Negative Poisson’s ratio structures produced from zirconia and nickel using co-extrusion
- 219 Downloads
Objects with a complex structure designed to display negative Poisson’s ratio were produced from zirconia ceramic and from metallic nickel. The objects were arrays of repeat units with designed elastic behavior. The technique of microfabrication by coextrusion, based on oxide powders blended with thermoplastics, was used to replicate and miniaturize single 38 mm repeat unit to obtain an array of 64 units, 400 μm in size. The metallic nickel objects were produced fabricating nickel oxide, followed by sintering in a reducing atmosphere to yield dense metallic nickel. Poisson’s ratio of the nickel structure was −0.3.
KeywordsTopology Optimization Repeat Unit Nickel Oxide Metallic Nickel Apparent Shear Rate
The authors thank the Office of Naval Research and Dr. Stephen Fishman for support.
- 2.Gibson L, Ashby M (1997) Cellular solids, 2nd edn. Cambridge University Press, Cambridge, p 187Google Scholar
- 5.Neale PJ, Alderson KL, Pickles AP, Evans KE (1993) J Mater Sci Lett 12:1529Google Scholar
- 11.Choi JB, Lakes RS (1991) Cell Polymer 10:205Google Scholar
- 13.Choi JB, Lakes RS (1992) J Mater Sci 27:5372Google Scholar
- 14.Fonseca JSO (1997) Design of microstructures of periodic composite materials. PhD Thesis, University of Michigan, Department of Mechanical Engineering and Applied MechanicsGoogle Scholar
- 19.German RM (1984) Powder metallurgy science, 2nd edn. Metal Powder Industries Federation, Princeton, NJ, p 95Google Scholar
- 20.Davis JR (ed) (1998) Metals handbook – desk edition, 2nd edn. ASM International, Materials Park, OH, p 609Google Scholar
- 21.Frecker M, Ananthasuresh G, Nishiwaki S, Kikuchi N, Kota S (1997) J Mech Des 119:238Google Scholar