Department of Mechanical and Aerospace EngineeringOUR PEOPLE
Tong-Yi ZHANG 張統一
PhD, University of Science & Technology Beijing
Professor Emeritus of Mechanical and Aerospace Engineering
Member, Chinese Academy of Sciences
Member, Hong Kong Academy of Engineering Sciences (HKAES)

Professor Zhang has a strong background in materials science and engineering, and in solid mechanics as well. He has authored and co-authored over 180 SCI journal papers and three book chapters, which have been SCI-totally cited over 3480 times and over 2900 times by other researchers excluding himself and his co-authors. He has organized and co-organized three international conferences including the 8th International Conference on Fundamentals of Fracture. He has given 52 invited, keynote and plenary presentations at international and domestic conferences including the Plenary Lecture “Fracture of Piezoelectric Ceramics” at The 12th International Conference on Fracture, July 12-17, 2009, Ottawa, Canada. He has edited and co-edited eight special issues for international journals. He has been co-awarded two US patents. In 2012, Professor Zhang was elected to be a Fellow of the Hong Kong Academy of Engineering Sciences (HKAES) and received the Distinguished Research Excellent Award from the HKUST Engineering School. In 2011, Professor Zhang was elected to be a member of the Chinese Academy of Sciences. The honors he has received include also second prize of the 1987 State Natural Science Award, second prize of the 2007 State Natural Science Award, and the 1988 National Award for Young Scientists in Mainland China. In 2001, Professor Zhang received the Fellow Award from ASM International, USA. This ASM Fellow Award was in recognition of Zhang’s distinguished contributions in the field of materials science and engineering. Zhang’s citation reads: "For significant contributions to knowledge of hydrogen diffusion, fracture of piezoelectric ceramics, intercalated graphite, and thin film systems using both analytical and state-of-the-art experimental techniques." In 2003, Professor Zhang was awarded the Croucher Senior Research Fellowship Award. Due to high citations of a paper published in 2002, Professor Zhang received a card in March 2005 from the Web of Science, congratulating him for “The number of citations your article places it in the top 1% within its field according to Essential Science IndicatorsSM. Your work is highly influential, and is making a significant impact among your colleagues in your field of study.” In Nov. 2007, Professor Zhang received four such greeting cards from the Web of Science.


Teaching Activities

MECH3840 Mechanical Engineering Laboratory II
MECH5040 Nanoscale Thin Films and Nano-Structured Materials


Research Interests

Relationships of microstructure and properties in materials
Mechanical properties of materials
Surface stress and surface energy of solids
Defects of crystals
Fracture of piezoelectric materials
Micro/nanomechanics of materials
Materials science and mechanics of thin films
Thermodynamics and kinetics of materials 

Selected Publications

  • Guoyong Wang and Tong–Yi Zhang, Easy route to the wettability cycling of copper surface between superhydrophobicity and superhydrophilicity, ACS Applied Materials & Interfaces, Volume: 4 Issue: 1 (2012) 273-279. DOI: 10.1021/am2013129.
  • Jun-Yong Lu, Hang Ren, Dongmei Deng, Yong Wang, Kevin Chen, Kei May Lau, and Tong-Yi Zhang, Thermally Activated Pop-in and Indentation Size Effects in GaN Films, Journal of Physics D: Applied Physics, 45 (2012) 085301 DOI: 10.1088/0022-3727/45/8/085301.
  • Jing He, Tong-Yi Zhang and Guohua Chen, Ammonia gas-sensing characteristics of fluorescence-based poly(2-(acetoacetoxy)ethyl methacrylate) thin films, Journal of Colloid and Interface Science, 373 (2012) 94-101.  
  • Guoyong Wang and Tong–Yi Zhang, Oxygen-adsorption induced superhydrophilic-to-superhydrophobic transition on hierarchical nanostructured CuO surface, Journal of Colloid and Interface Science, 377 (2012) 438-441.
  • CuiYing Fan, MingHao Zhao, YongJie Zhu, HaiTao Liu, Tong-Yi Zhang, Analysis of Micro/Nanobridge Test Based on Nonlocal Elasticity, International Journal of Solids and Structures, 49 (2012) 2168–2176.
