated in to a metal matrix, these properties can lead to stronger and yet lighter materials, such as those used on automobiles.
When combined with a metal such as nickel, graphene's superior mechanical properties make it an excellent candidate for a nanocomposite fiber material to be used in flexible electronic devices and other technologies. Nickel is often used in metal-graphene nanocomposite research because graphene sticks strongly to its surface.
Muller and Nair simulated a graphene sheet embedded within a nickel matrix. A crack was built into the nickel matrix, and then they tested different distances between the graphene and the crack. When the distance between the graphene and the crack was large, the nanocomposite proved more resistant to deformation. They also found that graphene acted as an effective barrier to deformations in the metal, ensuring that failure in one part of the metal would not carry over past the graphene sheet.
The university will continue to monitor the FY24 appropriations process and keep the campus community informed accordingly.
Candrilli will read from their work at 7 p.m. Thursday in the Home Economics Auditorium, room 0102, as the 2023-24 Walton Visiting Writer in Poetry.
The Bridge Fellows Program is designed to support graduate research on gender issues in any department or college for the spring semester.
Gavin Miller, an honors junior from Bryant who is studying public health and biology, has been selected as the Student Leader of the Month for August.
The U of A System Office has announced that eligible U of A employees will soon have access to Respiratory Syncytial Virus Infection vaccines covered with no out-of-pocket expense through United Medical Resources.