Glenn D. Hibbard | BSc (Alberta), PhD (Toronto), PEng
Professor & Canada Research Chair, Cellular Hybrid Materials (Tier II)
Office: WB 156
Research Group: Cellular Hybrid Materials Research Group
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- MSE professor recognized for teaching excellence in early-career
- Instructor of the Year, Impact Student Choice Awards, Department of Materials Science & Engineering, U of T (2014)
- Early Career Teaching Award, Faculty of Applied Science & Engineering, University of Toronto (2010)
- University of Toronto Engineering Society Teaching Award (2007)
- Professional Engineers of Ontario (PEO)
- Materials Research Society (MRS)
- The Minerals, Metals, and Materials Society (TMS)
- ASM International
New regions of material property space can be accessed by combining microstructural design at the nm-scale, with architectural design at the μm- or mm-scale. For example, the large strength increase associated with grain size reduction to below 50 nm has driven global research efforts into the development of nanocrystalline materials. For many potential structural applications, however, the density of a nanocrystalline material is just as important as its strength. In fact, reducing the density is more important than increasing the strength for certain weight specific materials performance indices and is especially critical for applying structural nanomaterials in the aerospace and automotive sectors.
We are developing a new class of structural nanomaterial where in the effective density of the parent metal is reduced by more than an order of magnitude by incorporating a periodic cellular architecture of open space. In one example a low density cellular nanocrystalline material was created by electroforming nanocrystalline Ni around a rapid prototyped acrylic photopolymer micro-truss. This new hybrid material combined the structural efficiency of micro-truss architectures with the ultra-high strength that can be achieved by grain size reduction to the nm-scale.
Electrodeposited nanocrystalline material can also be used to reinforce conventional metallic micro-truss materials, creating metal/metal cellular hybrids. This approach is particularly effective because the ultra-high strength material is optimally located at the furthest distance from the neutral bending axis of the constituent micro-truss struts. The mechanical performance of these new hybrids is controlled by the interconnected network of nanocrystalline tubes.
E. Bele and G.D. Hibbard, “Reinforcement of Microtruss Cellular Materials by Nanocrystalline Electrodeposition”, Scripta Materialia, 68 (2013) 31-34.
A. Lausic, B.A. Bouwhuis, J.L. McCrea, G. Palumbo, and G.D. Hibbard, “Mechanical Anisotropy in Electrodeposited Nanocrystalline Metal/Metal Composite Foams”, Materials Science and Engineering A, 552 (2012) 157-163
K.A. Samk, B. Yu, and G.D. Hibbard, “Architectural Design in Stretch-Formed Microtruss Composites”, Composites: Part A, 43 (2012) 955-961.
M. Hostetter, B. Cordner, and G.D. Hibbard, “Stochastic Honeycomb Sandwich Cores”, Composites: Part B, 43 (2012) 1024-1029.
J.E. Campbell, M. Suralvo, H. Naguib, and G.D. Hibbard, “Foamed Core Microtruss Nanocrystalline Ni Cellular Hybrids”, Journal of Composite Materials, 46 (2011) 63-70.
E. Bele, B.A. Bouwhuis, C. Codd, and G.D. Hibbard, “Structural Ceramic Coatings in Composite Microtruss Cellular Materials”, Acta Materialia, 59 (2011) 6145-6154.
B.A. Bouwhuis, B. Chehab, O. Bouaziz, D. Embury, H. Zurob, and G.D. Hibbard, “Deformation Twinning as a Strengthening Mechanism in Microtruss Cellular Materials”, Scripta Materialia, 63 (2010) 609-612.
S. Ho, C. Ravindran, and G.D. Hibbard, “Magnesium Alloy Microtruss Materials”, Scripta Materialia, 62 (2010) 21-24.
B.A. Bouwhuis, and G.D. Hibbard, “Relative Significance of In-Situ Work-Hardening in Deformation-Formed Microtruss Materials”, Materials Science and Engineering A, 527 (2010) 565-573.
E. Bele, B.A. Bouwhuis, and G.D. Hibbard, “Failure Mechanisms in Metal/Metal Nanocrystalline Microtruss Materials”, Acta Materialia, 57 (2009) 5927-5935.
B.A. Bouwhuis, J.L. McCrea, G. Palumbo, and G.D. Hibbard, “Mechanical Properties of Hybrid Nanocrystalline Metal Foams”, Acta Materialia, 57 (2009) 4046-4053.
L.M. Gordon, B.A. Bouwhuis, M. Suralvo, J.L. McCrea, G. Palumbo, and G.D. Hibbard, “Microtruss Nanocrystalline Ni Hybrids”, Acta Materialia, 57 (2009) 932-939.
B.A. Bouwhuis, T. Ronis, J.L. McCrea, G. Palumbo, and G.D. Hibbard, “Structural Nanocrystalline Ni Coatings on Periodic Cellular Steel”, Composites Science and Technology, 69 (2009) 385-390.
M. Suralvo, B.A. Bouwhuis, J.L. McCrea, G. Palumbo, and G.D. Hibbard, “Hybrid Nanocrystalline Periodic Cellular Materials”, Scripta Materialia, 58 (2008) 247-250. Highlighted in Editor’s Choice section of Science [Science 318 (2007) 1697].
E. Bele, B.A. Bouwhuis, and G.D. Hibbard, “Work-Hardening as a Strengthening Mechanism in Periodic Cellular Sandwiches”, Materials Science and Engineering A, 489 (2008) 29-37.
B.A. Bouwhuis, and G.D. Hibbard, “Failure Mechanisms during Periodic Cellular Metal Fabrication by Perforation-Stretching”, Metallurgical and Materials Transactions A, 39 (2008) 3027-3033.
B.A. Bouwhuis, S.K. Tang, and G.D. Hibbard, “Process-Microstructure-Property Relationships in AA3003 Expanded Periodic Cellular Materials”, Composites: Part A, 39 (2008) 1556-1564.
B.A. Bouwhuis, E. Bele, and G.D. Hibbard, “Edge Effects in Compression Testing Periodic Cellular Materials”, Journal of Materials Science, 43 (2008) 3267-3273.
G.D Hibbard, V. Radmilovic, G. Palumbo, K.T. Aust, and U.Erb, “Grain Boundary Migration during Abnormal Grain Growth in Nanocrystalline Ni” Materials Science and Engineering A, 494 (2008) 232-238.
I. Brooks, P. Lin, G. Palumbo, G.D. Hibbard, and U. Erb, “Hardness-Tensile Strength Relationships for Nanocrystalline Materials”, Materials Science and Engineering A, 491 (2008) 412-419.
H.S. Wei, G.D. Hibbard, G. Palumbo, U. Erb, “The Effect of Gauge Volume on the Tensile Properties of Nanocrystalline Electrodeposits”, Scripta Materialia, 57 (2007) 996-999.
P. Egberts, P. Brodersen, and G.D. Hibbard, “Mesoscale Structure in Electrodeposited Nanocrystalline Ni-Fe Alloys”, Materials Science and Engineering A, 441 (2006) 336-341.
G.D. Hibbard, K.T. Aust, and U. Erb, “The Effect of Starting Nanostructure on the Thermal Stability of Electrodeposited Nanocrystalline Co”, Acta Materialia, 54 (2006) 2501-2510.
G.D. Hibbard, G. Palumbo, K.T. Aust, and U. Erb, “Nanoscale Combined Reactions: Non-Equilibrium α-Co Formation in Nanocrystalline epsilon-Co by Abnormal Grain Growth”, Philosophical Magazine, 86 (2006) 125-139.