  • Jie Wang and Tong-Yi Zhang, Phase Field Study of Polarization Vortex in Ferroelectric Nanostructures, Journal of Advanced Dielectrics, Vol. 2, No. 2 (2012) 1241002 (13 pages). DOI: 10.1142/S2010135X12410020  
  • Tong-Yi Zhang and Tao Xie, Effect of electrostatic tractions on the fracture behavior of a dielectric material under mechanical and/or electric loading, Science China: Technological Sciences, Vol. 55 No. 9, (2012) 2391-2403. DOI: 10.1007/s11431-012-4985-4. 
  • Weilin Shu, Jie Wang, and Tong-Yi Zhang, Effect of grain boundary on the electromechanical response of ferroelectric polycrystals, Journal of Applied Physics, 112, 064108 (2012); doi: 10.1063/1.4752269.    
  • Peigang Deng, Yi-Kuen Lee, Ran Lin and Tong-Yi Zhang, Nonlinear Electro-Mechanobiological Behavior of Cell Membrane during Electroporation, Applied Physics Letters, 101, 053702 (2012); doi: 10.1063/1.4739940. 
  • Tong-Yi Zhang and Hang Ren, Solute concentrations and strains in nanograined materials, Acta Materialia, 61 (2013) 477-493.  
  • MingHao Zhao, HaiTao Liu, CuiYing Fan, Ernian Pan, Tong-Yi Zhang, Indentation stress in multi-layer delaminated thin films induced by a microwedge indenter, Composites: Part B 45 (2013) 845–851.
  • Jun-Yong Lu, Dongmei Deng, Yong Wang, Kevin Chen, Kei May Lau, and Tong-Yi Zhang, Phonon deformation potentials of hexagonal GaN studied by biaxial stress moduluation, AIP Advances, 1 (2011) 032132. doi:10.1063/1.3626532
  • Sheng Sun, Joseph T. Y. Wong, and Tong–Yi Zhang, Atomistic simulations of electroporation in pre-water-embedded membranes, Journal of Physical Chemistry B, 115 (2011) 13355-13359. DOI: 10.1021/jp206607j 
  • Sheng Sun, Joseph T. Y. Wong, and Tong–Yi Zhang, Effects of external electric fields on self-assembly of phospholipids/water mixtures — Coarse-grained molecular dynamics simulations, Soft Matter, 7 (2011) 9307 - 9310. DOI: 10.1039/c1sm05883e
  • CuiYing Fan, MingHao Zhao, Li-Cheng Meng, Cun-Fa Gao, and Tong-Yi Zhang, On the self-consistent, energetically consistent, and electrostatic traction approaches in piezoelectric fracture mechanics, Engineering Fracture Mechanics, 78 (2011) 2338-2355. doi:10.1016/j.engfracmech.2011.05.006  
  • X. Sun, Y.J. Su, K.W. Gao, L.Q. Guo, L.J. Qiao, W.Y. Chu, Tong-Yi Zhang, Surface potential distribution in an indentation-pre-cracked BaTiO3 single crystal, Journal of the American Ceramic Society, 94 (2011) 429-4304. DOI: 10.1111/j.1551-2916.2011.04634.x.
  • Tong-Yi Zhang, Hang Ren, Zhijia Wang, Sheng Sun, Surface eigen-displacement and surface Poisson's ratios of solids, Acta Materialia, 59 (2011) 4437–4447. doi:10.1016/j.actamat.2011.03.067 
  • Sheng Sun, Guangyao Yin, Yi-Kuen Lee, Joseph T. Y. Wong, Tong-Yi Zhang, Effects of toughness and thermal motion of lipid membrane on electroporation: by molecular dynamics simulations, Biochemical and Biophysical Research Communications, 404 (2011) 684-688. doi:10.1016/j.bbrc.2010.12.042
  • Sheng Sun, Joseph T. Y. Wong, and Tong-Yi Zhang, Molecular dynamics simulations of phase transition of lamellar lipid membrane in water under an electric field, Soft Matter, 7 (2011) 147 – 152. DOI: 10.1039/c0sm00555j
  • SY Dai, Y Xiang, Tong-Yi Zhang, A continuum model for twin boundary junctions based on the Peierls-Nabarro framework, Scripta Materialia, 64 (2011) 438–441. doi:10.1016/j.scriptamat.2010.11.008
  • Wing Kin Chan and Tong-Yi Zhang, Mechanics analysis and atomistic simulations of nanobridge tests, Journal of Applied Physics, 107 (2010) 023526. doi:10.1063/1.3294610
  • Dong-Jun Yan, Hai-You Huang, Chi-Wai Cheung, Tong-Yi Zhang, Fracture criterion for conductive cracks in soda-lime glass under combined mechanical and electrical loading, International Journal of Fracture, 164 (2010) 185-199. DOI 10.1007/s10704-010-9468-7
  • Jie Wang, Marc Kamlah, Tong-Yi Zhang, Phase field simulations of ferroelectric islands, thin films and nanoparticles, Acta Mechanica, 214, (2010) 49–59. DOI 10.1007/s00707-010-0322-9
  • Ming-Hao Zhao, Ke Zhang, Tong-Yi Zhang, Reissner plate-theory-based study of circular and annular delamination buckling of a film on a substrate, Engineering Fracture Mechanics, 77 (2010) 1479–1491. doi:10.1016/j.engfracmech.2010.04.018
  • Tong-Yi Zhang, Zhi-Jia Wang, and Wing-Kin Chan, Eigenstress model for surface stress of solids, Physical Review B, 81 (2010) 195427. DOI: 10.1103/PhysRevB.81.195427
  • Ming Wu, Haiyou Huang, Wuyang Chu, Lijie Qiao, Jiayue Xu, Tong-Yi Zhang, Tuning the ferroelectric and piezoelectric properties of 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 single crystals and lead zirconate titanate ceramics by doping hydrogen, The Journal of Physical Chemistry C, 114 (2010) 9955-9960.
  • Wing Kin Chan, Jianrong Li, Yong Wang, Shengyao Zhang, and Tong-Yi Zhang, Analysis of Nanobridge Tests, Acta Mechanica Solida Sinica, Vol. 23, No. 4 (2010) 283-296.
  • Zhi-Jia Wang, Chong Liu, Zhi-Gang Li and Tong-Yi Zhang, Size-dependent elastic properties of Au nanowires under bending and tension  Surfaces vs Core nonlinearity, Journal of Applied Physics, Vol. 108, 083506 (2010).
  • C. D. Gu, J. P. Tu and Tong-Yi Zhang, Deposition and wettability of silver nanostructures on Si(100) substrate based on galvanic displacement reactions, Applied Surface Science, 257 (2010) 1779–1785.
  • Jun-Yong LU, Zhi-Jia WANG, Dong-Mei DENG, Yong WANG, Kevin Jing CHEN, Kei-May LAU and Tong-Yi Zhang, Determining Phonon Deformation Potentials of Hexagonal GaN with Stress Modulation, Journal of Applied Physics, 108 (2010) 123520. DOI: 10.1063/1.3524548
  • Changdong Gu, Hang Ren, Jiangping Tu, Tong-Yi Zhang, Micro/nano-binary structure of silver films on copper alloys with stable water-repellent property under dynamic conditions, Langmuir, 25(20) (2009), 12299–12307. DOI: 10.1021/la902936u
  • Hai-You Huang, Zhi-Ying Li, Jun-Yong Lu, Zhi-Jia Wang, Chong-Shun Wang, Kei-May Lau, Kevin Jing Chen, and Tong-Yi Zhang, Microbridge tests on gallium nitride thin films, Journal of Micromechanics and Microengineering, 19 (2009) 095019 (13pp).
  • Yong-Sheng Li, Shu-Xiao Li, Tong-Yi Zhang, Effect of Dislocations on Spinodal Decomposition in Fe-Cr Alloys, Nuclear Materials, 395 (2009) 120–130. doi:10.1016/j.jnucmat.2009.10.042
  • Changdong Gu, Chun Cheng, Haiyou Huang, Tailun Wong, Ning Wang, Tong-Yi Zhang, Growth and Photocatalytic Activity of Dendrite-like ZnO@Ag Heterostructure Nanocrystals, Crystal Growth & Design, Vol. 9, No. 7 (2009) 3278-3285.
  • Lilin Liu and Tong-Yi Zhang, Diffusion through a polycrystalline thin film, Applied Physics A, Materials Science & Processing, 96 (2009) 515–520.
  • Lilin Liu, Haiyou Huang, Ran Fu, Deming Liu, Tong-Yi Zhang, Cu diffusion kinetics in (Cu,Ni)3Sn intermetallic compound nanolayers investigated by an energy-dispersive-X-ray-based permeation test, Thin Solid Films, 518 (2009) 201–205.
  • Lilin Liu, Haiyou Huang, Ran Fu, Deming Liu, Tong-Yi Zhang, DO22-(Cu,Ni)3Sn intermetallic compound nanolayer formed in Cu/Sn-nanolayer/Ni structures, Journal of Alloys and Compounds, 486 (2009) 207–211. DOI: 10.1016/j.jallcom.2009.07.054
  • Jie Wang, Marc Kamlah, Tong-Yi Zhang, Phase field simulations of ferroelectric nanoparticles with different long-range-electrostatic and -elastic interactions, Journal of Applied Physics, 105, 014104 (2009).
  • Zhaoxia Ping, Yedong He, Changdong Gu, Tong-Yi Zhang, Electroless plating Ni-P coatings on carbon steel in a stirred bed of glass balls, Journal of Applied Electrochemistry, 39 (2009) 879-885.
  • Minghao Zhao, Lipan Yao, Tong-Yi Zhang, Stress Analysis of Microwedge Indentation-Induced Delamination, Journal of Materials Research, Vol. 24, No. 6, Jun 2009, 1943-1949.
  • Tong-Yi Zhang, Strained Ferroelectric Thin Films, International Journal of Applied Mechanics, Vol. 1, No. 1 (2009) 21-40.
  • Changdong Gu, Hui Xu, Tong-Yi Zhang, Fabrication of high aspect-ratio through-wafer copper interconnects by reverse pulse electroplating, Journal of Micromechanics and Microengineering, 19 (2009) 065011 (5pp).
  • Tong-Yi Zhang, Microbridge Tests, Chapter 10 in “Micro and Nano Mechanical Testing of Materials and Devices”, edited by Fuqian Yang and J.C.M. Li, Springer Science+Business Media, LLC, (2008) pp. 215-285.
  • Ping-Li Liu, Jie Wang, Tong-Yi Zhang, Yulan Li, Long-Qing Chen, Xing-Qiao Ma, Wu-Yang Chu and Li-Jie Qiao, Effects of unequally biaxial misfit strains on polarization phase diagrams and domain structures in embedded ferroelectric thin layers - Phase field simulations, Applied Physics Letters, 93, 132908 (2008).
  • Changdong Gu, Tong-Yi Zhang, Electrochemical synthesis of silver polyhedrons and dendritic films with superhydrophobic surfaces, Langmuir, 24 (2008) 12010-12016.
  • Jie Wang and Tong-Yi Zhang, Phase field simulations of a permeable crack parallel to the original polarization direction in a ferroelectric mono-domain, Engineering Fracture Mechanics, 75 (2008) 4886–4897.
  • Zhaoxia Ping, Yedong He, Changdong Gu, Tong-Yi Zhang, Mechanically Assisted Electroplating of Ni-P Coatings on Carbon Steel, Surface & Coatings Technology, 202 (2008) 6023–6028.
  • Wing Kin Chan, Miao Luo, and Tong-Yi Zhang, Molecular Dynamics Simulations of Four-Point Bending Tests on SiC Nanowires, Scripta Materialia, 59 (2008) 692–695.
  • Jie Wang, Marc Kamlah, Tong-Yi Zhang, Yulan Li and Long-Qing Chen, Size-Dependent Polarization Distribution in Ferroelectric Nanostructures: Phase Field Simulations, Applied Physics Letters, 92, 162905 (2008).
  • Tong-Yi Zhang, Miao Luo, and Wing Kin Chan, Size-dependent Surface Stress, Surface Stiffness, and Young's Modulus of Hexagonal Prism [111] beta-SiC Nanowires, Journal of Applied Physics, 103, 104308 (2008).
  • Z.F. Shi, B. Huang, H. Tan, Y. Huang, Tong-Yi Zhang , P.D. Wu, K.C. Hwang, H. Gao, Determination of the Microscale Stress-Strain Curve and Strain Gradient Effect from the Micro-bend of Ultra-thin Beams, International Journal of Plasticity, 24 (2008) 1606–1624.
  • Lilin Liu, Yousheng Zhang and Tong-Yi Zhang, Critical thickness for misfit twinning in an epilayer, International Journal of Solids and Structures, 45 (2008) 3173–3191.
  • Jie Wang and Tong-Yi Zhang, Influence of depolarization field on polarization states in epitaxial ferroelectric thin films with nonequally biaxial misfit strains, Physical Review B, 77, 014104 (2008).
  • Jie Wang and Tong-Yi Zhang, Phase field simulations of polarization switching-induced toughening in ferroelectric ceramics, Acta Materialia, 55 (2007) 2465-2477.
  • Ming-Hao Zhao, Jian Zhou, Feng Yang, Tong Liu, Tong-Yi Zhang, Effects of substrate compliance on circular buckle delamination of thin films, Engineering Fracture Mechanics, 74 (2007) 2334-2351.
  • Sun-Chien Ko, Tong-Yi Zhang, Sanboh Lee, Influence of Chemical Stresses in the Permeation, One-side and Two-side Charging Processes, Journal of Applied Physics, 101, 113521 (2007).
  • Ming-Hao Zhao, Feng Yang, Tong-Yi Zhang , Delamination Buckling in the Microwedge Indentation of a Thin Film on an Elastically Deformable Substrate, Mechanics of Materials , 39 (2007) 881-892.
  • Lilin Liu, Yousheng Zhang and Tong-Yi Zhang, Strain relaxation in heteroepitaxial films by misfit twinning: I. Critical thickness, Journal of Applied Physics , 101, 063501 (2007).
  • Yousheng Zhang, Lilin Liu, and Tong-Yi Zhang, Strain relaxation in heteroepitaxial films by misfit twinning: II. Equilibrium morphology, Journal of Applied Physics, 101, 063502 (2007).
  • Xu-Sheng Wang and Tong-Yi Zhang , Microbridge tests on bilayer thin films, Metallurgical and Materials Transactions A , 38A (2007) 2273-2282.
  • Minghao Zhao, Caifu Qian, S.W.R. Lee, Pin Tong, H. Suemasu, Tong-Yi Zhang , Electro-elastic Analysis of Piezoelectric Laminated Plates, Advanced Composite Materials, 16 (2007) 63-81.
  • Tong-Yi Zhang , Guoning Liu, Tianhong Wang, and Pin Tong, Application of the Concepts of Fracture Mechanics to the Failure of Conductive Cracks in Piezoelectric Ceramics, Engineering Fracture Mechanics, 74 (2007) 1160-1173.
  • K.L. Lau Ringo, C.M. Kwok Alvin, W.K. Chan, T.Y. Zhang and T.Y. Wong Joseph, Mechanical Characterization of Cellulosic Thecal Plates in Dinoflagellates by Nanoindentation, Journal of Nanoscience and Nanotechnology, 7 (2007) 1-6.
  • Lilin Liu, Deming Liu, Ran Fu, Yiu Fai Kwan, Chun Ho Yau, and Tong-Yi Zhang , Epitaxy-like protective layers for high-performance low-cost Au/Pd/Ni pre-plated Cu alloy leadframes, IEEE Transactions on Advanced Packaging, 29 (2006) 683-689.
  • Ran Fu, Lilin Liu, Deming Liu, Tong-Yi Zhang , In-situ formation of Cu-Sn-Ni intermetallic nano-layer as a diffusion barrier in pre-plated leadframes, Applied Physics Letters, 89, 131911 (2006).
  • Jie Wang and Tong-Yi Zhang, Size effects in epitaxial ferroelectric islands and thin films, Physical Review B, 73, 144107 (2006).
  • Jie Wang and Tong-Yi Zhang, The effect of long-range elastic interactions on the toroidal moment of polarization in a ferroelectric nanoparticle, Applied Physics Letters, 88, 182904 (2006).
  • Cun-Fa Gao, Naotake Noda and Tong-Yi Zhang, Dielectric breakdown model for a conductive crack and electrode in piezoelectric materials, International Journal of Engineering Science, 44 (2006) 256-272.
  • Bin Huang and Tong-Yi Zhang, Microbridge tests II - On buckled thin gold films, Journal of Micromechanics and Microengineering, 16 (2006) 134-142.
  • Xusheng Wang, Jianrong Li, and Tong-Yi Zhang, Microbridge tests I - On asymmetrical trilayer films, Journal of Micromechanics and Microengineering, 16 (2006) 122-133.



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